TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

Future Technology Devices International Ltd

TTL-232R
TTL to USB Serial Converter Range ofCablesDatasheet

Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation aresupplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Yourstatutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system inwhich the failure of the product might reasonably be expected to result in personal injury. This document provides preliminar y
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH United Kingdom. Scotland Registered Company Number: SC136640

Copyright © Future Technology Devices International Limited1

TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

1 Description
The TTL-232R cables are a family of USB to TTL serial UART converter cables incorporating FTDI’s
FT232RQ USB to Serial UART interface IC device which handles all the USB signalling and protocols. The
cables provide a fast, simple way to connect devices with a TTL level serial interface to USB.
Each TTL-232R cable contains a small internal electronic circuit board, utilising the FT232R, which is
encapsulated into the USB connector end of the cable. The FT232R datasheet, DS_FT232R, is available at
http://www.ftdichip.com. The other end of the cable comes with a selection of different connectors
supporting various applications – see Table 1.1
Cables are FCC, CE, RoHS compliant and are available at TTL levels of +5V and +3.3V.
Cables are available with either a 6-way SIL,0.1” pitch connector, a 3.5mm Audio Jack, an 8 way, keyed
2mm pitch connector (intended for use with VMUSIC2 or VDRIVE2) or bare, tinned wire ended
connections (see Table 1.1)
The USB side of the cable is USB powered and USB 2.0 full speed compatible. Each cable is 1.8m longand supports a data transfer rate up to 3 Mbaud. Each cable supports the FTDIChip-ID™, with a unique
USB serial number programmed into the FT232R. This feature can be used to create a security or
password protected file transfer access using the cable. Further information and examples on this feature
are available at http://www.ftdichip.com under FTDIChip-ID Projects.
The TTL-232R cables require USB drivers, available free from http://www.ftdichip.com, which areused to make the FT232R in the cable appear as a virtual COM port (VCP). This then allows the user tocommunicate with the USB interface via a standard PC serial emulation port (for example TTY). Another
FTDI USB driver, the D2XX driver, can also be used with application software to directly access the
FT232R on the cable though a DLL. This is illustrated in the Figure 1.1

Various Connector
Options

VCP

TTY

Wire Ended

TTL-232R

3mm Audio Jack
6 way, 0.1" Single In Line connector

USB

Virtual COM Port

8 way, Keyed,2mm, Single In Lineconnector

Various Connector
Options
Wire Ended

D2XX

DLL

TTY

3mm Audio JackUSB

6 way, 0.1" Single In Line connector
8 way, Keyed,2mm, Single In Lineconnector

Software application access to USB via D2XX
Figure 1.1 Using the TTL-232R Cable

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

1.1 Available Cables and Part Numbers
The following Table 1.1 gives details of the available TTL-232R cables.
Part Number

TTL-232R-5V**

TTL-232R-3V3

Description
USB to UART cable with +5V TTL level
UART signals.

USB to UART cable with +3.3V TTL level
UART signals.

End Connector*

Cable details
6 core, UL2464

6 pin SIL, 0.1” pitch

24 AWG,
diam=5mm
6 core, UL2464

6 pin SIL, 0.1” pitch

24 AWG,
diam=5mm

TTL-232R-5V-

USB to UART cable with +5V TTL level

Wire Ended (noWE**

UART signals.

connector)

TTL-232R-3V3-

USB to UART cable with +3.3V TTL level

Wire Ended (noWE

UART signals.

connector)

TTL-232R-5V-

USB to UART cable with +5V TTL level

AJ**

UART signals.

6 core, UL2464
24 AWG,
diam=5mm
6 core, UL2464
24 AWG,
diam=5mm
2 core and spiral,

3.5mm Audio Jack

24 AWG
diam=5mm
2 core and spiral,

TTL-232R-3V3-

USB to UART cable with +3.3V TTL level

AJ

UART signals.

3.5mm Audio Jack

24 AWG
diam=5mm

8 way, keyed, 2mm
TTL-232R-3V3-

USB to UART cable with +3.3V TTL level

connector for use

2mm

UART signals.

with FTDI VDRIVE2or VMUSIC2 modules

7 core, UL2464
26 AWG,
diam=5mm

Table 1.1 TTL-232R Cables Descriptions and Part Numbers*

FTDI supports customised end connector designs. For more information, please contact FTDI Sales Team(sales1@ftdichip.com)** These cables are identical to cables which do not have the “5V” in the part number. The 5V was added to the partnumber for clarity.

Copyright © Future Technology Devices International Limited3

TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

1.2 Certifications
FTDI TTL-232R range of cables are fully RoHs compliant as well as CE and FCC certified (with the
exception of the TTL-232R-XX-WE cables which have not yet completed FCC and CE testing).

