Philips hef4022b DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

For a complete data sheet, please also download:

•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC

•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC

HEF4022B
MSI

4-stage divide-by-8 Johnson
counter

Product specification
File under Integrated Circuits, IC04

January 1995

Philips Semiconductors Product specification

4-stage divide-by-8 Johnson counter

DESCRIPTION

The HEF4022B is a 4-stage divide-by-8 Johnson counter
with eight spike-free decoded active HIGH outputs (O0 to
O7), an active LOW output from the most significant
flip-flop (O
(CP0, CP1) and an overriding asynchronous master reset
input (MR).

The counter is advanced by either a LOW to HIGH
transition at CP0 while CP1 is LOW or a HIGH to LOW
transition at CP1 while CP0 is HIGH (see also function
table). Either CP

), active HIGH and active LOW clock inputs

4-7

or CP1 may be used as clock input to the

0

HEF4022B

MSI

counter and the other clock input may be used as a clock

O

enable input. When cascading counters, the
which is LOW while the counter is in states, 4, 5, 6 and 7,
can be used to drive the CP0input of the next counter.

A HIGH on MR resets the counter to zero
(O0= O

= HIGH; O1 to O7 = LOW) independent of the

4-7

clock inputs (CP0, CP1).
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.

output,

4-7

Fig.2 Pinning diagram.

PINNING

CP
CP

O
1

clock input (LOW to HIGH; edge-triggered)

clock input (HIGH to LOW; edge-triggered)
MR master reset input
O
O

to O

0
4-7

7

decoded outputs

carry output (active LOW)

Fig.1 Functional diagram.

HEF4022BP(N): 16-lead DIL; plastic

(SOT38-1)

HEF4022BD(F): 16-lead DIL; ceramic (cerdip)

(SOT74)

HEF4022BT(D): 16-lead SO; plastic

(SOT109-1)

( ): Package Designator North America

FAMILY DATA, IDDLIMITS category MSI

See Family Specifications

January 1995 2

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January 1995 3

Philips Semiconductors Product specification

4-stage divide-by-8 Johnson counter

Fig.3 Logic diagram.

HEF4022B

MSI