Product Features
● 1310/ 1510 DFB Laser Diode with MQW Structure
● InGaAs PIN-TIA Photodiode Receiver
● Reach 20 km Transmission Distance on 9/125μm SMF
● DUAL Single Mode Transceiver SFP Footprint LC Optical Interface
● Compliant With SFP MSA and SFF-8472
● Digital Diagnostic Monitoring Interface
● Single +3.3V Power Supply
● CML Differential Inputs and Outputs
● LVTTL Signal Detection Output
● Compliant With ITU-T G.957
● Compliant With RoHS and Lead Free
● Metal Enclosure for Lower EMI
● Operating Case Temperature:
      Standard: 0 to +70°C
      Extend: -20 to +85°C
      Industrial: -40 to +85°C

Product Applications
● Gigabit Ethernet
● Fiber Channel
● ATM/SONET/SDH/Switch/Router
● Other Optical Transmission Systems

Performance Specifications
Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Storage Temperature

Tst

-40

+85

°C

Operating Temperature

TO

BYCS-Bxx31-20D

0

+70

°C

BYCS-Bxx31-20DE

-20

+85

°C

BYCS-Bxx31-20DE

-40

+85

°C

Input Voltage

-

GND

VCC

V

Power Supply Voltage

VCC-VEE

0

+3.6

V

Note: Stress in excess of maximum absolute ratings can cause permanent damage to the module.

Recommended Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Storage Temperature

Tst

-40

-

+85

°C

Operating Case Temperature

TC

BYCS-Bxx31-20D

0

-

+70

°C

BYCS-Bxx31-20DE

-20

-

+85

°C

BYCS-Bxx31-20DI

-40

-

+85

°C

Power Supply Voltage

VCC

3.1

3.3

3.5

V

Power Supply Current

ICC

-

-

300

mA

Data Rate

DR

-

3.125

-

Gbps

Optical Specification

Transmitter

Paramet

Symbol

Min

Typ

Max

Unit

Note

Center Wavelength

1310 DFB

λC

1270

1310

1340

nm

1550 DFB

1500

1510

1580

Spectral Width

DFB

Δλ

-

-

1

nm

-

SMSR

30

dB

Average Optical Output Power

Po

-5

-

2

dBm

-

Extinction Ratio

ER

6

-

-

dB

-

Optical Rise/Fall Time(20%-80%)

Tr/Tf

-

-

0.28

ns

-

Receiver

Parameter

Symbol

Min

Typ

Max

Unit

Note

Operate Wavelength

λC

1261

-

1360

nm

-

1490

1510

1580

Receiver Sensitivity

RSENS

-

-

-18

dBm

1

Receiver Saturation

PRS

0

-

-

dBm

1

LOS Assert

-

-35

-

-

dBm

Alarm : High-level

LOS De-Assert

-

-

-

-20

dBm

LOS Hysteresis

-

0.5

-

5

dBm

-

 Note:1. MinimumSensitivityandsaturationlevelsfora27-1PRBStestpattern@3.125Gbps

Electrical Specification

Transmitter

Parameter

Symbol

Min

Typ

Max

Unit

Note

Power Supply Current

ICCT

-

80

160

mA

2

Input Differential Impedance

ZIN

90

100

110

Ω

-

Input Swing Differential Voltage

VIN

350

-

1600

mV

3

TX-Disable Voltage

Disable

-

2.0

-

VCC

V

-

Enable

-

0

-

0.8

V

-

TX-Fault Voltage

Fault

-

2.0

-

VCC

V

-

Normal

-

0

-

0.8

V

-

Receiver

Parameter

Symbol

Min

Typ

Max

Unit

Note

Power Supply Current

ICCR

-

70

150

mA

2

Output Swing Differential Voltage

VOUT

800

-

2000

mV

4

LOS Voltage

High

-

2.0

-

VCC

V

-

Low

-

0

-

0.8

V

-

Note:
2. The current excludes the output load current.
3. PECL/CML input, internally AC-coupled and terminated.
4. Internally AC-coupled.

Package Diagram
Board Layout Hole Pattern7

LC Side Interface8

Order Information

产品型号

封装

波长(-xx)

速率(xx)

传输距离  (-xx)

x

等级(x)

BYCS-B1331-20Dxx /
BYCS-B1531-20Dxx

SFP

B13=T1310/R1550 
B15=T1550/R1310

31=3.125G

20=20km

空 不带DDM 
D 带DDM

空 商业级 
E 扩展级 
I 工业级