sfp-gd-lx MRV Communications, Inc., sfp-gd-lx Datasheet - Page 4

• Manufacturer Part Number: sfp-gd-lx
• Description: 1.0625/1.25 Gbps Single-mode 20 Km Sfp Transceiver
• Manufacturer: MRV Communications, Inc.

Datasheet
Notes:
Pin Descriptions
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
1.
2.
3.
4.
5.
6.
TX Fault is an open collector output, which should be pulled up with a 4.7 k ~10 kΩ resistor on the host board to a voltage
between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates a laser fault of some kind. In the low state,
the output will be pulled to less than 0.8 V.
TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a
4.7 k ~10 kΩ resistor. Its states are:
Low (0~0.8V):
(>0.8V, <2.0V):
High (2.0~3.465V):
Open:
MOD-DEF 0,1,2 are the module defi nition pins. They should be pulled up with a 4.7 k ~ 10 kΩ resistor on the host board. The
pull-up voltage shall be VccT or VccR.
MOD-DEF 0 is grounded by the module to indicate that the module is present
MOD-DEF 1 is the clock line of two wires serial interface for serial ID
MOD-DEF 2 is the data line of two wires serial interface for serial ID
LOS is an open collector output, which should be pulled up with a 4.7 k ~ 10 kΩ resistor on the host board to a voltage
between 2.0 V and Vcc+0.3 V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the low state, the output
will be pulled to less than 0.8 V.
These are the diff erential receiver output. They are internally AC-coupled 100Ω diff erential lines which should be terminated
with 100Ω (diff erential) at the user SERDES.
These are the diff erential transmitter inputs. They are AC-coupled, diff erential lines with 100Ω diff erential termination inside
the module.
MOD-DEF2
MOD-DEF1
MOD-DEF0
Rate Select
Tx Disable
Tx Fault
Name
VeeR
VeeR
VeeR
VeeR
Optical Communications Systems™
VeeT
VccR
VccT
VeeT
VeeT
RD+
TD+
LOS
RD-
TD-
Transmitter on
Undefi ned
Transmitter Disabled
Transmitter Disabled
Inverted Transmitter Data In
Transmitter Fault Indication
Inverted Received Data Out
Module Defi nition 2
Module Defi nition 1
Module Defi nition 0
Transmitter Ground
Transmitter Ground
Transmitter Ground
Name/Description
Transmitter Disable
Transmitter Data In
Received Data Out
4
Transmitter Power
Receiver Ground
Receiver Ground
Receiver Ground
Receiver Ground
Not Connected
Receiver Power
Loss of Signal
Plug Seq.
1
3
3
3
3
3
3
3
1
1
1
3
3
1
2
2
1
3
3
1
Note
1
2
3
3
3
4
5
5
6
6
-
-
-
-
-
-
-
-
-
-