January 1995

2

Philips Semiconductors

Product specification

5-stage Johnson counter

HEF4017B

MSI

DESCRIPTION

The HEF4017B is a 5-stage Johnson decade counter with

an overriding asynchronous master reset input (MR).

The counter is advanced by either a LOW to HIGH

table).

while the counter is in states 5, 6, 7, 8 and 9, can be used

A HIGH on MR resets the counter to zero

Automatic code correction of the counter is provided by an

internal circuit: following any illegal code the counter

returns to a proper counting mode within 11 clock pulses.

Schmitt-trigger action in the clock input makes the circuit

highly tolerant to slower clock rise and fall times.

Fig.1 Functional diagram.

HEF4017BP(N):

16-lead DIL; plastic (SOT38-1)

HEF4017BD(F):

16-lead DIL; ceramic (cerdip) (SOT74)

HEF4017BT(D):

16-lead SO; plastic (SOT109-1)

( ): Package Designator North America

Fig.2 Pinning diagram.

PINNING

See Family Specifications

clock input (LOW to HIGH triggered)

clock input (HIGH to LOW triggered)

MR

master reset input

decoded outputs

carry output (active LOW)