1.3 USB Compliant
The TTL-232R cables are fully compliant with the USB 2.0 specification.

Copyright © Future Technology Devices International Limited4

TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

Table of Contents
1

2

Description ...................................................................... 2
1.1

Available Cables and Part Numbers........................................... 3

1.2

Certifications ............................................................................ 4

1.3

USB Compliant .......................................................................... 4

Typical Applications ........................................................ 7
2.1

Driver Support .......................................................................... 7

2.2

Features .................................................................................... 8

3

Features of FT232R applicable toTTL-232R Cables .......... 94

TTL-232R-5V and TTL-232R-3V3 Cables ........................ 11
4.1 TTL-232R-5V, TTL-232R-3V3 Connector Pin Out and Mechanicaldetails ............................................................................................. 11

5

4.2

TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions .... 11

4.3

TTL-232R-5V and TTL-232R-3V3 Electrical Parameters........... 12

4.3.1

TTL-232R-5V Electrical Parameters ............................................................ 12

4.3.2

TTL-232R-3V3 Electrical Parameters .......................................................... 12

TTL-232R-5V-AJ and TTL-232R-3V3-AJ ......................... 14
5.1 TTL-232R-5V-AJ, TTL-232R-3V3-AJ Connector Pin Out andMechanical details ........................................................................... 14
5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal
Descriptions .................................................................................... 15
5.3

6

TTL-232R-5V-AJ and TTL-232R-3V3-AJ Electrical Parameters 15

5.3.1

TTL-232R-5V-AJ Electrical Parameters ........................................................ 15

5.3.2

TTL-232R-3V3-AJ Electrical Parameters ...................................................... 15

TTL-232R-5V-WE and TTL-232R-3V3-WE Cables ........... 17
6.1 TTL-232R-5V-WE, TTL-232R-3V3-WE Connections andMechanical Details........................................................................... 17
6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal
Descriptions .................................................................................... 17
6.3

7

TTL-232R-5V-WE and TTL-232R-3V3-WE Electrical Parameters
18

6.3.1

TTL-232R-5V-WE Electrical Parameters ...................................................... 18

6.3.2

TTL-232R-3V3-WE Electrical Parameters .................................................... 18

TTL-232R-3V3-2mm Cables ........................................... 20

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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Document No.: FT_000054 Clearance No.: FTDI# 53

7.1

TTL-232R-3V3-2mm Connector Pin Out and Mechanical details20

7.2

TTL-232R-3V3-2mm Cable Signal Descriptions ....................... 21

7.3

TTL-232R-3V3-2mm Electrical Parameters ............................. 21

8

Cable PCB Circuit Schematic .......................................... 23

9Contact Information ...................................................... 24

Appendix A - Cable EEPROM Configuration......................... 25
Appendix B - References .................................................... 27
Document References ..................................................................... 27
Acronyms and Abbreviations ........................................................... 27

Appendix C - List of Figures and Tables ............................. 28
List of Figures ................................................................................. 28
List of Tables ................................................................................... 28

Appendix D - Revision History ............................................ 29

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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2 Typical Applications
USB to Serial TTL Level ConverterUpgrading Legacy Peripherals to USB

Interface Microcontroller UART or I/O to USB

Interface FPGA / PLD to USB

Interface to FTDI VDRIVE2 or VMUSIC2
modules.

2.1

Replace MAX232 type level shifters allowing for
direct connection of products to PC via USB

USB Instrumentation PC interface

USB Industrial Control



USB Software / Hardware Encryption Dongles

Driver Support

Royalty free VIRTUAL COM PORT

Royalty free D2XX Direct Drivers(VCP) DRIVERS for...

(USB Drivers + DLL S/W Interface)Windows 10 32,64-bitWindows 10 32,64-bitWindows 8/8.1 32,64-bitWindows 8/8.1 32,64-bitWindows 7 32,64-bitWindows 7 32,64-bitWindows Vista and Vista 64-bitWindows Vista and Vista 64-bitWindows XP and XP 64-bitWindows XP and XP 64-bitWindows 98, 98SE, ME, 2000, Server 2003, XP,
Server 2008 and server 2012 R2

Windows 98, 98SE, ME, 2000, Server 2003, XP,
Server 2008 and server 2012 R2

Windows XP Embedded

Windows XP Embedded

Windows CE 4.2, 5.0 and 6.0

Windows CE 4.2, 5.0 and 6.0



Mac OS 8/9, OS-X

Linux 2.4 and greaterLinux 2.4 and greaterAndroid (J2xx)

The drivers listed above are all available to download for free from www.ftdichip.com Various 3rd Party
Drivers are also available for various other operating systems - see www.ftdichip.com for details.

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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2.2

Features

TTL-232R Converter Cable provides a USB to
TTL Serial interface with various end
connectors.

