GO2927
DUAL CHANNEL VIDEO OPTICAL RECEIVER MODULE
Datasheet name: GO2927_55588_doc2.pdf
Contact information: info@embrionix.com
www.embrionix.com
1 of 23GO2927 Dual Channel Video Optical Receiver Module
Data Sheet
55588 - 2 April 2011
GO2927 Dual Channel Video Optical Receiver Module
www.gennum.com
Features
• Best-in-class optical receiver sensitivity: -23dBm
(over all supported video rates with pathological data)
• Exceeds SMPTE 297-2006 specifications
• Robust error free reception of signals from 50Mbps to
3Gbps
• Supports SD-SDI, HD-SDI and 3G-SDI
• Hot-pluggable
• User writeable EEPROM
• Digital diagnostics and control via the I2C interface
including:
Monitoring of receive optical power, supply voltage
and module temperature
Alarm reporting
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
Applications
• SMPTE 297-2006 compatible optical-to-electrical
interfaces
• High-density video routers
Description
The GO2927 is a dual channel optical receiver module
engineered for exceptional performance with SDI
pathological patterns. The receivers feature best-in-class
optical receive sensitivity for SMPTE 259M, SMPTE 344M,
SMPTE 292M and SMPTE 424M serial rates, thus providing
superior optical link budget and robustness.
Each receiver exceeds the SMPTE 297-2006 specifications
and is designed to provide error-free reception of signals
from 50Mbps to 3Gbps. The GO2927 is hot-pluggable.
The GO2927 provides extensive operational status
monitoring through an I2C interface. For each receiver
channel, input optical power is monitored. Other operating
conditions such as supply voltage and operating
temperature are also monitored. If a parameter monitored
is outside the pre-defined range, the alarm flag associated
with the parameter will be raised.
Ordering Information
Figure A: GO2927 3G-SDI Dual Channel Video Optical Receiver Module
Part Number Package Temperature Range
GO2927-CM SFP TCASE = 0°C to 70°C
GO2927 Dual Channel Video Optical Receiver Module
Data Sheet
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Revision History
Contents
Features.................................................................................................................................................................1
Description...........................................................................................................................................................1
Ordering Information .......................................................................................................................................1
Revision History .................................................................................................................................................2
1. Functional Block Diagram..........................................................................................................................3
2. Pin Specifications ..........................................................................................................................................4
2.1 Pin Configuration .............................................................................................................................4
2.2 Pin Descriptions ................................................................................................................................ 5
2.3 Host Board Power Supply Requirements .................................................................................6
2.4 Optical Connector Requirements ................................................................................................6
3. Product Specifications .................................................................................................................................7
3.1 Absolute Maximum Ratings ..........................................................................................................7
3.2 Optical Performance Specifications ...........................................................................................7
3.3 DC Electrical Specifications ..........................................................................................................8
3.4 AC Electrical Specifications ..........................................................................................................9
3.5 Supporting Circuit Specifications ...............................................................................................9
3.5.1 In-Rush Current Control Circuit ......................................................................................9
4. Digital Diagnosis......................................................................................................................................... 10
4.1 I2C Bus Interface ............................................................................................................................ 10
4.2 Serial Interface Memory Map .................................................................................................... 12
5. Application Reference Design ............................................................................................................... 18
5.1 Typical Application Circuit ........................................................................................................ 18
6. References and Relevant Standards .................................................................................................... 19
7. Package Information ................................................................................................................................. 20
7.1 Package Dimensions ..................................................................................................................... 20
7.2 PCB Layout Recommendations .................................................................................................21
Version ECR Date Changes and/or Modifications
0 154502 July 2010 New document.
1 155910 March 2011 Added EEPROM tables.
2 156192 April 2011 Updated EEPROM Table 4-4 and Table 4-5.
