RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Features SONET/SDH application
 Fast Ethernet application
 Industry standard small form pluggable (SFP)
package Simplex LC connector
 Differential inputs and outputs
 Single power supply 3.3V
 TTL signal detect indicator Hot Pluggable Class 1 laser product complies with EN 60825-1

Ordering Information
PART NUMBER

TX/RX

TEMPERATURELD TypeDistance

DB1310-SFP-LC.S40

1310/1550

0C to 70 C1310 FP

40km

DB1310-SFP-LC.S40(WT)

1310/1550-40 C to 85 C1310 FP

40km

Diagnostics
Parameter

Range

Accuracy

Unit

Temperature-40 to 95±3oVoltage

3.0 to 3.6

± 0.1

V

Bias Current

0 to 100± 10%mATX Power-11 to +3± 3 dB

dBm

RX Power-31 to –8± 3 dB

dBm

Page 1 of 10
Version 2.1
Date:4/16/2013

Calibration

CWebsite: www.dci.jp

External

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985
Absolute Maximum Ratings
PARAMETERSYMBOL

MIN

MAX

UNITS

Storage TemperatureTS4085

C

Supply Voltage

Vcc

0.5

4.0

V

Input Voltage

VIN

0.5VccV

SYMBOL

MIN

MAX

UNITS

NOTE

Recommended Operating Conditions
PARAMETER
Case Operating Temperature

TC070

C-4085

CDB1310-SFP-LC.S40(WT)

Supply Voltage

Vcc

3.1

3.5

V

Supply Current

ITX + IRX---220mA

Page 2 of 10
Version 2.1
Date:4/16/2013NOTE
DB1310-SFP-LC.S40

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985
Transmitter Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0 C to 70 C (-40 C to 85 C)
PARAMETERSYMBOLMIN

TYP.

MAXUNITS

NOTE

Pout

8---0dBm

Average

Extinction Ratio

ER9------dB

Center WavelengthC12611310

1360

nm

Spectral Width (RMS)------

2.5

nmRise/Fall Time (1090%)

Tr, f---

12nsOutput Optical Power
9/125 m fiberOutput Eye

Compliant with Telcordia GR-253-CORE Issue 3 and ITU-T recommendation G-957

Max. Pout TX-DISABLE Asserted

POFF------

45

dBm

Differential Input Voltage

VDI FF

0.4---

2.0

V

Transmit Fault Output-Low

TX_FAULTL

0.0---

0.5

V

Transmit Fault Output-High

TX_FAULTH

2.4---VCC

V

Time to initialize, include reset ofTX_FAULTt_init------300

msTX_FAULT from fault to assertiont_fault------100

s

TX_DISABLE time to start resett_reset10------s

Page 3 of 10
Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Receiver Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0 C to 70 C (-40 C to 85 C)
PARAMETERSYMBOLMIN

TYP.

MAXUNITS

NOTE

Optical Input Power-maximum

PI N0------dBm

BER < 1010RX Sensitivity @OC-3

PI N------

34dBmPRBS23, BER < 1010RX Sensitivity @125Mbps

PI N------

34dBmPRBS7, BER < 1010

Operating Center WavelengthC1480---1600nm

Optical Return Loss

ORL

14---

---

dB

=1480~1600nm

Optical isolation

ISO---

---

-45

dB

=1260~1360nm

Loss of signal-Deasserted

PD

---

---

34

dBm

Loss of signal-AssertedPA45------

dBm

Differential Output Voltage

VDI FF

0.5

---

1.2

V

RX_LOS L0---0.5

VRX_LOS H

2.4---VCCV

Receiver Loss of Signal Output
Voltage-Low
Receiver Loss of Signal Output
Voltage-High

Page 4 of 10
Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Block Diagram of Transceiver

DATA
DATA/

LD Drive&LD

Fault Sense

TX_DISABLE
TX_FAULTPRE.
AMPLIFIER
IC(0)
(1)