Support for FT232R FTDIChip-ID™ feature for
improved security.

On board FT232RQ provides single chip USB toasynchronous serial data transfer interface.

+5V or +3.3V output allows external logic to be
powered from the USB port.

Entire USB protocol handled by the electronics
in the cable USB.



6 way outputs provide Tx, Rx, RTS#, CTS#,
VCC and GND (except Audio Jack which
provides only TX,RX and GND).



Connect directly to a microcontroller UART or
I/O pins.



8 way, keyed connector to support FTDIVDRIVE2 and VMUSIC2.



UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /no parity.



3 way Audio Jack connector provides Tx, Rx
and GND.

Fully assisted hardware (RTS#/CTS#) or X-On
/ X-Off software handshaking.



Low USB bandwidth consumption.



UHCI / OHCI / EHCI host controller compatible.



Data transfer rates from 300 baud to 3 Mbaudat TTL levels.



USB 2.0 Full Speed compatible.

-40°C to +85°C operating temperature range.

Internal EEPROM with user writeable area.



Cable length is 1.80m (6 feet).



5V CMOS drive outputs and 5V safe TTL inputs
makes the TTL-232R easy to interface to 5V
MCU’s.



FCC and CE compliant.



Custom versions also available (subject to
MOQ).



FTDI’s royalty-free VCP allow forcommunication as a standard emulated COM
port and D2XX ‘direct’ drivers provide DLL
application programming interface.

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
Version 2.04
Document No.: FT_000054 Clearance No.: FTDI# 53

3 Features of FT232R applicable toTTL-232R Cables
The TTL-232R cables use FTDI’s FT232RQ USB to serial IC device. This section summarises the key
features of the FT232RQ which apply to the TTL-232R USB to serial TTL converter cables. For further
details, and a full features and enhancements description consult the FT232R datasheet, this is available
from www.ftdichip.com.
Internal EEPROM. The internal EEPROM in each cable is used to store USB Vendor ID (VID), Product ID(PID), device serial number, product description string and various other USB configuration descriptors.
Each cable is supplied with the internal EEPROM pre-programmed as described in Contact Information
Head Office – Glasgow, UK

Branch Office – Tigard, Oregon, USA

Future Technology Devices International Limited
Unit 1, 2 Seaward Place, Centurion Business Park
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758

Future Technology Devices International Limited (USA)7130 SW Fir Loop
Tigard, OR 97223-8160
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

sales1@ftdichip.com
support1@ftdichip.com
admin1@ftdichip.com

us.sales@ftdichip.com
us.support@ftdichip.com
us.admin@ftdichip.com

Branch Office – Taipei, Taiwan

Branch Office – Shanghai, China

Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan, R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8791 3576

Future Technology Devices International Limited (China)
Room 1103, No. 666 West Huaihai Road,
Shanghai, 200052
China
Tel: +86 21 62351596
Fax: +86 21 62351595

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

tw.sales1@ftdichip.com
tw.support1@ftdichip.com
tw.admin1@ftdichip.com

cn.sales@ftdichip.com
cn.support@ftdichip.com
cn.admin@ftdichip.com

Web Site
http://ftdichip.com

Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and sales
representative(s) in your country.

System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology Devices
International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level performancerequirements. All application-related information in this document (including application descriptions, suggested FTDI devices and othermaterials) is provided for reference only. While FTDI has taken care to assure it is accurate, this information is subject to customer
confirmation, and FTDI disclaims all liability for system designs and for any applications assistance provided by FTDI. Use of FTDI
devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees to defend, indemnify and holdharmless FTDI from any and all damages, claims, suits or expense resulting from such use. This document is subject to change without
notice. No freedom to use patents or other intellectual property rights is implied by the publication of this document. Neith er the whole
nor any part of the information contained in, or the product described in this document, may be adapted or reproduced in any material
or electronic form without the prior written consent of the copyright holder. Future Technology Devices International Ltd, Un it 1, 2
Seaward Place, Centurion Business Park,