GO2927 Dual Channel Video Optical Receiver Module
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1. Functional Block Diagram
Figure 1-1: GO2927 Functional Block Diagram
I
2
C Bus Digital
Diagnostics
Limiting
AMP 1
Differential
Electrical Output
Receiver Input
Power Monitoring
ROSA_1
TIA + PIN 1260 - 1620nm
Differential
Electrical Output
Limiting
AMP 2 1260 - 1620nm
ROSA_2
TIA + PIN
GO2927 Dual Channel Video Optical Receiver Module
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2. Pin Specifications
2.1 Pin Configuration
Figure 2-1 shows the host board pad configuration for the GO2927. Figure 2-2 shows the
edge connector pad configuration for the GO2927.
Figure 2-1: GO2927 Host Board Pad Configuration
Figure 2-2: GO2927 Edge Connector Pad Configuration
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Towards
Bezel
Towards
ASIC
VEE_RX2
RD2-
RD2+
I
2
C CLK
VEE_RX2
I
2
C DATA
VEE_RX1
NC
NC
NC
NC
NC
NC
VEE_RX2
VEE_RX1
VEE_RX1
RD1-
RD1+
VCC_RX1
VCC_RX2
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
VEE_RX2
VEE_RX1
VEE_RX1
RD-
RD+
VCC_RX1
VCC_RX2
NC
NC
NC
VEE_RX2
NC
VEE_RX1
NC
NC
I2C DATA
I2C CLK
RD2+
RD2-
VEE_RX2
Top of Board Bottom of Board
(as viewed through top of board)
GO2927 Dual Channel Video Optical Receiver Module
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2.2 Pin Descriptions
Table 2-1 lists the pin descriptions for the GO2927.
Table 2-1: Pin Descriptions
Number Name Type Description
1 VEE_RX2 Ground Receiver Channel 2 Ground Connection
2 RD2- Output Negative Differential Output (AC-coupled
internally)
3 RD2+ Output Positive Differential Output (AC-coupled
internally)
4 VEE_RX2 Ground Receiver Channel 2 Ground Connection
5I2C CLK Digital (Input) I2C Clock
6I2C DATA Digital
(Bi-Directional)
I2C Data
7 VEE_RX1 Ground Receiver Channel 1 Ground Connection
8 NC No Connect No Connection
9 NC No Connect No Connection
10 NC No Connect No Connection
11 VEE_RX1 Ground Receiver Channel 1 Ground Connection
12 RD1- Output Negative Differential Output (AC-coupled
internally)
13 RD1+ Output Positive Differential Output (AC-coupled
internally)
14 VEE_RX1 Ground Receiver Channel 1 Ground Connection
15 VCC_RX1 Power Receiver Channel 1 Power Supply
16 VCC_RX2 Power Receiver Channel 2 Power Supply
17 VEE_RX2 Ground Receiver Channel 2 Ground Connection
18 NC No Connect No Connection
19 NC No Connect No Connection
20 NC No Connect No Connection
NOTES:
1. All VEE signals are connected together inside the module.
2. VCC_RX1 and VCC_RX2 are independent supplies.
GO2927 Dual Channel Video Optical Receiver Module
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2.3 Host Board Power Supply Requirements
The host board is required to provide a regulated and filtered power supply of 3.3V +/-
5% for the GO2927 via the on board SFP connector. Figure 2-3 shows the recommended
board supply filtering. When the host board is loaded with a resistive load in place of the
SFP module and sourcing the maximum rated current, the peak-to-peak power supply
noise measured on the SFP connector should comply to Table 2-2.
Figure 2-3: Recommended Host Board Supply Filtering
2.4 Optical Connector Requirements
An LC connector with PC/UPC polish is required for each port.
Table 2-2: Host Board Power Supply Noise Requirement at VCC_Rx
Frequency (MHz) Peak-to-Peak Noise Amplitude (%)
0.02-1 2
1-10 3
VCC_RX1
VCC_RX2
GO2927 Host Board
3.3V
GO2927 Dual Channel Video Optical Receiver Module
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3. Product Specifications
3.1 Absolute Maximum Ratings
Table 3-1 lists the absolute maximum ratings for the GO2927. Conditions exceeding the
limits listed may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other conditions outside those listed
in the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
3.2 Optical Performance Specifications
Table 3-2 lists the optical performance specifications for the GO2927.
