December 1990

3

Philips Semiconductors

Product specification

Dual decade ripple counter

74HC/HCT390

ORDERING INFORMATION

See

PIN DESCRIPTION

PIN NO.

SYMBOL

NAME AND FUNCTION

1, 15

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

flip-flop outputs

4, 12

clock input divide-by-5 section (HIGH-to-LOW, edge triggered)

8

GND

ground (0 V)

13, 11, 10, 9

flip-flop outputs

16

positive supply voltage

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.