Specification Sheet

3
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18
CML-I
TD+
Transmitter Data Non-Inverted
19
CML_I
TD-
Transmitter Data Inverted
20
VeeT
Transmitter Ground
1. Signals not supported in SFP+ Copper pulled-down to VeeT with 30K ohms resistor
2. Passive cable assemblies do not support LOS and TX_DIS
Pin Description
Tx_Fault: Tx_Fault is an output pin to indicate a fault condition of a laser.This pin is connected
to ground in the module.
Tx_Disable: x_Disable is an input pin to disable the transmitter output. This pin is pulled high in
the module with a 5.11kOhm resistor.
SDA/SCL: SDA and SCL are the data and clock pins for the I2C interaction with the EEPROM. These pins are connected to the
SDA and SCL pins of the EEPROM in the module.
MOD_ABS: Mod_Abs is an output pin to indicate that a module is present in the port. This pin is connected to ground in the
module.
RS0/RS1: RS0 and RS1 are module rate select pins to determine the transmit data rate for lasers. Rx_LOS: Rx_LOS is an output
pin to indicate if the signal amplitude is below the receiver
threshold. This pin is connected to ground in the module.
Ground: VeeT and VeeR are connected within the module and are used as a digital ground for signal integrity. This digital ground
does not connect to the module case or the copper cable braid.
Power: VccT and VccR are connected within the module and are used to power the EEPROM. Typical voltage is 3.3 Volts and
each pin has a maximum current capacity of 500 mA.
Signal: The two high speed signal pairs, TD+/TD- and RD+/RD-, are 100 Ohm differential
impedance transmission lines with AC coupling on each RD trace.
Mechanical Specifications