Mellanox Technologies SwitchX-2 User Manual page 62

Rev 1.1
Pin
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
a. Circuit ground is internally isolated from chassis ground.
b. T
FAULT
Ohms resistor on the host board if intended for use. Pull up voltage should be between 2.0V
to Vcc + 0.3V. A high output indicates a transmitter fault caused by either the TX bias cur-
rent or the TX output power exceeding the preset alarm thresholds. A low output indicates
normal operation. In the low state, the output is pulled to <0.8V.
c. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V
d. Should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage between 2.0V and 3.6V.
MOD_ABS pulls line low to indicate module is plugged in.
e. LOS is open collector output. Should be pulled up with 4.7kΩ – 10kΩ on host board to a
voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of
signal.
62 Mellanox Technologies
Symbol Name
SDA
2-wire Serial Interface Data Line
SCL
2-wire Serial Interface Clock Line
MOD_ABS
Module Absent. Grounded within the module
RS0 No connection required
RX_LOS
Loss of Signal indication. Logic 0 indicates normal operation.
RS1 No connection required
VeeR
Receiver Ground (Common with Transmitter Ground)
VeeR
Receiver Ground (Common with Transmitter Ground)
RD- Receiver Inverted DATA out. AC Coupled
RD+ Receiver Non-inverted DATA out. AC Coupled
VeeR
Receiver Ground (Common with Transmitter Ground)
VccR Receiver Power Supply
VccT Transmitter Power Supply
VeeT
Transmitter Ground (Common with Receiver Ground)
TD+ Transmitter Non-Inverted DATA in. AC Coupled.
TD- Transmitter Inverted DATA in. AC Coupled.
VeeT
Transmitter Ground (Common with Receiver Ground)
is an open collector/drain output, which should be pulled up with a 4.7k – 10k
Description
d
d
d
a
a
a
a
a
e