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HEF4738

IEC/IEEE bus interface

Philips Electronics 

Philips Semiconductors

IEC/IEEE bus interface

Product specification

HEF4738V

LSI

DESCRIPTION

The HEF4738V is an implementation of the IEC-bus as

described in IEC report 66 CO 22 (interface system for

programmable measuring apparatus) as well as in IEEE

standard 488-1975 (standard digital interface for

programmable instrumentation).

Together with bus-drivers, level converters and

multiplexers it is suitable for connecting electronic

programmable and non-programmable equipment to an

IEC/IEEE interface bus.

All inputs have standard HE4000B family levels.

In the circuit the following standard interface functions are

incorporated:

• Complete source handshake (subset SH1)

• Complete acceptor handshake (subset AH1)

• Basic talker with serial poll and talk-only mode (when It

= LOW, subset T1; It = HIGH, subset T5)

• Basic listener with listen-only mode (when It = LOW,

subset L1; It = HIGH, subset L3)

• Complete service request (subset SR1)

• Complete remote local (subset RL1)

• Remote parallel poll configuration (subset PP1)

• Complete device clear (subset DC1)

• Complete device trigger (subset DT1)

• Some controller facilities

Fig.1 Basic IEC/IEEE bus interface using the HEF4738V.

SUPPLY VOLTAGE

RATING

−0,5 to 18

RECOMMENDED OPERATING

4,5 to 12,5 V

FAMILY DATA, IDD LIMITS category LSI

See Family Specifications

January 1995

2

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