The KK74HC05A is identical in pinout to the LS/ALS05. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALS TTL outputs. This device contains six independent gates, each of which performs the logic INVERT function. The open-drain outputs require external pull up resistors for proper logical operation. They may be connected to other open-drain outputs to implement active-high wired-AND functions.

• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA
• High Noise Immunity Characteristic of CMOS Devices