Datasheet

December 1990 3
Philips Semiconductors Product specification
Dual 4-bit synchronous binary counter 74HC/HCT4520
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 9 1CP
0
, 2CP
0
clock inputs (LOW-to-HIGH, edge-triggered)
2, 10 1
CP
1
, 2CP
1
clock inputs (HIGH-to-LOW, edge-triggered)
3, 4, 5, 6 1Q
0
to 1Q
3
data outputs
7, 15 1MR, 2MR asynchronous master reset inputs (active HIGH)
8 GND ground (0 V)
11, 12, 13, 14 2Q
0
to 2Q
3
data outputs
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.