Holt Integrated Circuits
30
Table 8 – J4 Connector Pins
20 Pin
NAME
DESCRIPTION
1
CHANNEL 0 APOS
MIL-STD-1553 CH0 A+ (BUSA)
2
CHANNEL 0 ANEG
MIL-STD-1553 CH0 A- (nBUSA)
3
Chassis GND
Mounting screw – no other connection.
4
CHANNEL 0 BPOS
MIL-STD-1553 CH0 B+ (BUSB)
5
CHANNEL 0 BNEG
MIL-STD-1553 CH0 B- (nBUSB)
6
Chassis GND
Mounting screw – no other connection.
7
CHANNEL1 APOS
MIL-STD-1553 CH1 A+
8
CHANNEL 1 ANEG
MIL-STD-1553 CH1 A-
9
Chassis GND
Mounting screw – no other connection.
10
CHANNEL 1 BPOS
MIL-STD-1553 CH1 B+
11
CHANNEL 1 BNEG
MIL-STD-1553 CH1 B-
12
Chassis GND
Mounting screw – no other connection.
13
CH0INHBIT0
Channel 0 Transmit Inhibit. 10K pull-up.
Connects to an inverter which Inverted
direct connect to 2130 inhibit pins.
14
CH0 BCENAB
Channel 0 BC Enable. 10K pull-up.
15
CH0 BCTRIG
Channel 0 BC Trigger. 10K pull-up.
16
SPARE INPUT
Unused.
17
CH1INHBIT1
Channel 0 Transmit Inhibit. 10K pull-up.
Inverted direct connect to 2130 inhibit
pins.
18
CH1 BCENAB
Channel 1 BC Enable. 10K pull-up.
19
CH1 BCTRIG
Channel 1 BC Trigger. 10K pull-up.
20
Logic GND