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MC74HC390A

Dual 4−Stage Binary Ripple Counter with ÷2 and ÷5 Sections

ON Semiconductor 

CLOCK Aa 1

RESET a 2

QAa 3

CLOCK Ba 4

QBa 5

QCa 6

QDa 7

GND 8

16 VCC

15 CLOCK Ab

14 RESET b

13 QAb

12 CLOCK Bb

11 QBb

10 QCb

9 QDb

Figure 1. Pin Assignment

FUNCTION TABLE

Clock

AB

XX

X

X

Reset

H

L

L

Action

Reset

÷ 2 and ÷ 5

Increment

÷2

Increment

÷5

MC74HC390A

CLOCK A 1, 15

÷2

COUNTER

3, 13 QA

CLOCK B 4, 12

÷5

COUNTER

5, 11 QB

6, 10

7, 9

QC

QD

RESET 2, 14

PIN 16 = VCC

PIN 8 = GND

Figure 2. Logic Diagram

ORDERING INFORMATION

Device

Package

Shipping†

MC74HC390AN

PDIP−16

500 Units / Rail

MC74HC390ANG

PDIP−16

(Pb−Free)

500 Units / Rail

MC74HC390AD

SOIC−16

48 Units / Rail

MC74HC390ADG

SOIC−16

(Pb−Free)

48 Units / Rail

MC74HC390ADR2

SOIC−16

2500 Units / Reel

MC74HC390ADR2G

SOIC−16

(Pb−Free)

2500 Units / Reel

MC74HC390ADTR2

TSSOP−16*

2500 Units / Reel

MC74HC390ADTR2G

TSSOP−16*

2500 Units / Reel

MC74HC390AF

SOEIAJ−16

50 Units / Rail

MC74HC390AFG

SOEIAJ−16

(Pb−Free)

50 Units / Rail

MC74HC390AFEL

SOEIAJ−16

2000 Units / Reel

MC74HC390AFELG

SOEIAJ−16

(Pb−Free)

2000 Units / Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*This package is inherently Pb−Free.

http://onsemi.com

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