74LS123中文資料SYC數(shù)據(jù)手冊(cè)PDF規(guī)格書

General Description

The DM74LS123 is a dual retriggerable monostable multivibrator

capable of generating output pulses from a few

nano-seconds to extremely long duration up to 100% duty

cycle. Each device has three inputs permitting the choice of

either leading edge or trailing edge triggering. Pin (A) is an

active-LOW transition trigger input and pin (B) is an active-

HIGH transition trigger input. The clear (CLR) input terminates

the output pulse at a predetermined time independent

of the timing components. The clear input also serves

as a trigger input when it is pulsed with a low level pulse

transition (

). To obtain the best trouble free operation

from this device please read the operating rules as well as

the Fairchild Semiconductor one-shot application notes

carefully and observe recommendations.

Features

DC triggered from active-HIGH transition or active-LOW

transition inputs

Retriggerable to 100% duty cycle

Compensated for VCC and temperature variations

Triggerable from CLEAR input

DTL, TTL compatible

Input clamp diodes