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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Appendix A - Cable EEPROM Configuration. A user area of the internal EEPROM isavailable to system designers to allow storing additional data. The internal EEPROM descriptors can be
programmed in circuit, over USB without any additional voltage requirement. It can be programmedusing the FTDI utility software called FT_PROG, which can be downloaded from FTDI Utilities on the FTDI
website (www.ftdichip.com).
Lower Operating and Suspend Current. The FT232R has a low 15mA operating supply current and avery low USB suspend current of approximately 70μA. (Note that during suspend mode, the current
drawn by application should not exceed 2.5mA to remain USB compliant)
Low USB Bandwidth Consumption. The USB interface of the FT232R, and therefore the TTL-232R
cables has been designed to use as little as possible of the total USB bandwidth available from the USB
host controller.
High Output Drive Option. The UART interface I/O pins on the TTL-232R cables (RXD, TXD, RTS#, andCTS#) can be configured to use the FT232R’s high output drive option. This option allows the FT232R I/O
pins to drive up to three times the standard signal drive level. This allows multiple devices to be driven,or devices that require a greater signal drive strength to be interfaced to the cables. This option isenabled in the internal EEPROM.
UART Pin Signal Inversion. The sense of each of the eight UART signals can be individually inverted byconfiguring options in the internal EEPROM. For example CTS# (active low) can be changed to CTS(active high), or TXD can be changed to TXD#.
FTDIChip-ID™. The FT232R includes the new FTDIChip-ID™ security dongle feature. This FTDIChip-ID™
feature allows a unique number to be burnt into each cable during manufacture. This number cannot be
reprogrammed. This number is only readable over USB can be used to form the basis of a security dongle
which can be used to protect any customer application software being copied. This allows the possibilityof using the TTL-232R cables as a dongle for software licensing. Further to this, a renewable license
scheme can be implemented based on the FTDIChip-ID™ number when encrypted with other information.
This encrypted number can be stored in the user area of the FT232R internal EEPROM, and can bedecrypted, then compared with the protected FTDIChip-ID™ to verify that a license is valid. Web based
applications can be used to maintain product licensing this way. An application note, AN232R-02,
available from FTDI website (www.ftdichip.com) describes this feature.
Improved EMI Performance. The TTL-232R cables are FCC and CE certified.
Extended Operating Temperature Range - The TTL-232R cables are capable of operating over an
extended temperature range of -40º to +85º C thus allowing them to be used in automotive or industrial
applications.

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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4 TTL-232R-5V and TTL-232R-3V3 Cables
The TTL-232R-5V and TTL-232R-3V3 cables are both terminated by a 6 way, 0.1”, Single-In-Line (SIL)
connector. The difference between the two cables is that the TTL-232R-5V operates at +5V levels (signals
and power supply) and the TTL-232R-3V3 operates at +3.3V levels (signals only, VCC= +5V).

TTL-232R-5V, TTL-232R-3V3
Mechanical details

4.1

Connector

Pin

Out

and

6 pin header
0.1in pitch

VCC
GND

1

1

CTS#

2

2

VCC

3

TXD

BLACK
BROWN

3

RED

4

4

ORANGE

RXD

5

5

RTS#

6

6

CABLE 1.8m

YELLOW
GREEN

Figure 4.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out
The mechanical details of the 6 way connector are shown in the following diagram

Dimensions (mm)
A

Pin 1

B
C

E

D

A

2.54 +/- 0.05

B

12.70 +/- 0.2

C15.24 +/- 0.2

D

14.0 +/- 0.2

E2.54 +/- 0.05

Figure 4.2 TTL-232R-5V TTL-232R-3V3, 6 Way Header Mechanical Details

4.2

TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions

Header Pin

Name

Type

ColourDescription

1

GND

GND

Black

Device ground supply pin.

2

CTS#

Input

Brown

Clear to Send Control input / Handshake signal.

3

VCC

OutputRed+5V output,

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Header Pin

Name

Type

ColourDescription

4

TXD

OutputOrangeTransmit Asynchronous Data output.

5

RXD

Input

Yellow

Receive Asynchronous Data input.

6

RTS#

OutputGreen

Request To Send Control Output / Handshake signal.

NumberTable 4.1 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions

TTL-232R-5V and TTL-232R-3V3 Electrical Parameters

4.3

4.3.1 TTL-232R-5V Electrical Parameters
Parameter

Description

Minimum

TypicalMaximum

Units

Conditions
Dependant on the

VCC

Output Power
Voltage

4.25

5.0

5.25

V

USB port that theTTL-232R-5V isconnected to

IO

T

Output Power
Current

Must be less than
-

-

75

mA

2.5mA duringsuspend.

OperatingTemperature Range

-40

-

+85

oC

Table 4.2 TTL-232R-5V I/O Operating Parameters

Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

3.2

4.1

4.9

V

I source = 2mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 2mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 4.3 TTL-232R-5V I/O Pin Characteristics

4.3.2 TTL-232R-3V3 Electrical Parameters
Parameter

Description

Minimum

TypicalMaximum

Units

Conditions
Dependant on the

VCC

Output Power Voltage

4.25

5.0

5.25

V

USB port that theTTL-232R-3V3 isconnected to

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Must be less than
IO

Output Power Current

-

-

75

mA

2.5mA duringsuspend.

