M74HC4520M1R datasheet(2/12 Pages) STMICROELECTRONICS

部件名	M74HC4520M1R

功能描述	DUAL 4 BIT BINARY COUNTER

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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M74HC4520

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INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X : Don’t Care

Z : High Impedance

PIN No

SYMBOL

NAME AND FUNCTION

1, 9

1CLOCK,

2CLOCK

Clock Inputs (LOW to

HIGH, Edge-Triggered)

2, 10

1CE, 2CE

Clock Enable Inputs

3, 4, 5, 6

1Q0 to 1Q3

Data Outputs

7, 15

1CLEAR,

2CLEAR

Asynchronous Reset

Inputs (Active LOW)

11, 12, 13,

14

2Q0 tO 2Q3 Data Outputs

8

GND

Ground (0V)

16

Vcc

Positive Supply Voltage

INPUTS

FUNCTION

CLOCK

CLOCK ENABLE

CLEAR

H

L

INCREMENT COUNTER

L

INCREMENT COUNTER

X

L

NO CHANGE

X

L

NO CHANGE

L

NO CHANGE

H

L

NO CHANGE

X

H

Q0 THRU Q3=L

类似零件编号 - M74HC4520M1R

制造商	部件名	数据表	功能描述
STMicroelectronics	M74HC4520	270Kb / 13P	HC4518 DUAL DECADE COUNTER HC4520 DUAL 4 BIT BINARY COUNTER

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类似说明 - M74HC4520M1R

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