Table 3-1: Absolute Maximum Ratings
Parameter Conditions Value/Units
Supply Voltage – 4.0V
Operating Case Temperature – -20°C < TCASE < 80°C
Storage Temperature – -40°C < TSTG < 85°C
Receiver Optical Input Power – 5dBm
ESD tolerance on all pins – ±1kV HBM
Relative Humidity
(non-condensing)
– 5% - 95% RH
Table 3-2: Optical Performance Specifications
VCC = 3.3V ±5%, TC = 0oC to 70oC. Typical values are at VCC = 3.3V, TA = 25oC unless otherwise specified.
Parameter Symbol Condition Min Ty p Max Unit Notes
Wavelength λ– 1260 – 1620 nm –
Sensitivity – ER=7dB – -25 -23 dBm 1
Overload – – 0 – – dBm 1
Loss of Signal Asserted – 2.97Gbps PRBS
ER=7dB
-31 – – dBm –
Loss of Signal De-asserted – 2.97Gbps PRBS
ER=7dB
––-23dBm–
Loss of Signal Optical
Hysteresis
– 2.97Gbps PRBS
ER=7dB
0.5 – – dB –
Maximum Back Reflection – – – – -27 dB –
GO2927 Dual Channel Video Optical Receiver Module
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3.3 DC Electrical Specifications
Table 3-3 lists the DC electrical specifications for the GO2927. Figure 3-1 shows the
definition of the differential signal level.
Figure 3-1: Definition of Differential Signal Level
Input Power Monitoring
Accuracy
––-2–2dB–
NOTES
1. The sensitivity and overload specification refers to the input power levels for BER = 1E-12 against both PRBS and pathological patterns at
SMPTE 259M, SMPTE 292M and SMPTE 424M rates.
Table 3-2: Optical Performance Specifications (Continued)
VCC = 3.3V ±5%, TC = 0oC to 70oC. Typical values are at VCC = 3.3V, TA = 25oC unless otherwise specified.
Parameter Symbol Condition Min Ty p Max Unit Notes
Table 3-3: DC Electrical Specifications
VCC = 3.3V ±5%, TC = 0oC to 70oC. Typical values are at VCC = 3.3V, TA = 25oC unless otherwise specified.
Parameter Symbol Condition Min Typ Max Unit Notes
Operating Temperature Range TCASE –0–70°C1
Power Supply Voltage VCC – 3.13 3.3 3.47 V 1
Total Power Consumption – – – 600 700 mW –
Differential Output Data Amplitude Vp-pDiff – 0.550 0.660 0.850 V 2
Digital Input Low VIL 0–0.8V–
Digital Input High VIH 2–V
CC V–
NOTES
1. Outside the specified range, performance is not guaranteed.
2. Each leg must be terminated to a 50Ω (single-ended) termination. Signals are AC coupled internally within the module.
DATAP
DATAN
DATAP - DATAN
0V
V
SE
V p-p
DIFF
= 2 x V
SE
GO2927 Dual Channel Video Optical Receiver Module
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3.4 AC Electrical Specifications
Table 3-4 lists the AC electrical specifications for the GO2927.
3.5 Supporting Circuit Specifications
3.5.1 In-Rush Current Control Circuit
Due to the hot-pluggable requirement, the GO2927 has built-in circuits to limit the
in-rush current upon hot insertion. The specifications of the in-rush limiting circuits are
summarized in Table 3-5.
Table 3-4: AC Electrical Specifications
VCC = 3.3V ±5%, TC = 0oC to 70oC. Typical values are at VCC = 3.3V, TA = 25oC unless otherwise specified.
