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1 Features

? LSTTL input logic compatible

– VIL(max) = 0.8 V, VIH(min) = 2 V

? CMOS input logic compatible

– II ≤ 1 μA at VOL, VOH

? Buffered inputs

? 4.5 V to 5.5 V operation

? Wide operating temperature range:

–55°C to +125°C

? Supports fanout up to 10 LSTTL loads

? Significant power reduction compared to LSTTL

logic ICs

2 Applications

? Alarm / tamper detect circuit

? S-R latch

3 Description

This device contains four independent 2-input NOR

gates. Each gate performs the Boolean function

Y = A + B in positive logic.