74121 Datasheet (Fairchild Semiconductor)

74121, Monostable multivibrator

The DM74121 is a monostable multivibrator featuring both positive and negative edge triggering with complementary outputs.

An internal 2kΩ timing resistor is provided for design convenience minimizing component count and layout problems.

this device can be used with a single external capacitor.

Inpu

74121 Features

* s Triggered from active-HIGH transition or active-LOW transition inputs s Variable pulse width from 30 ns to 28 seconds s Jitter free Schmitt-trigger input s Excellent noise immunity typically 1.2V s Stable pulse width up to 90% duty cycle s TTL, DTL compatible s Compensated for VCC and temperature