Parameter Symbol Condition Min Max Units
Bit Rate BR – 50 3000 Mbps
Rise/Fall Time tr / tf20% to 80% – 135 ps
Time to Initialize t_init From power on – 300 ms
Rx_LOS Assert Time t_loss_on Time from Rx_LOS state to Rx_LOS assert – 10 ms
Rx_LOS Deassert Time t_loss_off Time from non-Rx_LOS state to Rx_LOS
deassert
–10ms
Serial ID Clock Rate f_serial_clock – – 400 kHz
Table 3-5: In-rush Current Limiting Circuits Specifications
Parameter Value
Maximum in-rush current ramp rate 50mA/ms
Maximum in-rush current 30mA over steady state
GO2927 Dual Channel Video Optical Receiver Module
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4. Digital Diagnosis
4.1 I2C Bus Interface
The I2C interface allows reading of diagnostic information from the module. It is
comprised of I2C DATA and I2C CLK pins. All address and data bytes are transmitted
through the I2C DATA pin. The I2C DATA and I2C CLK pins are open-collector and they
must be pulled high (4.75kΩ recommended) externally to the module. Data on the I2C
DATA pin may only change during I2C CLK 'low' time periods. Data changes during I2C
CLK 'high' periods will indicate either a START or STOP condition. Operations and
conditions are described as follows:
START Condition
The START condition is originated by the host. A high-to-low transition of I2C DATA
while I2C CLK 'high' defines a START condition that must precede any other command,
see Figure 4-1.
STOP Condition
The STOP condition is originated by the host. A low-to-high transition of I2C DATA while
I2C CLK 'high' defines a STOP condition, see Figure 4-1.
Figure 4-1: I2C START and STOP Condition
Acknowledge or ACK Condition
The acknowledge condition occurs when the I2C DATA pin is pulled 'low' during the
ninth clock pulse following an address or data byte. The module originates this
condition after it has received a block or data address. The host originates this condition
during a sequential address read operation.
Addressing Operation
The module must receive a block address following a START condition to enable a read
operation. The block address is clocked into the module MSB to LSB. There are three read
operations: current address read, random read, and sequential address read.
Note that by the convention specified in the SFP MSA, 7-bit block addresses are left
shifted by one bit when expressing them in hex. Block addresses for the different
I2C DATA
I2C CLK
STOPSTART
GO2927 Dual Channel Video Optical Receiver Module
Data Sheet
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memory regions are specified in Section 4.2. Block addresses A0h, A2h and B2h would
therefore be transmitted defined as binary 1010000, 1010001 and 1011001 respectively.
Current Address Read Operation
The module has an internal register that maintains the data address used during the last
read operation, incremented by one. If the most recent data address was FFh, then the
register resets to 00h. Once the block address is clocked in by the host with the R/W bit
set 'high', the module follows with an ACK condition, and the data byte located at the
current data address is serially clocked out of the module MSB to LSB. The operation is
terminated when the host does not provide an ACK condition and initiates a STOP
condition. See Figure 4-2.
Figure 4-2: I2C Current Address Read Operation
Random Address Read Operation
A random read operation requires a dummy write sequence to load in the data address.
Once the block and data addresses are clocked in by the host followed by an ACK
condition provided by the module, the host must generate another START condition. The
host now initiates a current address read operation by sending the block address with
the R/W bit set 'high'. The module provides an ACK condition and serially clocks out the
data byte. The operation is terminated when the host does not provide an ACK condition
and initiates a STOP condition. See Figure 4-3.
Figure 4-3: I2C Random Access Read Operation
Sequential Address Read Operation
The sequential address read operation is initiated by either a current address read or
random address read operation. After the host receives the first data byte, it responds
with an ACK condition. As long as the module receives the ACK condition after a data
byte is read, the host can clock out additional data bytes from the module. After the data
address reaches FFh, it resets to 00h. The operation is terminated when the host does not
provide an ACK condition and initiates a STOP condition. See Figure 4-4.
I
2
C DATA 7 6 5 432176543210R A
Host driving data line Module driving data line
Block AddressSTART STOPRead
ACK NO ACK
Data Byte
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Figure 4-4: I2C Sequential Read Access Operation
4.2 Serial Interface Memory Map
Module identification and digital diagnostic monitoring information is accessible
through the memory map addresses shown in this section. The items below outline the
different block addresses of the module:
• Block address A0h contains serial ID information of the module.
• Block address A2h contains alarm flags, warning flags, thresholds and real-time
digital diagnostic features set for channel 1.
• Block address B2h contains alarm flags, warning flags, thresholds and real-time
digital diagnostic features set for channel 2.
The 16-bit digital diagnostic monitoring information is internally calibrated over
Gennum’s specified operating temperature and voltage. Alarm and warning threshold
values are calibrated in the same manner and can be interpreted as defined below.
