74S20 - DM74S20N Dual 4-Input NAND Gates

74HC20 - MC74HC20N Dual 4-Input NAND Gates

High-Speed CMOS Logic Triple 3-input NAND Gates.
The 74HC10 logic gates utilize silicon gate CMOS technology to achieve operating speeds similar to LSTTL gates with the low power consumption of standard CMOS integrated circuits. All devices have the ability to drive 10 LSTTL loads. The HC logic family is functionally pin compatible with the standard LS logic family.