CWDM SFP Series
GC1XX0-SFP-LC. 41dB/(WT)Single-Mode CWDM SFP 1.25Gbps FC/GBE
Duplex SFP Transceiver
RoHS6 Compliant

Features

Operating Data Rate up to 1.25Gbps



18-Wavelength CWDM DFB LD Transmitter from
1270nm to 1610nm, with Step 20nm

Single 3.3V Power Supply and TTL Control Logic
Interface

Hot-Pluggable SFP Footprint Duplex LC Connector

Applications

InterfaceClass 1 FDA and IEC60825-1 Laser Safety CompliantOperating Case TemperatureStandard: 0℃~+70℃

Gigabit Ethernet Switches andRouters



Fiber Channel Switch Infrastructure

Other Optical Link

Extended: -20℃~+85℃
Compliant with SFP MSA SpecificationCompliant with SFF-8472 Digital Diagnostic Monitor
Interface

Ordering Information
Part No.

Data
Rate

Fiber

Link
BudgetGCxxxx-SFP-LC.41dB

1.25Gbps

SMF

41dB

LC

Standard

YES

GCxxxx-SFP-LC.41dB(WT) 1.25Gbps

SMF

41dB

LC

Extended

YESInterface Temperature DDMI

Note1: Standard version, X refer to CWDM Wavelength range 1270nm to 1610nm;*The product image only for reference purpose.

Data Controls Inc.
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CWDM SFP Series
CWDM*NOTE2 Wavelength
Model Name：GCxxxx-SFP-LC41dB
Band

O-band Original

E-band Extended

S-band Short
Wavelength
C-band Conventional
L-bandLong Wavelength

Wavelength(nm)
Min.
1264

Typ.
xxxx
1270

Max.
1277.51284

1290

1297.51304

1310

1317.51324

1330

1337.51344

1350

1357.51364

1370

1377.51384

1390

1397.51404

1410

1417.51424

1430

1437.51444

1450

1457.51464

1470

1477.51484

1490

1497.51504

1510

1517.51524

1530

1537.51544

1550

1557.51564

1570

1577.51584

1590

1597.51604

1610

1617.5Note2: Wavelengths from 1270 nm to 1610 nm, with 20 nm span. Please contact Data Controls Inc. toconfirm thewavelength availability.

Data Controls Inc.
Page 2 of 12

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CWDM SFP Series
Regulatory Compliance*Note3
Product Certificate

Certificate Number

Applicable Standard
EN 60950-1:2006+A11+A1+A12+A2

TUV

R50135086

EN 60825-1:2014
EN 60825-2:2004+A1+A2

UL

E317337

EMC CEAE 50384190 0001

‘FCC
FDA
ROHS

WTF14F0514417E//

UL 60950-1
CSA C22.2 No. 60950-1-07
EN 55032:2012
EN 55032:2015
EN 55024:2010
EN 55024:2010+A1
47 CFR PART 15 OCT., 2013
CDRH 1040.10
2011/65/EU

Note3: The above certificate number updated to June 2018, because some certificate will be updated every year,
such as FDA and ROHS. For the latest certification information, please check with Data Controls Inc..

Product Description
GC1XX0-SFP-LC.41dB single mode transceiver is small form factor pluggable module for duplex
optical data communications such as Gigabit Ethernet 1000BASE-ZX and Fiber Channel 1x SMLC-L FC-PI. It is with the SFP 20-pin connector to allow hot plug capability.
This module is designed for single mode fiber and operates at a nominal wavelength of CWDM
wavelength. There are eighteen center wavelengths available from 1270nm to 1610nm, with eachstep 20nm.
The transmitter section uses a multiple quantum well CWDM DFB laser and is a class 1 laser
compliant according to International Safety Standard IEC-60825. The receiver section uses anintegrated InGaAs detector preamplifier (IDP) mounted in an optical header and a limiting postamplifier IC.

Absolute Maximum Ratings*
Parameter

Symbol

Min.

Max.

Unit

Storage Temperature

Ts

-40

+85

°C

Supply Voltage

Vcc

-0.5

3.6

V

-

95

%

Operating Relative Humidity*Exceeding any one of these values may destroy the device immediately.

Data Controls Inc.
Page 3 of 12

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CWDM SFP Series
Recommended Operating Conditions
Parameter

SymbolOperating CaseTemperature Tc

Min. Typical Max.

