Datasheet

December 1990 3
Philips Semiconductors Product specification
Dual decade ripple counter 74HC/HCT390
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information” .
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 15 1
CP
0
, 2CP
0
clock input divide-by-2 section (HIGH-to-LOW, edge-triggered)
2, 14 1MR, 2MR asynchronous master reset inputs (active HIGH)
3, 5, 6, 7 1Q
0
to 1Q
3
flip-flop outputs
4, 12 1
CP
1
, 2CP
1
clock input divide-by-5 section (HIGH-to-LOW, edge triggered)
8 GND ground (0 V)
13, 11, 10, 9 2Q
0
to 2Q
3
flip-flop outputs
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.