Internally measured module temperature is represented as a 16-bit signed two’s
complement value in increments of 1/256°C, yielding a total range of -128°C to +128°C.
To calculate the temperature, treat the two’s complement value as a 16-bit unsigned
integer and divide it by 256. If the result is greater or equal to 128, subtract 256 from the
result. See Table 4-1 for temperature conversion examples.
Internally measured module supply voltage is represented as a 16-bit unsigned integer
with the voltage defined as the full 16-bit value with the LSB equal to 100μV, yielding a
total range of 0 to +6.55V. To calculate the supply voltage, multiply the 16-bit unsigned
integer by 100μV.
Internally measured Rx optical power is represented as a 16-bit unsigned integer with
the power defined as the full 16-bit value with the LSB equal to 0.1μW, yielding a total
I
2
C DATA 7 65432176543210R A
Host driving data line Module driving data line
Block AddressSTART STOPRead
ACK NO ACK
Data Byte (N)
76 5 43210A
ACK
Data Byte (N+1)
76543210A
ACK
Data Byte (N+M)
Table 4-1: Temperature Conversion Examples
MSB (BIN) LSB (BIN) Temperature (°C)
01000000 00000000 64°C
01000000 00001111 64.059°C
01011111 00000000 95°C
11110110 00000000 -10°C
11011000 00000000 -40°C
GO2927 Dual Channel Video Optical Receiver Module
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range of 0 to 6.5535mW (~ -40 to +8.2dBm). To calculate the Rx optical power, multiply
the 16-bit unsigned integer by 0.1μW.
Table 4-2: Module Identification Fields
Block Address: A0h
Address Size Name Description and Value
0 1 Identifier Type of serial transceiver. 82h
1 1 Ext. Identifier Extended identifier of type of serial
transceiver. 04h
2 1 Connector Code for connector type. 07h for LC
connectors.
3 1 Standards
Compliance
41h, for SMPTE259M/344M/292M/424M and
SMPTE 297M.
4-10 8 Transceiver Code Code for electronic compatibility or optical
compatibility. Not applicable for GO2927.
11 1 Encoding Code for serial encoding algorithm. Value:
03H for NRZ.
12 1 BR, Nominal Nominal bit rate, units of 100 Mbps, 1Eh for
3Gbps.
13 1 Reserved Xxh
14 1 Length (9mm) -
km
Link length supported for standard SFM,
units of km, 1Eh (at HD-SDI with GO2928).
15 1 Length (9mm) Link length supported for standard SFM,
units of 100 m, 00h
16 1 Length (50mm) Link length supported for 50/125 mm fiber,
units of 10 m. 00h
17 1 Length (62.5mm) Link length supported for 62.5/125 mm
fiber, units of 10 m. 00h
18 1 Length (Copper) Link length supported for copper, units of
meters. 00h
19 1 Reserved Xxh
20-35 16 Vendor name SFP with OM transceiver vendor name
(ASCII). G E N N U M
20 1 G 47h
21 1 E 45h
22 1 N 4Eh
23 1 N 4Eh
24 1 U 55h
25 1 M 4Dh
26-35 10 – 20h for each byte
GO2927 Dual Channel Video Optical Receiver Module
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36 1 Reserved –
37-39 3 Vendor OUI SFP with OM transceiver vendor IEEE
company ID. 00 0A DF
40-55 16 Vendor PN Part number provided by SFP with OM
transceiver vendor. G O 2 9 2 7–C M
40 1 G 47h
41 1 O 4Fh
42 1 2 32h
43 1 9 39h
44 1 2 32h
45 1 7 37h
46 1 – 2Dh
47 1 C 43h
48 1 M 4Dh
49-55 8 – 20h
56-58 3 Reserved −
59 1 Vendor Rev Revision level for part number provided by
vendor.
60-61 2 NA −
62 1 Reserved Xxh
63 1 CC_BASE Check code for Base ID fields. (The value of
the lower 8 bits of the sum of the contents
from address 0 to 62.)
64-65 2 Options Indicates which optional SFP with OM
signals are implemented.