T

OperatingTemperature Range

-40

-

+85

oC

Table 4.4 TTL-232R-3V3 I/O Operating Parameters

Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

2.2

2.8

3.2

V

I source = 3mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 8mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 4.5 TTL-232R-3V3 I/O Pin Characteristics

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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet
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5 TTL-232R-5V-AJ and TTL-232R-3V3-AJ
The TTL-232R-5V-AJ and TTL-232R-3V3-AJ cables are both terminated by a standard 3.5mm Audio Jack
(AJ) connector. The difference between the two cables is that the TTL-232R-5V-AJ operates at +5V levels(signals and power supply) and the TTL-232R-3V3-AJ operates at +3.3V levels (signals and power
supply). On these cables the VCC power is not transferred.

5.1

TTL-232R-5V-AJ, TTL-232R-3V3-AJ Connector Pin Out andMechanical details
GND

1

BLACK

CABLE 1.8m

ORANGE TXD

4

RXD

5

YELLOW

3.5mm Audio Jack
Figure 5.1 TTL-232R-5V and TTL-232R-3V3, -AJ Pin Out

The mechanical details of the Audio Jack connector are shown in the following Figure 5.2.

3.0+/- 0.1

3.2+/- 0.1
2.6+/- 0.1

6.0+/- 0.1
3.5+/- 0.1

14.0 +/- 0.2
Dimensions in mm
Figure 5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Audio Jack Mechanical Details

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TTL-232R-5V-AJ
Descriptions

5.2

Header Pin

and

TTL-232R-3V3-AJ

Name

Type

Description

TIP

TXD

OutputTransmit Asynchronous Data output.

RING

RXD

Input

Receive Asynchronous Data input.

SLEEVE

GND

GND

GND

NumberCable

SignalTable 5.1 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions

TTL-232R-5V-AJ and TTL-232R-3V3-AJ Electrical Parameters

5.3

5.3.1 TTL-232R-5V-AJ Electrical Parameters
Parameter

IO

T

Description
Output Power
Current

Minimum

TypicalMaximum

Units

Conditions
Must be less than

-

75

mA

2.5mA duringsuspend.

OperatingTemperature Range

-40

+85

oC

Table 5.2 TTL-232R-5V-AJ I/O Operating Parameters

Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

3.2

4.1

4.9

V

I source = 6mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 6mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 5.3 TTL-232R-5V-AJ I/O Pin Characteristics

5.3.2 TTL-232R-3V3-AJ Electrical Parameters
Parameter

IO

T

Description
Output Power
Current

Minimum

TypicalMaximum

Units

Conditions
Must be less than

-

75

mA

2.5mA duringsuspend.

OperatingTemperature Range

-40

+85

oC

Table 5.4 TTL-232R-3V3-AJ I/O Operating Parameters
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Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

2.2

2.8

3.2

V

I source = 3mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 8mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 5.5 TTL-232R-3V3-AJ I/O Pin Characteristics

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6 TTL-232R-5V-WE and TTL-232R-3V3-WE Cables
The TTL-232R-5V-WE and TTL-232R-3V3-WE cables are both un-terminated; they are bare and tinned
wires. The difference between the two cables is that the TTL-232R-5V-WE operates at +5V levels (signals
and power supply) and the TTL-232R-3V3-WE operates at +3.3V levels (signals only, VCC=+5V).

6.1

TTL-232R-5V-WE,
Mechanical Details

TTL-232R-3V3-WE

Connections

andThe following Figure 6.1 shows the cable signals and the wire colours for these signals on the TTL-232R5V-WE and TTL-232R-3V3-WE cables.

VCC
GND

1

1

BLACK

CTS#

2

2

BROWN

VCC

3

3

RED

TXD

4

4

ORANGERXD

5

5

YELLOW

RTS#

6

6

GREEN

CABLE 1.8m

Figure 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Connections

Figure 6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Mechanical Details (dimensions in mm)

6.2

TTL-232R-5V-WE
Descriptions

andTTL-232R-3V3-WE

Cable

ColourName

Type

Description

Black

GND

GND

Device ground supply pin.

Brown

CTS#

Input

Clear to Send Control input / Handshake signal.

Red

VCC

Output+5V output

OrangeTXD

OutputTransmit Asynchronous Data output.

Yellow

RXD

Input

Receive Asynchronous Data input.

Green

RTS#

OutputRequest To Send Control Output / Handshake signal.

SignalTable 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions
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TTL-232R-5V-WE
Parameters

6.3

and

TTL-232R-3V3-WE

Electrical6.3.1 TTL-232R-5V-WE Electrical Parameters
Parameter

Description

Minimum

TypicalMaximum

Units

Conditions
Dependant on the

VCC

Output Power
Voltage

4.25

5.0

5.25

V

USB port that theTTL-232R-5V-WE isconnected to

IO

T

Output Power
Current

Must be less than
-

75

mA

2.5mA duringsuspend.

