RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985Features
 Compliant with SONET/SDH standard Compliant with Fast Ethernet standard
 Industry standard small form pluggable (SFP)
package Simplex LC connector
 Differential LVPECL inputs and outputs
 Single power supply 3.3V
 TTL signal detect indicator Hot Pluggable Class 1 laser product complies with EN 60825-1

Ordering InformationPART NUMBER

TX/RX

TEMPERATURE

LD TypeDistance

DB1310-SFP-LC.S20

1310/1550

0C to 70 C1310 FP

20km

DB1310-SFP-LC.S20(WT)

1310/1550-40 C to 85 C1310 FP

20km

Diagnostics
Parameter

Range

Accuracy

Unit

Temperature-40 to 95±3oVoltage

3.0 to 3.6

± 0.1

V

Bias Current

0 to 100±5mA

TX Power-17 to -5± 3 dBdBm

RX Power-31 to –8± 3 dBdBm

Page 1 of 9
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Date:4/16/2013

Calibration

CWebsite: www.dci.jp

External

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985

Absolute Maximum Ratings
PARAMETERSYMBOL

MIN

MAX

UNITS

NOTE

Storage TemperatureTS4085

C

Supply Voltage

Vcc

0.5

4.0

V

Input Voltage

VIN

0.5

Vcc

V

Output Current

Io

---

50mA

Operating Current

IOP

---

400mA

SYMBOL

MIN

MAX

UNITS

TC

070

C

DB1310-SFP-LC.S20-4085

CDB1310-SFP-LC.S20(WT)

Recommended Operating Conditions
PARAMETER
Case Operating Temperature

Supply Voltage

Vcc

3.1

3.5V

Supply Current

ITX + IRX---200mA

Page 2 of 9
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Date:4/16/2013

Website: www.dci.jp

NOTE

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.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.

MAXUNITSNOTEPout14---8dBm

AverageExtinction Ratio

ER

8.2------dB

Center Wavelength

C

1261

1310

1360

nm

Spectral Width (RMS)------

4nm

Rise/Fall Time (1090%)

Tr, f---

12nsOutput Optical Power
9/125 m fiber

Output 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

VTransmit Fault Output-High

TX_FAULTH

2.4---VCC

V

Time to initialize, include reset ofTX_FAULT

t_init

---

---

300

ms

TX_FAULT from fault to assertiont_fault------100

s

TX_DISABLE time to start resett_reset10------

sPage 3 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.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

---

---

32

dBm

PRBS23, BER < 1010RX Sensitivity @125Mbps

PI N------

32dBmPRBS7, 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-Asserted

PA---

---

32dBmLoss of signal-DeassertedPD45------dBmDifferential Output Voltage

VDI FF

0.5---

1.2

VRX_LOS L0---0.5

V

RX_LOS H

2.4---VCC

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

Page 4 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985

Block Diagram of Transceiver

DATADATA/LD Drive&LDFault Sense

TX_DISABLE
TX_FAULTPRE.
AMPLIFIER
IC(0)
(1)

PD

WDM Filter

MOD_DEF(2)

OPTICALDATA

SUB-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_FAULT
When 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 bythe system for the diagnostic purpose. The signal is operated in TTL level.

Page 5 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985

Dimensions

DIMENSIONS ARE IN MILLIMETERSALL DIMENSIONS ARE 0.2mm UNLESS OTHERWISE SPECIFIED

Page 6 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985

SFP host board mechanical layout

XYS XYA
1

LX A S
1PIN1

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 SAS B S

Unit: mm

Page 7 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.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: mm

Page 8 of 9
Version 2.0
Date:4/16/2013

Website: www.dci.jp

RoHS Compliant
TX-1310/RX-1550 nm Single-mode Bi-directional (18dB margin)
SFP LC Simplex Connector, with Diagnostic Monitoring
155 Mbps SONET OC-3/SDH STM-1/125 Mbps Fast
Ethernet/100Base-BX10-U/ITU-T G.985

Pin Assignment
Pin-Out

Pin

PIN 11

PIN 20

PIN 10

PIN 1

Signal Name

Description

1

TGND

Transmit Ground

234

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

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

VCCTTGND

18Transmit Data, Differential PECL, ac coupled
TX
19Transmit Data Bar, Differential PECL, ac coupled
TX
TGND
20Transmitter Ground
Note : All information contained in this document is subject to change without notice.

Page 9 of 9
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Website: www.dci.jp