TC74HC123AP/AF/AFN

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74HC123AP,TC74HC123AF,TC74HC123AFN

Dual Retriggerable Monostable Multivibrator

The TC74HC123A is a high speed CMOS MONOSTABLE

technology.

It achieves the high speed operation similar to equivalent

LSTTL while maintaining the CMOS low power dissipation.

There are two trigger inputs,

A input (negative edge), and B

input (positive edge). These inputs are valid for a slow rise/fall

time signal (tr = tf = 1 s) as they are schmitt trigger inputs. This

device may also be triggered by using CLR input (positive

edge).

After triggering, the output stays in a MONOSTABLE state for

a time period determined by the external resistor and capacitor

(Rx, Cx ). A low level at the CLR input breaks this state. In the

MONOSTABLE state, if a new trigger is applied, it extends the

MONOSTABLE period (retrigger mode).

Limits for Cx and Rx are:

External capacitor, Cx: No limit

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features (Note)

• Low power dissipation

• Output drive capability: 10 LSTTL loads

• Pin and function compatible with 74LS123

Note:

In the case of using only one circuit, CLR should be tied to GND, Rx/Cx･Cx･Q･ Q should be tied to OPEN,

Note: xxxFN (JEDEC SOP) is not available in

Japan.

TC74HC123AP

TC74HC123AF

TC74HC123AFN

Weight

DIP16-P-300-2.54A

: 1.00 g (typ.)

SOP16-P-300-1.27A

: 0.18 g (typ.)

SOL16-P-150-1.27

: 0.13 g (typ.)