OperatingTemperature Range

-40

+85

oC

Table 6.2 TTL-232R-5V-WE I/O Operating Parameters

Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

3.2

4.1

4.9

V

I source = 6mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 6mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 6.3 TTL-232R-5V-WE I/O Pin Characteristics

6.3.2 TTL-232R-3V3-WE Electrical Parameters
Parameter

Description

Minimum

TypicalMaximum

Units

Conditions
Dependant on the

VCC

Output Power
Voltage

4.25

5.0

5.25

V

USB port that theTTL-232R-3V3-WE isconnected to

IO

T

Output Power
Current

Must be less than
-

75

mA

2.5mA duringsuspend.

OperatingTemperature Range

-40

+85

oC

Table 6.4 TTL-232R-3V3-WE I/O Operating Parameters
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Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

2.2

2.8

3.2

V

I source = 3mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 8mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 6.5 TTL-232R-3V3-WE I/O Pin Characteristics

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7 TTL-232R-3V3-2mm Cables
The TTL-232R-3V3-2mm cable is terminated by an 8 way, 2mm pitch, Single-In-Line (SIL) keyed
connector. The TTL-232R-3V3-2mm operates at +3.3V levels (signals and power supply). These cables
are primarily intended for interfacing the FTDI VDRIVE2 and VMUSIC2 modules.
Note that when connected to VDRIVE2 or VMUSIC2 module, the TTL-232R-3V3-2mm cable 8-way
connector pin 1 connects to pin 8 of the module, and pin 8 of the cable connects to pin 1 of the cable.

TTL-232R-3V3-2mm
details

7.1

Connector

Pin

Out

and

Mechanical

8 pin header
2mm pitch

VCC
GND

1

8

CTS#

7

VCC

6

TXD

5,1

RXD

4

RTS#

3

BLUE
2

CABLE 1.8m

KEY

3

4
5

6

7

8

GREEN

YELLOW
ORANGE
RED

BROWN
BLACK

Figure 7.1 TTL-232R-3V3-2mm, 8 Way Header Pin Out

The mechanical details of the 2mm pitch 8 way, keyed, connector are shown in the following diagram

Dimensions (mm)
B

Pin 1

A

C

A

2.00 +/- 0.005

B

14.00 +/- 0.2

C16.40 +/- 0.2

D

7.10 +/- 0.25

E

2.00 +/- 0.005

ED

Figure 7.2 TTL-232R-3V3-2mm, 2mm pitch, Keyed, 8 way Header Mechanical Details

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TTL-232R-3V3-2mm Cable Signal Descriptions

7.2

Header Pin
NumberName

Type

ColourDescription
Ring Indicator Control Input. When remote wake up

1

RI#

OutputBlue

is enabled taking RI# low (20ms active low pulse)
can be used to resume the VMUSIC2 or VDRIVE2
host controller from suspend. Connected to TXD.
This connection is keyed to connect to the VRDIVE2

2

KEY

KEY

KEY

3

RTS#

OutputGreen

Request To Send Control Output / Handshake signal.

4

RXD

Input

Yellow

Receive Asynchronous Data input.

5

TXD

OutputOrangeTransmit Asynchronous Data output.

6

VCC

OutputRed+5V output,

7

CTS#

Input

Brown

Clear to Send Control input / Handshake signal.

8

GND

GND

Black

Device ground supply pin.

or the VMUSIC2 modules

Table 7.1 TTL-232R-3V3-2mm Cable Signal Descriptions

TTL-232R-3V3-2mm Electrical Parameters

7.3

Parameter

Description

Minimum

TypicalMaximum

Units

Conditions
Dependant on the

VCC

Output Power
Voltage

4.25

5.0

5.25

V

USB port that theTTL-232R-3V3-2mm
is connected to

IO

T

Output Power
Current
OperatingTemperature Range

Must be less than
-

75

mA

2.5mA duringsuspend.

-40

+85

oC

Table 7.2 TTL-232R-3V3-2mm I/O Operating Parameters

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Parameter

Description

Minimum

TypicalMaximum

Units

Conditions

Voh

Output Voltage High

2.2

2.8

3.2

V

I source = 3mA

Vol

Output Voltage Low

0.3

0.4

0.6

V

I sink = 8mA

1.0

1.2

1.5

V

20

25

30

mV

Vin

VHys

Input SwitchingThresholdInput Switching
Hysteresis

Table 7.3 TTL-232R-3V3-2mm I/O Pin Characteristics

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8 Cable PCB Circuit Schematic
The circuit schematic for the small internal electronic circuit board, utilising the FTDI FT232R, which is
encapsulated into the USB connector end of the cable, is shown in Figure 8.1.
Customised versions of these cables are also available. Users interested in customised versions of thesecables should contact FTDI sales (sales1@ftdichip.com).