PD

WDM Filter

MOD_DEF(2)OPTICALDATASUB-ASSEMBLIESPOST-Amp

DATA/&LOS Detect

RX_LOSTransmitter and Receiver Optical Sub-assembly Section
A 1310 nm InGaAsP laser and an InGaAs PIN photodiode integrate with an WDM filter to form a bi-directional single fiber
optical subassembly (OSA). The laser of OSA is driven by a LD driver IC which converts differential input LVPECL logic
signals into an analog laser driving current. And, The photodiode of OSA is connected to a circuit providing post-amplification
quantization, and optical signal detection.
TX_FAULTWhen sensing an improper power level in the laser driver, the SFP set this signal high and turns off the Laser. TX_FAULT can bereset with the TX_DISABLE line. The signal is in TTL level.
TX_DISABLE
The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output.
Receive Loss (RX_LOS)The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by
the system for the diagnostic purpose. The signal is operated in TTL level.

Page 5 of 10
Version 2.1Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Dimensions

DIMENSIONS ARE IN MILLIMETERSALL DIMENSIONS ARE 0.2mm UNLESS OTHERWISE SPECIFIED

Page 6 of 10
Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/100Base-BX10-U/ITU-TG.985

SFP host board mechanical layout

XYS XYA1

LX A S1PIN1

LX A SLEGEND

AS B S

1. PADS AND VIAS ARE CHASSIS GROUND
2. THROUGH HOLES, PLATING OPTIONAL
3. HATCHED AREA DENOTES COMPONENTAND TRACE KEEPOUT(EXCEPT CHASSISGROUND)
4.AREA DENOTES COMPONENT KEEPOUT(TRACES ALLOWED)PIN1DIMENSIONS ARE IN MILLIMETERSA S B S
AS B S

Unit: mmPage 7 of 10Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Assembly drawing
1.7±0.9
3.5±0.3
41.73±0.5
PCB15.25±0.1

10.4±0.1

11.0 REF.

9.8 MAXCAGE ASSEMBLY

0.4±0.1 BELOW PCB

15.0 MAX

BEZEL

16.25±0.1
MSA-SPECIFIED BEZELPCBDIMENSIONS ARE IN MILLIMETERS

Unit: mmPage 8 of 10Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Pin Assignment
Pin-Out

Pin

PIN 11

PIN 20

PIN 10

PIN 1Signal Name

Description

1

TGND

Transmit Ground

23
4

TX_FAULTTX_DISABLE
MOD_DEF (2)Transmit Fault
Transmit Disable
SDA Serial Data Signal

5

MOD_DEF (1)SCL Serial Clock Signal

67

MOD_DEF (0)RATE SELECTTTL Low
Open Circuit

891011RX_LOS
RGND
RGND
RGND

Receiver Loss of Signal, TTL High, open collector
Receiver Ground
Receiver Ground
Receiver Ground121314151617RX
RX
RGND
VCCR
VCCTTGND

Receive Data Bar, Differential PECL, ac coupled
Receive Data, Differential PECL, ac coupled
Receiver Ground
Receiver Power Supply
Transmitter Power Supply
Transmitter Ground

181920TX
TX
TGND

Transmit Data, Differential PCEL, ac coupled
Transmit Data Bar, Differential PCEL, ac coupled
Transmitter Ground

Page 9 of 10
Version 2.1
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (26dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast Ethernet/
100Base-BX10-U/ITU-TG.985

Eye Safety MarkThe DB1310-SFP-LC.S40 singlemode transceiver is aclass 1 laser product. It complies with EN 60825-1 andFDA 21 CFR 1040.10 and 1040.11. In order to meetlaser safety requirements the transceiver shall be
operated within the Absolute Maximum Ratings.

Required MarkClass 1 Laser ProductComplies with
21 CFR 1040.10 and 1040.11

CautionAll adjustments have been done at the factory before
the shipment of the devices. No maintenance and user
serviceable part is required. Tampering with andmodifying the performance of the device will result in
voided product warranty.
Note : All information contained in this document is subject to change without notice.

Page 10 of 10
Version 2.1
Date:4/16/2013

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