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74HC390

Dual decade ripple counter

Philips Electronics 

Philips Semiconductors

Dual decade ripple counter

Product specification

74HC/HCT390

ORDERING INFORMATION

See “74HC/HCT/HCU/HCMOS Logic Package Information”.

PIN DESCRIPTION

PIN NO.

1, 15

2, 14

3, 5, 6, 7

4, 12

8

13, 11, 10, 9

16

SYMBOL

1CP0, 2CP0

1MR, 2MR

1Q0 to 1Q3

1CP1, 2CP1

GND

2Q0 to 2Q3

VCC

NAME AND FUNCTION

clock input divide-by-2 section (HIGH-to-LOW, edge-triggered)

asynchronous master reset inputs (active HIGH)

flip-flop outputs

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

ground (0 V)

flip-flop outputs

positive supply voltage

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

December 1990

3

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