HI-2579, HI-2581
PIN DESCRIPTIONS
Table 1. Pin Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Symbol
BUSA
BUSA
TXA
TXA
VDDA
RXENA
GNDA
VDDB
RXENB
GNDB
DNC
DNC
BUSB
BUSB
RXB
RXB
TXINHB
TXB
TXB
RXA
RXA
TXINHA
DNC
DNC
Function
Analog O/P
Analog O/P
Digital I/P
Digital I/P
Power
Digital I/P
Power
Power
Digital I/P
Power
−
−
Analog O/P
Analog O/P
Digital I/P
Digital I/P
Digital I/P
Digital I/P
Power
Power
Digital I/P
Digital I/P
−
−
Description
MIL-STD-1553 Bus A driver, negative signal (Transformer coupled or direct
coupled bus connections)
MIL-STD-1553 Bus A driver, positive signal (Transformer coupled or direct
coupled bus connections)
Transmitter A digital data input, non-inverted
Transmitter A digital data input, inverted
Transceiver A 3.3V supply
Receiver A enable. If low, forces both RXA and RXA low (HI-2579) or High
(HI-2581)
Transceiver A ground connection
Transceiver B 3.3V supply
Receiver B enable. If low, forces both RXB and RXB low (HI-2579) or High
(HI-2581)
Transceiver B ground connection
Not Used. Do Not Connect.
Not Used. Do Not Connect.
MIL-STD-1553 Bus B driver, positive signal (Transformer coupled or direct
coupled bus connections)
MIL-STD-1553 Bus B driver, negative signal (Transformer coupled or direct
coupled bus connections)
Receiver B output, inverted
Receiver B output, non-inverted
Transmit inhibit, Bus B. If high BUSB, BUSB outputs are disabled
Transmitter B digital data input, non-inverted
Transmitter B digital data input, inverted
Receiver A output, inverted
Receiver A output, non-inverted
Transmit inhibit, Bus A. If high BUSA, BUSA outputs are disabled
Not Used. Do Not Connect.
Not Used. Do Not Connect.
HOLT INTEGRATED CIRCUITS
3
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
