TLF5950

March 1988

CD4017BMCD4017BC Decade CounterDivider

with 10 Decoded Outputs

CD4022BMCD4022BC Divide-by-8 CounterDivider

with 8 Decoded Outputs

General Description

The CD4017BMCD4017BC is a 5-stage divide-by-10 John-

son counter with 10 decoded outputs and a carry out bit

The CD4022BMCD4022BC is a 4-stage divide-by-8 John-

son counter with 8 decoded outputs and a carry-out bit

These counters are cleared to their zero count by a logical

‘‘1’’ on their reset line These counters are advanced on the

positive edge of the clock signal when the clock enable sig-

nal is in the logical ‘‘0’’ state

The configuration of the CD4017BMCD4017BC and

CD4022BMCD4022BC permits medium speed operation

and assures a hazard free counting sequence The 108

decoded outputs are normally in the logical ‘‘0’’ state and go

to the logical ‘‘1’’ state only at their respective time slot

Each decoded output remains high for 1 full clock cycle

The carry-out signal completes a full cycle for every 108

clock input cycles and is used as a ripple carry signal to any

succeeding stages

Features

Y

Wide supply voltage range

30V to 15V

Y

High noise immunity

Y

Low power

Fan out of 2 driving 74L

TTL compatibility

or 1 driving 74LS

Y

Medium speed operation

50 MHz (typ)

Y

Low power

10 mW (typ)

Y

Fully static operation

Applications

Y

Automotive

Y

Instrumentation

Y

Medical electronics

Y

Alarm systems

Y

Industrial electronics

Y

Remote metering

Connection Diagrams

CD4017B

Dual-In-Line Package

TLF5950 – 1

Top View

CD4022B

Dual-In-Line Package

TLF5950 – 2

Top View

Order Number CD4017B or CD4022B

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A