MM54C90 datasheet(1/6 Pages) NSC

Part #	MM54C90

Description	4-Bit Decade, Binary Counter

PDF	6 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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1 / 6 page

TLF5889

February 1988

MM54C90MM74C90 4-Bit Decade Counter

MM54C93MM74C93 4-Bit Binary Counter

General Description

The

MM54C90MM74C90

decade

counter

and

the

MM54C93MM74C93 binary counter and complementary

MOS (CMOS) integrated circuits constructed with N- and

P-channel enhancement mode transistors The 4-bit decade

counter can reset to zero or preset to nine by applying ap-

propriate logic level on the R01 R02 R91 and R92 inputs

Also a separate flip-flop on the A-bit enables the user to

operate it as a divide-by-2 5 or 10 frequency counter The

4-bit binary counter can be reset to zero by applying high

logic level on inputs R01 and R02 and a separate flip-flop on

the A-bit enables the user to operate it as a divide-by-2 -8

or -16 divider Counting occurs on the negative going edge

of the input pulse

All inputs are protected against static discharge damage

Features

Y

Wide supply voltage range

3V to 15V

Y

Guaranteed noise margin

1V

Y

High noise immunity

045 VCC (typ)

Y

Low power

Fan out of 2

TTL compatiblity

driving 74L

Y

The

MM54C93MM74C93

follows

the

MM54L93

MM74L93 Pinout

Connection and Logic Diagrams

MM54C90MM74C90

Dual-In-Line Package

TLF5889 – 2

Top View

MM54C93MM74C93

Dual-In-Line Package

TLF5889 – 4

Top View

Order Number MM54C90 or MM74C93

M54C90MM74C90

TLF5889 – 1

MM54C93MM74C93

TLF5889 – 3

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

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Manufacturer	Part #	Datasheet	Description
Motorola, Inc	SN54LS290	205Kb / 7P	DECADE COUNTER; 4-BIT BINARY COUNTER
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ON Semiconductor	SN54-74LS290	74Kb / 5P	DECADE COUNTER; 4-BIT BINARY COUNTER
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Hitachi Semiconductor	HD74HC668	84Kb / 14P	Synchronous UP/Down Decade,4-bit binary Counter
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MM54C90 Datasheet(PDF) 1 Page - National Semiconductor (TI)

MM54C90 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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