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.