TLF9494

November 1994

54F74F190

UpDown Decade Counter with Preset and Ripple Clock

General Description

The ’F190 is a reversible BCD (8421) decade counter fea-

turing synchronous counting and asynchronous presetting

The preset feature allows the ’F190 to be used in program-

mable dividers The Count Enable input the Terminal Count

output and the Ripple Clock output make possible a variety

of methods of implementing multistage counters In the

counting modes state changes are initiated by the rising

edge of the clock

Features

Y

High-speed125 MHz typical count frequency

Y

Synchronous counting

Y

Asynchronous parallel load

Y

Cascadable

Commercial

Military

Package

Package Description

Number

74F190PC

N16E

16-Lead (0300 Wide) Molded Dual-In-Line

54F190DM (Note 2)

J16A

16-Lead Ceramic Dual-In-Line

74F190SC (Note 1)

M16A

16-Lead (0150 Wide) Molded Small Outline JEDEC

54F190FM (Note 2)

W16A

16-Lead Cerpack

54F190LM (Note 2)

E20A

20-Lead Ceramic Leadless Chip Carrier Type C

Note 1

Devices also available in 13

Note 2

Logic Symbols

Connection Diagrams

TLF9494 – 1

IEEEIEC

TLF9494 – 4

Pin Assignment for

DIP SOIC and Flatpak

TLF9494 – 2

Pin Assignment

for LCC

TLF9494 – 3

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A