Datasheet

December 1990 3
Philips Semiconductors Product specification
Presettable synchronous 4-bit binary
counter; asynchronous reset
74HC/HCT161
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information” .
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1
MR asynchronous master reset (active LOW)
2 CP clock input (LOW-to-HIGH, edge-triggered)
3, 4, 5, 6 D
0
to D
3
data inputs
7 CEP count enable input
8 GND ground (0 V)
9
PE parallel enable input (active LOW)
10 CET count enable carry input
14, 13, 12, 11 Q
0
to Q
3
flip-flop outputs
15 TC terminal count output
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.