74LS123中文資料仙童半導(dǎo)體數(shù)據(jù)手冊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.

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