GC1XX0-SFP-LC.SXX

0

-

+70

GC1XX0-SFP-LC.SXX(WT)

-20

-

+85

Unit
°C

Power Supply Voltage

Vcc

3.15

3.3

3.45

V

Power Supply Current

Icc

-

-

300

mA

-

1.25
1.063

-

Gbps

GBE
FC

Date Rate

Performance Specifications – ElectricalParameter

SymbolLVPECL
Inputs(Differential)

Vin

400

Input Impedance(Differential)

Zin

TX_DisTX_FAULTMin.
Typ.
Transmitter

Max

Unit

Notes

-

2000

mVpp

AC coupled
inputs*(Note6)

85

100

115

ohm

Rin > 100kohm @ DC

Disable2-

Vcc+0.3

Enable

0

-

0.8

Fault

2

-

Vcc+0.3

Normal

0

-

0.8

V
V

Receiver
LVPECL Outputs(Differential)

Vout

Output Impedance(Differential)

Zout

RX_LOS

400

-

2000

mVpp

)

85

100

115

ohm

LOS

2

-

Vcc+0.3

V

Normal

0

-

0.8

V

VoH

2.5

-

-

V

VoL

0

-

0.5

V

MOD_DEF ( 0:2 )AC coupled
outputs*(Note6

With Serial
ID

Optical and Electrical Characteristics(GC1XX0-SFP-LC.41dB,CWDM DFB and APD, 41dB)
Parameter
SymbolMin.
Typical

Max.

Unit

Link Budget

41

-

-

dB

Data Rate-

1.063/1.25

-

Gbps

Transmitter
Center Wavelength

λc

λc–6

λc

λc+7.5nm

Spectral Width (-20dB)

∆λ

-

-

1

nm

Average Output Power*(Note4)

Pout

4

-

7

dBm

Side Mode Suppression Ratio

SMSR

30

-

-

dB

Data Controls Inc.
Page 4 of 12

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CWDM SFP Series
Extinction Ratio*(Note5)

ER

8.2

-

-

dB

Rise/Fall Time(20%～80%)

tr/tf

-

-

0.26

ns

Total Jitter

TJ

-

-

56.5

ps

Output Optical Eye*(Note5)

Compatible with IEEE 802.3ah-2004*(Note9)

TX_Disable Assert Time

t_off

-

-

10

us

Pout@TX Disable Asserted

Pout

-

-

-45

dBm

ReceiverCenter Wavelength

λc

1260

-

1620

nm

Receiver Sensitivity*(Note7)

Pmin

-

-

-37

dBm

Receiver Overload

Pmax

-10

-

-

dBm

Return Loss

12

-

-

dB

Optical Path Penalty*(Note8)

-

-

1

dB

LOS De-Assert

LOSD

-

-

-38

dBm

LOS Assert

LOSA

-50

-

-

dBm

0.5

-

-

dB

LOS Hysteresis*(Note10)
Note4: Output is coupled into a 9/125μm single-mode fiber.

Note5: Filtered, measured with a PRBS 27-1 test pattern @1.25Gbps
Note6: LVPECL logic, internally AC coupled.
Note7: Minimum average optical power measured at BER less than 1E-12, with a 27-1 PRBS and ER=9dB.
Note8: Measured with a PRBS 27-1 test pattern @1.25Gbps, BER ≤1×10-12.
Note9: Eye Pattern Mask

Note10: LOS Hysteresis

Data Controls Inc.
Page 5 of 12

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CWDM SFP Series
Functional Description of Transceiver

SFP Transceiver Electrical Pad Layout

Data Controls Inc.
Page 6 of 12

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CWDM SFP Series
Pin Function Definitions
Pin
Num.

Name

Function

Plug
Seq.

Notes

1

VeeT

Transmitter Ground

1

5)

2

TX Fault

Transmitter Fault
Indication

3

1)

3

TX Disable

Transmitter Disable

32) Module disables on high or
open

4

MOD-DEF2

Module Definition 2

33) 2 wire serial ID interface.

5

MOD-DEF1

Module Definition 1

33) 2 wire serial ID interface.

6

MOD-DEF0

Module Definition 033) Grounded within themodule.

