MM74C90

更新时间： 2024-01-12 15:07:54

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		计数器
页数	文件大小	规格书
7页	57K
描述
4-Bit Decade Counter 4-Bit Binary Counter

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中文翻译

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技术参数
数据手册

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MM74C90 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	DIP, DIP14,.3	Reach Compliance Code：	unknown
风险等级：	5.92	Base Number Matches：	1

MM74C90 数据手册

October 1987

Revised January 1999

MM74C90 • MM74C93

4-Bit Decade Counter • 4-Bit Binary Counter

to operate it as a divide-by-2, -8, or -16 divider. Counting

occurs on the negative going edge of the input pulse.

General Description

The MM74C90 decade counter and the MM74C93 binary

counter and complementary MOS (CMOS) integrated cir-

cuits constructed with N- and P-channel enhancement

mode transistors. The 4-bit decade counter can reset to

zero or preset to nine by applying appropriate logic level on

the R₀₁, R₀₂, R₉₁and R₉₂inputs. Also, a separate flip-flop

All inputs are protected against static discharge damage.

Features

■ Wide supply voltage range: 3V to 15V

■ Guaranteed noise margin: 1V

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 R₀₁and

■ High noise immunity: 0.45 V_CC(typ.)

■ Low power compatibility:

Fan out of 2 TTL driving 74L

R₀₂, and a separate flip-flop on the A-bit enables the user

■ The MM74C93 follows the MM74L93 Pinout

Ordering Code:

Order Number

MM74C90N

Package Number

N14A

Package Description

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

MM74C93N

N14A

Connection Diagrams

Pin Assignments for DIP

MM74C93

MM74C90

Top View

DS005889.prf

www.fairchildsemi.com

12 3 4 5 6 7

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