The TC74VHC27 is an advanced high speed CMOS 3-INPUT
NOR GATE fabricated with silicon gate CMOS technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low
power dissipation.
The internal circuit is composed of 3 stages including buffer
output, which provide high noise immunity and stable output.
An input protection circuit ensures that 0 to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back up.
This circuit prevents device destruction due to mismatched
supply and input voltages.

FEATURES:
High Speed............
Low Power Dissipation......…....
tpd 4. Ins(typ.) at Vcc=5V
loc=2A(Max.) at Ta= 25°C
• High Noise Immunity. VNIH =VNIL = 28% Vcc (Min.)
Power Down Protection is provided on all inputs.
• Balanced Propagation DelaystpLH=tpHL
• Wide Operating Voltage Range...Vcc (opr) = 2V~5.5V
• Pin and Function Compatible with 74ALS27