M74HC4520 STMICROELECTRONICS [STMicroelectronics], M74HC4520 Datasheet - Page 2

• Manufacturer Part Number: M74HC4520
• Description: DUAL 4 BIT BINARY COUNTER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M74HC4520
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
Z : High Impedance
2/12
CLOCK
X
H
X
L
CLOCK ENABLE
INPUTS
H
X
X
L
PIN DESCRIPTION
11, 12, 13,
3, 4, 5, 6
PIN No
2, 10
7, 15
1, 9
14
16
8
CLEAR
H
L
L
L
L
L
L
2Q0 tO 2Q3 Data Outputs
1Q0 to 1Q3 Data Outputs
1CE, 2CE
SYMBOL
1CLOCK,
1CLEAR,
2CLOCK
2CLEAR
GND
Vcc
INCREMENT COUNTER
INCREMENT COUNTER
Clock Inputs (LOW to
HIGH, Edge-Triggered)
Clock Enable Inputs
Asynchronous Reset
Inputs (Active LOW)
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
Q0 THRU Q3=L
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
FUNCTION