MC74HCT14A Datasheet, ON Semiconductor

* Output Drive Capability: 10 LSTTL Loads
* Outputs Directly Interface to CMOS, NMOS and TTL
* Operating Voltage Range: 2.0 to 6.0 V
* Low Input Current: .

in noisy environments. The MC74HC14A has CMOS−level input thresholds while the MC74HCT14A has TTL−Level input thresholds.