74AC161 datasheet(2/12 Pages) STMICROELECTRONICS

部件名	74AC161

功能描述	SYNCHRONOUS PRESETTABLE 4-BIT COUNTER

PDF	12 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

2 / 12 page

INPUT AND OUTPUT EQUIVALENT CIRCUIT

LOGIC DIAGRAMS

PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCT ION

CLEAR

Master Reset

CLOCK

Clock Input (LOW-to-HIGH,

Edge- Triggered)

3, 4, 5, 6

A, B, C, D

Data Inputs

Count Enable Input

Count Enable Carry Input

LOAD

Parallel Enable Input

14, 13, 12,

QA to QD

Flip-Flop Outpus

CARRY

OUT

Terminal Count Output

GND

Ground (0V)

VCC

Positive Supply Voltage

TRUTH TABLE

INPUTS

OUTPUT S

FUNCT ION

CLEAR

LOAD

T E

CL OCK

LLLL

RESET TO ”0”

PRESET DATA

NO CHANGE

NO COUNT

NO CHANGE

NO COUNT

COUNT UP

COUNT

NO CHANGE

NO COUNT

NOTE:

X:Don’t Care

A,B, C,D: Logic level of data input

CARRY OUT=TE

• QA• QB • QC • QD

74AC161

2/12

74AC161 数据表(PDF) 2 Page - STMicroelectronics

74AC161 数据表(HTML) 2 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

数据表下载

链接网址

74AC161 数据表(PDF) 2 Page - STMicroelectronics

74AC161 数据表(HTML) 2 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

数据表 下载

链接网址

数据表下载