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TRPEG1KVXE000E1 Datasheet(PDF) 4 Page - OPLINK Communications Inc.

Part # TRPEG1KVXE000E1
Description  Very Long Haul Gigabit Ethernet SFP Transceivers
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Manufacturer  OPLINK [OPLINK Communications Inc.]
Direct Link  http://www.oplink.com
Logo OPLINK - OPLINK Communications Inc.

TRPEG1KVXE000E1 Datasheet(HTML) 4 Page - OPLINK Communications Inc.

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Oplink Communications, Inc.
21737-0974, Rev.A
2009-01-30
Example of SFP host board schematic
TRPEG1KVX-E1
Application Notes
Electrical Interface: All signal interfaces are compliant with
the SFP MSA specification. The high speed DATA interface is
differential AC-coupled internally with 1μF and can be directly
connected to a 3.3V SERDES IC. All low speed control and sense
output signals are open collector TTL compatible and should
be pulled up with a 4.7 - 10kΩ resistor on the host board.
Loss of Signal (LOS): The Loss of Signal circuit monitors the
level of the incoming optical signal and generates a logic HIGH
when an insufficient photocurrent is produced.
TX Fault: The output indicates LOW when the transmitter
is operating normally, and HIGH with a laser fault including
laser end-of-life. TX Fault is an open collector/drain output
and should be pulled up with a 4.7 - 10kΩ resistor on the host
board. TX Fault is non-latching (automatically deasserts when
fault goes away).
TX Disable: When the TX Disable pin is at logic HIGH, the
transmitter optical output is disabled (less than -45dBm).
Serial Identification and Monitoring: The module definition
of SFP is indicated by the three module definition pins,
MOD_DEF(0), MOD_DEF(1) and MOD_DEF(2). Upon power up,
MOD_DEF(1:2) appear as NC (no connection), and MOD_DEF(0)
is TTL LOW. When the host system detects this condition,
it activates the serial protocol (standard two-wire I2C serial
interface) and generates the serial clock signal (SCL). The
positive edge clocks data into the EEPROM segments of the
SFP that are not write protected, and the negative edge clocks
data from the SFP.
The serial data signal (SDA) is for serial data transfer. The
host uses SDA in conjunction with SCL to mark the start and
end of serial protocol activation. The supported monitoring
functions are temperature, voltage, bias current, transmitter
power, average receiver signal, all alarms and warnings, and
software monitoring of TX Fault/LOS. The device is internally
calibrated.
The data transfer protocol and the details of the mandatory
and vendor specific data structures are defined in the SFP MSA,
and SFF-8472, Rev. 9.4.
Power Supply and Grounding:The power supply line should
be well-filtered. All 0.1μF power supply bypass capacitors
should be as close to the transceiver module as possible.
4
TRPEG1KVX
18
19
3
TX DATA IN+
15
1 H coil or ferrite bead
(<0.2 series resistance)
0.1
TX DATA IN-
TX Disable
16
0.1
+10
50 line
1, 9,10,11,14,17,20
0.1
+10
to 50 load
Vcc
3.3V
RX DATA OUT+
13
12
RX DATA OUT-
5
4
6
MOD_DEF(0)
MOD_DEF(1)
MOD_DEF(2)
LOS
to 50 load
8
R
2
TX Fault
R R
R
Vcc
3.3V
50 line
50 line
50 line
R
R: 4.7 to 10kΩ
CAP Values in μF


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