7493

更新时间： 2024-02-26 01:02:03

品牌	Logo	应用领域
美国国家半导体 - NSC		计数器
页数	文件大小	规格书
10页	136K
描述
Decade and Binary Counters

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技术参数
数据手册

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7493 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8536.69.40.40
风险等级：	5.61	其他特性：	PLASTIC, 94V-0
紧固方法：	SCREW	层数：	1
行数：	1	通路数：	3
额定电流：	30 A	额定电压：	300 V
安全认证：	UL; CSA	端子和端子排类型：	BARRIER STRIP TERMINAL BLOCK
线规：	10 AWG	Base Number Matches：	1

7493 数据手册

July 1992

DM5490/DM7490A, DM7493A

Decade and Binary Counters

General Description

Each of these monolithic counters contains four master-

slave flip-flops and additional gating to provide a divide-by-

two counter and a three-stage binary counter for which the

count cycle length is divide-by-five for the 90A and divide-

by-eight for the 93A.

described in the appropriate truth table. A symmetrical di-

vide-by-ten count can be obtained from the 90A counters by

connecting the Q output to the A input and applying the

input count to the B input which gives a divide-by-ten square

wave at output Q .

All of these counters have a gated zero reset and the 90A

also has gated set-to-nine inputs for use in BCD nine’s com-

plement applications.

Features

Typical power dissipation

145 mW

130 mW

Ð 90A

Ð 93A

To use their maximum count length (decade or four-bit bina-

ry), the B input is connected to the Q output. The input

count pulses are applied to input A and the outputs are as

Count frequency 42 MHz

Connection Diagrams

Dual-In-Line Package

TL/F/6533–1

Order Number DM5490J, DM5490W or DM7490AN

See NS Package Number J14A, N14A or W14B

Dual-In-Line Package

TL/F/6533–2

Order Number DM7493AN

See NS Package Number N14A

1995 National Semiconductor Corporation

TL/F/6533

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...10

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