64 1 Reserved 00h
65 1 – 02h
66 1 BR, max Upper bit rate margin, units of %, 5h.
67 1 BR, min Lower bit rate margin, units of %, 5Fh.
68-83 16 Vendor SN Serial number provided by vendor (ASCII)
84-85 2 Year Manufacturing date code (ASCII).
86-87 2 Month Manufacturing date code (ASCII).
88-89 2 Day Manufacturing date code (ASCII).
90-91 2 Blank –
Table 4-2: Module Identification Fields (Continued)
Block Address: A0h
Address Size Name Description and Value
GO2927 Dual Channel Video Optical Receiver Module
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92 1 Calibration flag 28h for calibrated average input power
93 1 – 90h, Enhanced alarm/warning flags
94 1 Reserved Xxh
95 1 CC_EXT Check code for the Extended ID fields. (The
value of the lower 8 bits of the sum of the
contents from address 64 to 94.)
96-255 160 Reserved Vendor specific
Table 4-3: Alarms and Warning Thresholds
Block Address: A2h for Receive Channel 1, B2h for Receive Channel 2
Address Size Name Description and Value
0-1 2 Temp High Alarm MSB at lower address. 78°C case temp
2-3 2 Temp Low Alarm MSB at lower address. -8°C case temp
4-5 2 Temp High
Warning
MSB at lower address. 73°C case temp
6-7 2 Temp Low
Warning
MSB at lower address. -3°C case temp
8-9 2 Supply Voltage
High Alarm
MSB at lower address. 3.6V
10-11 2 Supply Voltage
Low Alarm
MSB at lower address. 3.0V
12-13 2 Supply Voltage
High Warning
MSB at lower address. 3.47V
14-15 2 Supply Voltage
Low Warning
MSB at lower address. 3.14V
16-31 16 N/A –
32-33 2 Rx Power High
Alarm
MSB at lower address. 0dBm.
34-35 2 Rx Power Low
Alarm
MSB at lower address. -25dBm.
36-37 2 Rx Power High
Warning
MSB at lower address. -1dBm.
38-39 2 Rx Power Low
Warning
MSB at lower address. -24dBm.
40-95 56 Reserved. –
Table 4-2: Module Identification Fields (Continued)
Block Address: A0h
Address Size Name Description and Value
GO2927 Dual Channel Video Optical Receiver Module
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Table 4-4: Alarms and Real Time Diagnostic information
Block Address: A2h for Receive Channel 1, B2h for Receive Channel 2
Adress Size Name Description and Value
96 1 Temperature
MSB
Internally measured module temperature
(approximately equal to case temperature)
97 1 Temperature LSB Internally measured module temperature
(approximately equal to case temperature)
98 1 VCC MSB Internally measured module supply voltage
99 1 VCC LSB Internally measured module supply voltage
100-103 4 N/A –
104 1 Rx Power MSB Internally measured Rx power
105 1 Rx Power LSB Internally measured Rx power
106-109 9 Reserved –
110 1 Reserved Bit 7-2
LOS Bit 1: Indicates Rx_LOS state
Data_Ready Bit 0
111 1 Temp Update Bit 7 goes to high after a temperature
update
VCC Update Bit 6 goes to high after a VCC update
Reserved Bit 5-4
Rx Power Update Bit 3 goes to high after a Rx input power
update
Reserved Bit 0-2
112 1 Temp High Alarm
Flag
Bit 7, set when the internal temperature
exceeds the high temp alarm threshold
Temp Low Alarm
Flag
Bit 6, set when the internal temperature
goes below the low temp alarm threshold
Supply Voltage
High Alarm Flag
Bit 5, set when the internal VCC exceeds the
supply voltage high alarm threshold
Supply Voltage
Low Alarm Flag
Bit 4, set when the internal VCC goes below
the supply voltage low alarm threshold
N/A Bit 0-3
113 1 Rx Power High
Alarm Flag
Bit 7, set when the monitored Rx power
exceeds the Rx power high alarm threshold
Rx Power Low
Alarm Flag
Bit 6, set when monitored Rx power current
goes below the Rx power low alarm
threshold
Reserved Bit 0-5
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114-115 2 Reserved –
116 1 Temp High
Warning Flag
Bit 7, set when the internal temperature
exceeds the high temp warning threshold
Temp Low
Warning Flag
Bit 6, set when the internal temperature
