View mc74hc27 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC27 Triple 3-Input NOR Gate High–Performance Silicon–Gate CMOS The MC54/74HC27 is identical in pinout to the LS27. The device inputs J SUFFIX are compatible with standard CMOS outputs; with pullup resistors, they are CERAMIC PACKAGE 14 compatible with LSTTL outputs. CASE 632–08 1 • Output Drive Capability: 10 LSTTL Loads • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2 to 6 V N SUFFIX PLASTIC PACKAGE • Low Input Current: 1 µA 14 CASE 646–06 • High Noise Immunity Characteristic of CMOS Devices • In Compliance with the Requirements Defined by JEDEC Standard 1 No. 7A D SUFFIX • Chip Complexity: 42 FETs or 10.5 Equivalent Gates 14 SOIC PACKAGE 1 CASE 751A–03 LOGIC DIAGRAM ORDERING INFORMAT