Mellanox Technologies Spectrum SN2740 Hardware User Manual page 95

Pin
7
8
9
10
11
12
13
14
15
16
17
18
19
20
a. T
FAULT
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 current 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.
b. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V
c. 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.
d. LOS is open collector output. Should be pulled up with 4.7kΩ – 10kΩ on host board to a volt-
age between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of sig-
nal.
C.3 RJ45 to DB9 Harness Pinout
In order to connect a host PC to the Console RJ45 port of the system, a RS232 harness cable
(DB9 to RJ45) is supplied.
Rev 2.2
Symbol Name
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 Ohms
Mellanox Technologies
Description
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a
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d
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