goes below the low temp warning threshold
Supply Voltage
High Warning
Flag
Bit 5, set when the internal VCC exceeds the
supply voltage high warning threshold
Supply Voltage
Low Warning
Flag
Bit 4, set when the internal VCC goes below
the supply voltage low warning threshold
N/A Bit 0-3
117 1 Rx Power High
Warning Flag
Bit 7, set when the monitored Rx power
exceeds the Rx power high warning
threshold
Rx Power Low
Warning Flag
Bit 6, set when the monitored Rx power
goes below the Rx power low warning
threshold
Reserved Bit 0-5
118-127 10 Reserved –
Table 4-5: Writeable Area
Block Address: A2h
Address Size Name Description and Value of the Field
128-247 120 User Writeable
Area
–
248-255 8 Reserved –
Table 4-4: Alarms and Real Time Diagnostic information (Continued)
Block Address: A2h for Receive Channel 1, B2h for Receive Channel 2
Adress Size Name Description and Value
GO2927 Dual Channel Video Optical Receiver Module
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5. Application Reference Design
5.1 Typical Application Circuit
Figure 5-1 shows a typical application circuit for the GO2927.
Figure 5-1: Typical Application Circuit
Differential
4.7k
VCC_3V3
Differential
VCC_3V3
RD1-
RD1+
VCC_3V3
100nF
100nF
1
2
3
4
5
6
7
8
9
VEE
RD2-
RD2+
VEE
I
2
C CLK
I
2
C DATA
VEE
NC
NC
NC
10 11
12
13
14
15
16
17
18
19
VEE
RD1-
RD1+
VEE
VCC_RX1
VCC_RX2
VEE
NC
NC
NC 20
GO2927
I
2
C CLK
I
2
C DATA
RD2-
RD2+
4.7k
To GS2965 Reclocker
To GS2965 Reclocker
100nF
GO2927 Dual Channel Video Optical Receiver Module
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6. References and Relevant Standards
Table 6-1: References and Relevant Standards
INF-8074i Rev 1.0 SFP (Small Formfactor Pluggable) Transceiver
SMPTE 259M-2008 SDTV Digital Signal/Data – Serial Digital Interface
SMPTE 292M-2008 1.5 Gbps Signal / Data Serial Interface
SMPTE 297-2006 Serial Digital Fiber Transmission System for SMPTE 259M, SMPTE 344M, SMPTE 292 and SMPTE
424M Signals
SMPTE 344M-2000 540 Mbps Serial Digital Interface
SMPTE 424M-2006 3 Gbps Signal/Data Serial Interface
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7. Package Information
7.1 Package Dimensions
A common mechanical outline, as shown in Figure 7-1, is used for all SFP modules.
Figure 7-1: Common SFP Package Outline
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7.2 PCB Layout Recommendations
Figure 7-2: Host PCB Layout
Notes:
1. Datum and basic dimensions
established by customer
2. Pads and vias are chassis-ground
in 11 places
3. Through-holes and plating are optional
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Figure 7-3: Detailed Host PCB Layout
OTTAWA
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DOCUMENT IDENTIFICATION
DATA SHEET
The product is in production. Gennum reserves the right to make changes to
the product at any time without notice to improve reliability, function or
design, in order to provide the best product possible.
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23
Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. The sale of
the circuit or device described herein does not imply any patent license, and Gennum makes no representation that the circuit or device is free from patent
infringement.
All other trademarks mentioned are the properties of their respective owners.
GENNUM and the Gennum logo are registered trademarks of Gennum Corporation.
© Copyright 2010 Gennum Corporation. All rights reserved.
www.gennum.com
GENNUM CORPORATE HEADQUARTERS
4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada
Phone: +1 (905) 632-2996 Fax: +1 (905) 632-2055
E-mail: corporate@gennum.com www.gennum.com
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ELECTROSTATIC SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A
STATIC-FREE WORKSTATION
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