DM74LS192

更新时间： 2024-11-08 23:00:43

品牌	Logo	应用领域
美国国家半导体 - NSC		计数器时钟
页数	文件大小	规格书
8页	155K
描述
54LS192/DM74LS192 Up/Down Decade Counter with Separate Up/Down Clocks

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数据手册

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DM74LS192 数据手册

May 1992

54LS192/DM74LS192 Up/Down Decade Counter

with Separate Up/Down Clocks

General Description

The ’LS192 is an up/down BCD decade (8421) counter.

Separate Count Up and Count Down Clocks are used and in

either counting mode the circuits operate synchronously.

The outputs change state synchronous with the LOW-to-

HIGH transitions on the clock inputs.

Separate Terminal Count Up and Terminal Count Down out-

puts are provided which are used as the clocks for a subse-

quent stage without extra logic, thus simplifying multistage

counter designs. Individual preset inputs allow the circuits to

be used as programmable counters. Both the Parallel Load

(PL) and the Master Reset (MR) inputs asynchronously

override the clocks.

Connection Diagram

Logic Symbol

Dual-In-Line Package

TL/F/10178–2

Pin 16

Pin 8

GND

TL/F/10178–1

Order Number 54LS192DMQB, 54LS192FMQB,

54LS192LMQB, DM74LS192M or DM74LS192N

See NS Package Number E20A, J16A,

M16A, N16E or W16A

Mode Select Table

Pin Names

Description

Mode

Count Up Clock Input

(Active Rising Edge)

Reset (Asyn.)

Preset (Asyn.)

No Change

Count Up

Count Down Clock Input

(Active Rising Edge)

Asynchronous Master Reset Input

(Active HIGH)

Count Down

Asynchronous Parallel Load Input

(Active LOW)

HIGH Voltage Level

LOW Voltage Level

Immaterial

P0–P3

Q0–Q3

Parallel Data Inputs

Flip-Flop Outputs

Terminal Count Down (Borrow)

Output (Active LOW)

Terminal Count Up (Carry)

Output (Active LOW)

1995 National Semiconductor Corporation

TL/F/10178

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

12 3 4 5 6 7 8

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与DM74LS192相关器件

型号	品牌	获取价格	描述	数据表
DM74LS192J/A+	ETC	获取价格	Synchronous Up/Down Counter
DM74LS192M	NSC	获取价格	54LS192/DM74LS192 Up/Down Decade Counter with Separate Up/Down Clocks
DM74LS192MX	TI	获取价格	LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL DECADE COUNTER, PDSO16, 0.150 I
DM74LS192N	NSC	获取价格	54LS192/DM74LS192 Up/Down Decade Counter with Separate Up/Down Clocks
DM74LS192N/A+	ETC	获取价格	Synchronous Up/Down Counter
DM74LS192N/B+	ETC	获取价格	Synchronous Up/Down Counter
DM74LS193	FAIRCHILD	获取价格	Synchronous 4-Bit Binary Counter with Dual Clock
DM74LS193CW	FAIRCHILD	获取价格	Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL
DM74LS193J	TI	获取价格	IC,COUNTER,UP/DOWN,4-BIT BINARY,LS-TTL,DIP,16PIN,CERAMIC
DM74LS193J/A+	ETC	获取价格	Synchronous Up/Down Counter