DM7490A datasheet(1/5 Pages) FAIRCHILD | Decade and Binary Counters

Part No.	DM7490A

Description	Decade and Binary Counters

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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DS006533

www.fairchildsemi.com

August 1986

Revised March 2000

DM7490A

Decade and Binary Counters

General Description

The DM7490A monolithic counter contains four master-

slave flip-flops and additional gating to provide a divide-by-

two counter and a three-stage binary counter for which the

count cycle length is divide-by-five.

The counter has a gated zero reset and also has gated set-

to-nine inputs for use in BCD nine’s complement applica-

tions.

To use the maximum count length (decade or four-bit

binary), the B input is connected to the QA output. The

input count pulses are applied to input A and the outputs

are as described in the appropriate Function Table. A sym-

metrical divide-by-ten count can be obtained from the

counters by connecting the QD output to the A input and

applying the input count to the B input which gives a divide-

by-ten square wave at output QA.

Features

s Typical power dissipation

145 mW

s Count frequency 42 MHz

Ordering Code:

Connection Diagram

Order Number

Package Number

Package Description

DM7490AN

N14A

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

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