HI-8685_08 Datasheet, PDF(1/12 Page) Holt Integrated Circuits

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HI-8685_08 Datasheet, PDF (1/12 Pages) Holt Integrated Circuits – ARINC INTERFACE DEVICE

December 2008

HI-8685, HI-8686

ARINC INTERFACE DEVICE

ARINC 429 & 561 Serial Data to 16-Bit Parallel Data

DESCRIPTION

PIN CONFIGURATIONS (Top View)

The HI-8685 and HI-8686 are system components for

interfacing incoming ARINC 429 signals to 16-bit parallel

data using proven +5V analog/digital CMOS technology.

Both products incorporate the digital logic and analog line

receiver circuitry in a single device.

The receivers on the HI-8685 and the HI-8686 connect

directly to the ARINC 429 Bus and translate the incoming

signals to normal CMOS levels. Internal comparator levels

are set just below the standard 6.5 volt minimum data

threshold and just above the standard 2.5 volt maximum null

threshold. The -10 version of the HI-8685 allows the

incorporation of an external 10KW resistance in series with

each ARINC input for lightning protection without affecting

ARINC level detection.

Both products offer high speed 16-bit parallel bus interface,

a 32-bit buffer, and error detection for word length and parity.

A reset pin is also provided for power-on initialization.

FEATURES

! Automatic conversion of serial ARINC 429, 575 &

561 data to 16-bit parallel data

! High speed parallel 16-bit data bus

! Error detection - word length and parity

! Reset input for power-on initialization

! On-chip line receiver

! Input hysteresis of at least 2 volts

! Test lnputs bypass analog inputs

! Simplified lightning protection with the ability to

add 10 Kohm external series resistors

! Small, surface mount, plastic package options:

SOIC, PQFP and PLCC

! Industrial and extended temperature ranges

APPLICATIONS

! Avionics data communication

! Serial to parallel conversion

! Parallel to serial conversion

DATARDY

D15

D14

D13

D12

D11

D10

GND

6 HI-8685PSI 23

7 HI-8685PST 22

HI-8685PSI-10

9 HI-8685PST-10 20

Vcc

GAPCLK

TESTA

TESTB

RESET

RINB (-10)

RINA (-10)

ERROR

PARITY ENB

READ

HI-8685

28-Pin Plastic SOIC - WB Package

N/C - 1

D12 - 2

D11 - 3

D10 - 4

D9 - 5

D8 - 6

D7 - 7

D6 - 8

HI-8686PQI

HI-8686PQT

24 - RESET

23 - RINB-10

22 - RINB

21 - RINA

20 - RINA-10

19 - ERROR

18 - PARITY ENB

17 - N/C

HI-8686

32-Pin Plastic PQFP Package

(See page 8 for additional pin configurations)

(DS8685 Rev. N)

HOLT INTEGRATED CIRCUITS

www.holtic.com

12/08

▷