The 74HC244 is identical in pinout to the LS244. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
This octal noninverting buffer/line driver/line receiver is designed to be used with 3−state memory address drivers, clock drivers, and other bus−oriented systems. The device has noninverting outputs and two active−low output enables.
The HC244 is similar in function to the HC240A.

Features
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 A
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard No. 7A
• ESD Performance: HBM  2000 V; Machine Model  200 V
• Chip Complexity: 136 FETs or 34 Equivalent Gates
• This is a Pb−Free Device