TLF5988

February 1988

CD40192BMCD40192BC Synchronous

4-Bit UpDown Decade Counter

CD40193BMCD40193BC Synchronous

4-Bit UpDown Binary Counter

General Description

These updown counters are monolithic complementary

MOS (CMOS) integrated circuits The CD40192BM and

CD40192BC are BCD counters while the CD40193BM and

CD40193BC are binary counters

Counting up and counting down is performed by two count

inputs one being held high while the other is clocked The

outputs change on the positive-going transition of this clock

These counters feature preset inputs that are enabled when

load is a logical ‘‘0’’ and a clear which forces all outputs to

‘‘0’’ when it is at logical ‘‘1’’ The counters also have carry

and borrow outputs so that they can be cascaded using no

external circuitry

All inputs are protected against damage due to static dis-

Features

Y

Wide supply voltage range

3V to 15V

Y

High noise immunity

Y

Low power TTL compatibility

Fan out of 2

driving 74L

or 1 driving 74LS

Y

Carry and borrow outputs for easy expansion to N-bit

by cascading

Y

Asynchronous clear

Y

Equivalent to

MM54C192MM74C192

and MM54C193MM74C193

Connection Diagram

Dual-In-Line Package

TLF5988 – 1

Top View

Order Number CD40192B or CD40193

Cascading Packages

TLF5988 – 2

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A