LCP-1250 Delta Electronics, Inc., LCP-1250 Datasheet - Page 5

• Manufacturer Part Number: LCP-1250
• Description: Rohs Compliant Single Mode Sfp Transceiver For Gbe And Fiber Channel Electronics, .
• Manufacturer: Delta Electronics, Inc.

Pin Function Definitions
Plug Seq.: Pin engagement sequence during hot plugging.
Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10K resistor on
2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K –
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KŸ
5) VeeR and VeeT may be internally connected within the SFP module.
6) RD-/+: These are the differential receiver outputs. They are AC coupled 100Ÿ differential lines which
DELTA ELECTRONICS, INC.
Pin Num.
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser
fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
module with a 4.7 – 10 K Ÿ resistor. Its states are:
Low (0 – 0.8V):
(>0.8, < 2.0V):
High (2.0 – 3.465V):
Open:
10KŸresistor on the host board. The pull-up voltage shall be VccT or VccR (see Section IV for further
details). Mod-Def 0 is grounded by the module to indicate that the module is present Mod-Def 1 is the
clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface
for serial ID
resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the
received optical power is below the worst-case receiver sensitivity (as defined by the standard in use).
Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
should be terminated with 100Ÿ (differential) at the user SERDES. The AC coupling is done inside the
MOD-DEF2
MOD-DEF1
MOD-DEF0
Rate Select
TX Disable
TX Fault
Name
VeeT
VeeR
VeeR
VeeR
VeeR
VccR
VeeT
VeeT
VccT
LOS
RD+
TD+
RD-
TD-
Inv. Transmit Data In
Transmitter Ground
Transmitter Fault Indication
Transmitter Disable
Module Definition 2
Module Definition 1
Module Definition 0
Not Connect
Loss of Signal
Receiver Ground
Receiver Ground
Receiver Ground
Inv. Received Data Out
Received Data Out
Receiver Ground
Receiver Power
Transmitter Power
Transmitter Ground
Transmit Data In
Transmitter Ground
Transmitter on
Undefined
Transmitter Disabled
Transmitter Disabled
Function
5
Plug Seq.
1
3
3
3
3
3
3
3
1
1
1
3
3
1
2
2
1
3
3
1
Note 1
Note 2
Module disables on high or open
Note 3, 2 wire serial ID interface
Note 3, 2 wire serial ID interface
Note 3, Grounded in Module
Function not available
Note 4
Note 5
Note 5
Note 5
Note 6
Note 7
Note 5
3.3 ± 5%, Note 7
3.3 ± 5%, Note 7
Note 5
Note 8
Note 8
Note 5
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Notes
Aug., 2006
Rev. 6A