HI-8788(2001) 查看數據表（PDF） - Holt Integrated Circuits

零件编号

产品描述 (功能)

生产厂家

HI-8788
(Rev.:2001)

ARINC INTERFACE DEVICES 16 bit parallel data converted to 429 & 561 serial data out

Holt Integrated Circuits 

WRITE

A0

XMIT CLK

status &

control

logic

DATA 16

BUS

16 to 32 bit

mux

32

32 bit

buffer

register

32

32 bit

shift

register

SLP1.5

word gap

counter

line

driver

XMT RDY

TXAOUT

TXBOUT

bit

counter

output

logic

561 SYNC

561 DATA

PARITY ENB

Figure 1. Block Diagram

FUNCTIONAL DESCRIPTION (Cont.)

The HI-8787 and HI-8788 have an on-chip line driver de-

signed to directly drive the ARINC 429 bus. The two ARINC

outputs (TXAOUT and TXBOUT) provide a differential volt-

age to produce a +10 volt One, a -10 volt Zero, and a 0 volt

Null. The slope of the ARINC outputs is controlled by the

SLP1.5 pin. If SLP1.5 is high, the output rise and fall time is

nominally 1.5µs. .If SLP1.5 is set low, the rise and fall times

are 10µs.

The HI-8787 has 37.5 ohms in series with each line driver

output. The HI-8788 has 10.0 ohms in series. The HI-8788

is for applications where external series resistance is

needed, typically for lightning protection devices.

A0 Load Data Bus

1

Word 1 D0 - D15

0

Word 2 D0 - D15

ARINC Bits

ARINC 1 - ARINC 16

ARINC 17 - ARINC 32

Figure 2. Order of transmitted data

HOLT INTEGRATED CIRCUITS

3

Share Link: