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DESCRIPTION/ORDERING INFORMATION (CONTINUED)

CLR

C

ext

R

/C

ext

ext

R

B

A

Q

Q

SN74AHC123A-EP

DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR

SCLS703A – JULY 2006 – REVISED MARCH 2007

During power up, Q outputs are in the low state and Q outputs are in the high state. The outputs are glitch free,

without applying a reset pulse.

For additional application information on multivibrators, see the application report Designing With the

SN74AHC123A and SN74AHCT123A, literature number SCLA014.

ORDERING INFORMATION(1)

TA

PACKAGE(2)

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–55

°C to 125°C

SOIC – D

Tape and reel

SN74AHC123AMDREP

AHC123A-EP

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

Web site at www.ti.com.

(2)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

FUNCTION TABLE

(each multivibrator)

INPUTS

OUTPUTS

CLR

A

B

Q

Q

L

X

X

L

H

X

H

X

L(1)

H(1)

X

X

L

L(1)

H(1)

H

L

↑

H

↓

H

↑

L

H

(1)

These outputs are based on the assumption that the indicated

steady-state conditions at the A and B inputs have been set up long

enough to complete any pulse started before the setup.

LOGIC DIAGRAM, EACH MULTIVIBRATOR (POSITIVE LOGIC)

2

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