VCC-IOPULL UP RESISTORSNOT FITTED

CTS#

TXD

RXD

1

2

3

4

VCC-IO

VCC-3V3VCC

RTS#

INTERNAL IO VOLTAGE SELECTION

USB “A” PLUG

5

GND

FB

10nF

4.7uF +

USB-DM

USB-DP

47pF x 2

100nF
VCC

VCCIO

1

18

15

14

4
19

17

FT232RQ

20
24

16

26
30
270R

RTS#

TXD

RXD

270R

2

CTS#

32

8

VCC-3V3

100nF

Figure 8.1 Circuit Schematic of PCB Used in the TTL to USB Serial Converter Cables
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9 Contact Information
Head Office – Glasgow, UK

Branch Office – Tigard, Oregon, USA

Future Technology Devices International Limited
Unit 1, 2 Seaward Place, Centurion Business Park
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758

Future Technology Devices International Limited (USA)7130 SW Fir Loop
Tigard, OR 97223-8160
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

sales1@ftdichip.com
support1@ftdichip.com
admin1@ftdichip.com

us.sales@ftdichip.com
us.support@ftdichip.com
us.admin@ftdichip.com

Branch Office – Taipei, Taiwan

Branch Office – Shanghai, China

Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan, R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8791 3576

Future Technology Devices International Limited (China)
Room 1103, No. 666 West Huaihai Road,
Shanghai, 200052
China
Tel: +86 21 62351596
Fax: +86 21 62351595

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

tw.sales1@ftdichip.com
tw.support1@ftdichip.com
tw.admin1@ftdichip.com

cn.sales@ftdichip.com
cn.support@ftdichip.com
cn.admin@ftdichip.com

Web Site
http://ftdichip.com

Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and sales
representative(s) in your country.

System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology Devices
International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level performancerequirements. All application-related information in this document (including application descriptions, suggested FTDI devices and othermaterials) is provided for reference only. While FTDI has taken care to assure it is accurate, this information is subject to customer
confirmation, and FTDI disclaims all liability for system designs and for any applications assistance provided by FTDI. Use of FTDI
devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees to defend, indemnify and holdharmless FTDI from any and all damages, claims, suits or expense resulting from such use. This document is subject to change without
notice. No freedom to use patents or other intellectual property rights is implied by the publication of this document. Neith er the whole
nor any part of the information contained in, or the product described in this document, may be adapted or reproduced in any material
or electronic form without the prior written consent of the copyright holder. Future Technology Devices International Ltd, Un it 1, 2
Seaward Place, Centurion Business Park,

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Appendix A - Cable EEPROM Configuration
Each TTL-232R cable is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM whichcontains the USB configuration descriptors for that device. When the cable is plugged into a PC or a USB
reset is performed, the PC will read these descriptors. The default values stored into the internal EEPROM
are defined in the table given below –Parameter

Value

Notes

USB Vendor ID (VID)

0403h

FTDI default VID (hex)

USB Product UD (PID)

6001h

FTDI default PID (hex)Serial Number Enabled?

Yes
A unique serial number is generated andSerial Number

See Note

programmed into the EEPROM during device final
test.
Enabling this option will make the device pull down

Pull down I/O Pins in USB
Suspend
Manufacturer Name

Disabled

on the UART interface lines when the power is shutoff (PWREN# is high).

FTDI
Product description depends on the cable. The
following lists the Product description for eachdifferent cable.
TTL-232R-5V
TTL-232R-3V3

Product Description

See note

TTL-232R-5V-AJ
TTL-232R-AJ-3V3
TTL-232R-5V-WE
TTL-232R-3V3-WE
TTL-232R-3V3-2mm = USB <-> Serial Cable

Max Bus Power Current

90mA

Power Source

Bus Powered

Device TypeFT232R
Returns USB 2.0 device description to the host.
Note: The device is be a USB 2.0 Full Speed device

USB Version

0200(12Mb/s) as opposed to a USB 2.0 High Speed
device (480Mb/s).

Remote Wake Up

Disabled

High Current I/Os

EnabledLoad VCP Driver

EnabledEnables the high drive level on the UART and CBUS
I/O pins.
Makes the device load the VCP driver interface forthe device.

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Parameter

Value

Notes

Invert TXDDisabled

Signal on this pin becomes TXD# if enable.

Invert RXD

Disabled

Signal on this pin becomes RXD# if enable.

Invert RTS#

Disabled

Signal on this pin becomes RTS if enable.

Invert CTS#Disabled

Signal on this pin becomes CTS if enable.

Table 0.1 Default Internal EEPROM Configuration
The internal EEPROM in the cable can be re-programmed over USB using the utility program FT_PROG.
FT_PROG can be downloaded from the www.ftdichip.com. Version 2.8a or later is required for the FT232R
chip. Users who do not have their own USB Vendor ID but who would like to use a unique Product ID intheir design can apply to FTDI for a free block of unique PIDs. Contact FTDI support for this service.

