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®

ISO508

Uni-Directional

ISOLATED DIGITAL COUPLERS

FEATURES

q LOW POWER CONSUMPTION:

< 12mW per Channel Typ.

q 1500Vrms ISOLATION:

100% Tested by Partial Discharge

q ASYNCHRONOUS OR SYNCHRONOUS

OPERATION

q DOUBLE BUFFERED DESIGN FOR

EASY INTEGRATION INTO BUS-BASED

SYSTEMS

q TRI-STATE OUTPUTS

q 24-PIN PDIP OR GULL WING PACKAGES

q 2MWORDS/SEC TRANSFER RATE

q 1

APPLICATIONS

q PARALLEL ADCs/DACs

q DIGITAL INTERFACES

q DIGITAL TRANSMISSION

q GROUND-LOOP ISOLATION

ISO508

®

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

ISO508

ISO508

PDS-1422B

Printed in U.S.A. June, 1999

DESCRIPTION

ISO508 is an 8-channel, isolated, digital coupler based

on the Burr-Brown capacitive barrier technology. The

ISO508 has additional circuitry to ensure DC accuracy

and overcome the edge-sensitive nature of normal

capacitive devices even on power-up conditions. The

novel circuitry involved will restore the correct output

after a transient interruption should that be necessary.

The ISO508 is designed with input and output

buffers for ease of integration into a

µP bus system.

The output buffer has tri-state capability, and by

the use of OE, the output data bus lines can be

made to go high impedance. This feature of the

ISO508, which allows multiple access to a data

bus, requires extra circuitry when using an alterna-

tive solution.

ISO508 will transfer an 8-bit word at rates up to

2Mwords/s without the skew problems associated

in implementing this function with optocouplers.

The ISO508 is available in 24-pin PDIP or 24-pin

Gull Wing packages. Both are specified for opera-

tion from –40

°C to +85°C.

L

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DATA

IN

LEI

CONT

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S

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I

F

T

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I

F

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DATA

OUT

OE

LEO

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H

For most current data sheet and other product

information, visit www.burr-brown.com