Rev.2.00 Mar 30, 2006 page 1 of 6

HD74HC393

Dual 4-bit Binary Counters

REJ03D0625-0200

(Previous ADE-205-504)

Rev.2.00

Mar 30, 2006

Description

The HD74HC393 contain two 4-bit ripple carry binary counters, which can be cascaded to create a single divide-by-256

counter.

The HD74HC393 is incremented on the high to low transition (negative edge) of the clock input, and each has an

independent clear input. When clear is set high all four bits of each counter are set to a low level. This enables count

truncation and allows the implementation of divide-by-N counter configurations.

Features

• High Speed Operation: t

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: I

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74HC393P

DILP-14 pin

PRDP0014AB-B

(DP-14AV)

P

—

HD74HC393FPEL

SOP-14 pin (JEITA)

PRSP0014DF-B

(FP-14DAV)

FP

EL (2,000 pcs/reel)

Note:

Please consult the sales office for the above package availability.

Function Table

Clock

Clear

Outputs

X

H

L

H

L

No change

L

L

No change

L

No change

L

Advance to next state

Note:

1. H; High level, L; Low level, X; Irrelevant