CD74HCT20 Datasheet, Texas Instruments

3 Description
* LSTTL input logic compatible
  – VIL(max) = 0.8 V, VIH(min) = 2 V
* CMOS input logic compatible
  – II ≤ 1 µA at VOL.

This device contains two independent 4-input NAND gates. Each gate performs the Boolean function Y = A
* B
* C .