HD74LS390 Просмотр технического описания (PDF) - Renesas Electronics

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HD74LS390

Dual Decade Counters

Renesas Electronics 

HD74LS390

Dual Decade Counters

REJ03D0485-0400

Rev.4.00

May 10, 2006

This circuit contains eight master-slave flip-flops and additional gating to implement two individual four-bit counters.

The HD74LS390 incorporates dual divide-by-two and divide-by-five counters, which can be used to implement cycle

lengths equal to any whole and / or cumulative multiples of 2 and / or 5 up to divide-by-100. When connected as a bi-

quinary counter, the separate divide-by-two circuit can be used to provide symmetry (a square wave) at the final output

stage.

Features

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

HD74LS390P

DILP-16 pin

PRDP0016AE-B

P

(DP-16FV)

HD74LS390FPEL SOP-16 pin (JEITA)

PRSP0016DH-B

(FP-16DAV)

FP

Note: Please consult the sales office for the above package availability.

Taping Abbreviation

(Quantity)

—

EL (2,000 pcs/reel)

Pin Arrangement

1A 1

1Clear 2

1QA

Output

3

1B 4

1QB 5

Outputs 1QC 6

1QD 7

GND 8

CLR

1QA

1A

1B

1QB

1QC

1QD

CLR

2QA

2A

2B

2QB

2QC

2QD

16 VCC

15 2A

14 2Clear

13

2QA

Output

12 2B

11 2QB

10 2QC Outputs

9 2QD

(Top view)

Rev.4.00, May 10, 2006, page 1 of 5

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