7

Rate SelectNot Connect3

Function not available

8

LOS

Loss of Signal

3

4)

9

VeeR

Receiver Ground

1

5)

10

VeeR

Receiver Ground

1

5)

11

VeeR

Receiver Ground

1

5)

12

RD-

Inv. Received Data Out

3

6)

13

RD+

Received Data Out

3

6)

14

VeeR

Receiver Ground

1

5)

15

VccR

Receiver Power27) 3.3 ± 5%

16

VccT

Transmitter Power27) 3.3 ± 5%

17

VeeT

Transmitter Ground

1

5)

18

TD+

Transmit Data In

3

8)

19

TD-

Inv. Transmit Data In

3

8)

20

VeeT

Transmitter Ground1

5)

Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ
resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output
indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output
will be pulled to < 0.8V.
2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up
within the module with a 4.7 – 10 KΩ resistor. Its states are:
Low (0 – 0.8V): Transmitter on(>0.8, < 2.0V): UndefinedHigh (2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K –10K
resistor on the host board. The pull-up voltage shall be VccT or VccR .
Data Controls Inc.
Page 7 of 12

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CWDM SFP Series
Mod-Def 0 is grounded by the module to indicate that the module is present
Mod-Def 1 is the clock line of two wire serial interface for serial ID
Mod-Def 2 is the data line of two wire serial interface for serial ID
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K –10KΩ resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicatesthe received optical power is below the worst-case receiver sensitivity (as defined by the standard
in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
5) VeeR and VeeT may be internally connected within the SFP module.
6) RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines
which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done
inside the module and is thus not required on the host board. The voltage swing on these lines
will be between 400 and 2000mV differential (200 –1000mV single ended) when properly
terminated.
7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V
±5% at the SFP connector pin. Maximum supply current is 300mA. Recommended host board
power supply filtering is shown below. Inductors with DC resistance of less than 1 ohm should be
used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. Whenthe recommended supply-filtering network is used, hot plugging of the SFP transceiver module
will result in an inrush current of no more than 30mA greater than the steady state value.VccRand VccT may be internally connected within the SFP transceiver module.
8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with100Ω differential termination inside the module. The AC coupling is done inside the module andis thus not required on the host board. The inputs will accept differential swings of 400 – 2000mV(200 – 1000mV single-ended).

EEPROM
The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the ATMEL
AT24C02/04 family of components. When the serial protocol is activated, the host generates theserial clock signal (SCL). The positive edge clocks data into those segments of the EEPROM thatare not write protected within the SFP transceiver. The negative edge clocks data from the SFP
transceiver. The serial data signal (SDA) is bi-directional for serial data transfer. The host uses
SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories
are organized as a series of 8-bit data words that can be addressed individually or sequentially.
The Module provides diagnostic information about the present operating conditions. The
transceiver generates this diagnostic data by digitization of internal analog signals. Calibration
and alarm/warning threshold data is written during device manufacture. Received powermonitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring andtemperature monitoring all are implemented. If the module is defined as external calibrated, theData Controls Inc.
Page 8 of 12

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CWDM SFP Series
diagnostic data are raw A/D values and must be converted to real world units using calibration
constants stored in EEPROM locations 56 – 95 at wire serial bus address A2H. The digital
diagnostic memory map specific data field define as following .For detail EEPROM information,please refer to the related document of SFF 8472 Rev 9.3.

EEPROM Serial ID Memory Contents
Accessing Serial ID Memory uses the 2 wire address 1010000X(A0H). Memory Contents ofSerial ID are shown in Table 1. The following information is according to GC1XX0-SFPLC.SXX.

Table 1 Serial ID Memory Contents
Addr.

Size
(Bytes)Name of Field

Hex

Description

BASE ID FIELDS
01

Identifier

03

SFP

1

1

Ext. Identifier04

SFP function is defined byserial ID only2

1

Connector

07

LC Connector

3-10

8

TransceiverXX XX XX XX XX XX
XX XX(note11)

Transmitter Code

11

1

Encoding

01

8B10B

12

1

BR, Nominal

0D

1.25Gbps

13

1

Reserved

00

14

1

Length (9µm)km

XX

15

1

Length(9µm)100m

XX

16

1

Length (50µm) 10m

XX

17

1

Length(62.5µm)10m

XX

18

1

Length (Copper)

00

19

1

Reserved

00

Data Controls Inc.
Page 9 of 12

Transceiver transmit
distance
Not compliant
V4.lCWDM SFP Series
Note11: The “xx” byte should be filled in according to practical case. For more information, please refer to therelated document of SFP Multi-Source Agreement (MSA).