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Appendix B - References
Document References
FT232R USB UART IC Datasheet

Acronyms and Abbreviations
Terms

Description

DLL

Dynamic Link Library

EHCI

Enhanced Host Controller Interface

EEPROM
FPGA

Electrically Erasable Programmable Read Only Memory
Field Programmable Gate ArrayIC

Integrated Circuit

MCU

Microcontroller Unit

RoHS

Restriction of Hazardous Substance

SIL

Single In LineOHCIOpen Host Controller Interface

PLD

Programmable Logic Device

TTL

Transistor-Transistor Logic

USB

Universal Serial Bus

UART

Universal Asynchronous Receiver/Transmitter

UHCI

Universal Host Controller Interface

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Appendix C - List of Figures and Tables
List of Figures
Figure 1.1 Using the TTL-232R Cable .............................................................................................. 2
Figure 4.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out .................................................. 11
Figure 4.2 TTL-232R-5V TTL-232R-3V3, 6 Way Header Mechanical Details ......................................... 11
Figure 5.1 TTL-232R-5V and TTL-232R-3V3, -AJ Pin Out .................................................................. 14
Figure 5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Audio Jack Mechanical Details ................................ 14
Figure 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Connections ...................................................... 17
Figure 6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Mechanical Details (dimensions in mm) ................ 17
Figure 7.1 TTL-232R-3V3-2mm, 8 Way Header Pin Out ................................................................... 20
Figure 7.2 TTL-232R-3V3-2mm, 2mm pitch, Keyed, 8 way Header Mechanical Details ......................... 20
Figure 8.1 Circuit Schematic of PCB Used in the TTL to USB Serial Converter Cables ........................... 23

List of Tables
Table 1.1 TTL-232R Cables Descriptions and Part Numbers ................................................................ 3
Table 4.1 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions ................................................ 12
Table 4.2 TTL-232R-5V I/O Operating Parameters .......................................................................... 12
Table 4.3 TTL-232R-5V I/O Pin Characteristics ............................................................................... 12
Table 4.4 TTL-232R-3V3 I/O Operating Parameters......................................................................... 13
Table 4.5 TTL-232R-3V3 I/O Pin Characteristics.............................................................................. 13
Table 5.1 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions ....................................... 15
Table 5.2 TTL-232R-5V-AJ I/O Operating Parameters ...................................................................... 15
Table 5.3 TTL-232R-5V-AJ I/O Pin Characteristics ........................................................................... 15
Table 5.4 TTL-232R-3V3-AJ I/O Operating Parameters .................................................................... 15
Table 5.5 TTL-232R-3V3-AJ I/O Pin Characteristics ......................................................................... 16
Table 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions .................................... 17
Table 6.2 TTL-232R-5V-WE I/O Operating Parameters ..................................................................... 18
Table 6.3 TTL-232R-5V-WE I/O Pin Characteristics.......................................................................... 18
Table 6.4 TTL-232R-3V3-WE I/O Operating Parameters ................................................................... 18
Table 6.5 TTL-232R-3V3-WE I/O Pin Characteristics ........................................................................ 19
Table 7.1 TTL-232R-3V3-2mm Cable Signal Descriptions ................................................................. 21
Table 7.2 TTL-232R-3V3-2mm I/O Operating Parameters ................................................................ 21
Table 7.3 TTL-232R-3V3-2mm I/O Pin Characteristics ..................................................................... 22
Table 0.1 Default Internal EEPROM Configuration............................................................................ 26

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Appendix D - Revision History
Document Title:

TTL-232R TTL to USB Serial Converter Range of Cables Datasheet

Document Reference No.:

FT_000054

Clearance No.:

FTDI# 53

Product Page:

http://www.ftdichip.com/FTProducts.htm

Document Feedback:Send Feedback

Revision

Changes

Date

Version 1.00

Full datasheet released

2006-05-01

Consolidated all TTL-232R variants into one
Version 2.00

datasheet.

2008-07-10

Changed part numbers for +5V cables.
Version 2.01

Corrected Table 6.1, RED wire VCC description

2008-09-01

Corrected Table 4.3, I source and I sink values.
Added section 1.3 USB Compliant Logo.
Version 2.02

2010-09-02
Updated contact details.
Replaced reference MProg with FT_Prog
Corrected title of fig 5.1.

Version 2.03

Removed colour column from table 5.1 – cables

2011-06-02

are encapsulated and not visible.
Corrected Table 5.1.
Version 2.04

2019-02-14
Further document template changes made.

Copyright © Future Technology Devices International Limited29