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GO2921B31CM Datasheet PDF - Gennum

Part Number GO2921B31CM
Description 1310nm Optical Transceiver
Manufacturers Gennum 
Logo Gennum Logo 

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GO2921B31CM 1310nm Optical Transceiver
Features
• Robust error free transmission of signals from 50Mbps
to 3Gbps with up to 30km single-mode fiber
• Maximum distance of 10km under worst-case
conditions and 3Gbps video pathological signals
• Supports video pathological patterns for SD-SDI,
HD-SDI and 3G-SDI
• Hot-pluggable
• Laser disable pin
• Diagnose and control via I2C interface including:
Š Monitoring of laser bias current, average output
power, receive optical power, supply voltage and
temperature
Š Alarm reporting
Š Module ID polling
• Single +3.3V power supply
• RoHS compliant
• Telcordia GR-468 compliant
• Operating temperature range: 0°C to 70°C (case)
• 56.5mm x 13.4mm x 8.6mm SFP Package
• SMPTE 297-2006 compatible
Applications
• SMPTE 297-2006 compatible optical-to-electrical
interfaces
• Broadcast cameras
Description
The GO2921B is an optical transceiver module designed to
transmit and receive electrical and optical serial digital
signals as defined in SMPTE 297-2006. The GO2921B is
specifically designed for robust performance in the
presence of SDI pathological patterns for SMPTE 259M,
SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates.
The GO2921B contains a PIN photodiode receiver and a
1310nm Fabry-Perot laser transmitter designed to provide
error-free transmission of signals from 50Mbps to 3Gbps
over single mode fiber (9/125). It is also hot-pluggable.
The GO2921B provides extensive operational status
monitoring through an I2C interface. Input optical power is
monitored in the receiver; output optical power and bias
current are monitored in the transmitter. Other operating
conditions, such as power supply and operating
temperature, are also monitored. If a monitored parameter
falls outside the pre-defined range, an alarm flag for the
parameter is raised.
Ordering Information
Part Number
GO2921B31CM
Package
SFP
Temperature Range
TCASE= 0°C to 70°C
GO2921B 3G-SDI 1310nm Video Optical Transceiver Module
GO2921B31CM 1310nm Optical Transceiver
Data Sheet
51976 - 0
October 2009
www.gennum.com
1 of 27

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GO2921B31CM equivalent
2.2 Pin Descriptions
Table 2-1: Pin Descriptions
Number
Name
Type
Description
1
VEE_TX
Ground
Transmitter Ground connection
2
TX_FAULT
Output
Transmitter fault indicator (Active high,
open-drain)
3 NC No Connect No Connection
4
VEE_TX
Ground
Transmitter Ground connection
5
I2C CLK
Digital (Input) I2C Clock
6
I2C DATA
Digital
I2C Data
(Bi-Directional)
7
VEE_RX
Ground
Receiver Ground connection
8
RX_LOS
Output
Receiver loss of signal indicator (Active
high, open-drain)
9 NC No Connect No Connection
10 NC No Connect No Connection
11
VEE_RX
Ground
Receiver Ground connection
12
RD-
Output
Negative differential output (AC-coupled
internally)
13
RD+
Output
Positive differential output (AC-coupled
internally)
14
VEE_RX
Ground
Receiver Ground connection
15
VCC_RX
Power
Receiver power supply
16
VCC_TX
Power
Transmitter power supply
17
VEE_TX
Ground
Transmitter Ground connection
18
TD+
Input
Positive differential input (AC-coupled
internally)
19
TD-
Input
Negative differential input (AC-coupled
internally)
20
TX_DIS
Digital (Input) Transmitter Disable. Laser is disabled when
high. Internal 6kΩ pull-up.
NOTES:
1. All VEE_TX are connected together inside the module
2. All VEE_RX are connected together inside the module
GO2921B31CM 1310nm Optical Transceiver
Data Sheet
51976 - 0
October 2009
5 of 27


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