20-35

16

Vendor name

XX XX XX XX XX XX
XX XX XX XX XX XX
XX XX XX XX(note11)

36

1

Reserved

00

37-39

3

Vendor OUI

00 00 00

Vendor name

40-55

16

Vendor PN

XX XX XX XX XX XX
XX XX XX XX XX XX Transceiver part number
XX XX XX XX(note11)

56-59

4

Vendor rev

XX XX XX XX(note11)

60-61

2

Wavelength

XX XX(note11)

62

1

Reserved

00

63

1

CC_BASE

Check Sum
(Variable)

Wavelength
Check code for Base ID
FieldsEXTENDED ID FIELDS
64-65

2

Options

00 1A

66

1

BR, max00

67

1

BR, min00

Vendor SN

XX XX XX XXXX XX
XX XX 20 20 20 20

68-83

16

20 20 20 20(Note10)
XX XX XX XX XX XX
XX XX(Note10)

TX_DISABLE, TX_FAULT
and Loss of Signal
implemented.

Serial Number oftransceiver (ASCII). For
example “B000822”.
Manufactory date code.
For example “080405”.

84-91

8

Date code92

1

Diagnostic
Monitoring TypeXX(Note10)

Digital diagnostic
monitoring implemented

93

1

Enhanced Options

XX(Note10)

Optional flags

941

SFF_8472
Compliance

XX(Note10)

01 for Rev9.3 SFF-8472.

951

CC_EXT

Check Sum
(Variable)

Check sum for Extended ID
Field.

VENDOR SPECIFIC ID FIELDS
96-12732

Vendor Specific

Read only

128-255

128

Reserved

Read only

Data Controls Inc.
Page 10 of 12

Depends on customer
information

V4.l

CWDM SFP Series
Recommend Circuit Schematic

Mechanical Specifications*This 2D drawing only for reference, please check with Data Controls Inc. before ordering.
Data Controls Inc.
Page 11 of 12

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CWDM SFP Series
Laser Emission Data
Wavelength>1260nm

Total output power (as defined by FDA: 7mm aperture at 20cm distance)<0.79Mw

Total output power (as defined by IEC: 7mm aperture at 10cm distance)<10Mw

Beam divergence12.5°

Laser Emission

Obtaining Document
You can visit our website: https://www.dci.jp/
Or contact Data Controls Inc. Listed at the end of the documentation to get the latest documents.

Revision History
Revision
V3.a
V3.b
V3.c
V3.d
V4.a
V4.b
V4.c
V4.d
V4.e
V4.f
V4.g
V4.h
V4.i
V4.j
V4.k
V4.l

Revision History
Release Date
Released.
Sep 26, 2009
Correct the PN in ordering information.
Sep 27, 2009
Complete the CWDM wavelength & change logo.
Jan 20, 2010
Updated PN.
January 18, 2011
Update LOGO.
August 13, 2011
Update temp. range.
Sep 21, 2011
Update temp. range.
June 18，,2012
Update pin definition notes
Jan 31,2013
Update the range of RX wavelength.
May 9，,213
Update regulatory compliance, LOSA&LOSDand the tolerances of mechanicalMar 20,2015
spec.
Mar 20,2015
Add the 1625nm wavelength.
Mar 27,2015
Update the Tx Power, Rx sensitivity and LOSD of the34dB products.
Add 38dB budget. Update theregulatory compliance,
Oct 13,2017
2D drawing and the contact information.
Update the picture and 2D drawing.
March 27, 2018
Deleted the 1625nm wavelength.
June 5, 2018
Update the regulatory compliance and 2D drawing.
June 28, 2018

Notice:Data Controls Inc. reserves the right to make changes to or discontinue any optical link productor service identified in this publication, without notice, in order to improve design and/or
performance. Applications that are described herein for any of the optical link products are forillustrative purposes only. Data Controls Inc. makes no representation or warranty that suchapplications will be suitable for the specified use without further testing or modification.

Contact:
Data Controls Inc. https://www.dci.jp/
Email：info@dci.jp
Data Controls Inc.
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