View mc74hc161 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC161A Presettable Counters MC54/74HC163A High–Performance Silicon–Gate CMOS The MC54/74HC161A and HCI63A are identical in pinout to the LS161 and LS163. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. J SUFFIX The HC161A and HC163A are programmable 4–bit binary counters with CERAMIC PACKAGE 16 CASE 620–10 asynchronous and synchronous reset, respectively. 1 • Output Drive Capability: 10 LSTTL Loads • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2.0 to 6.0 V N SUFFIX • Low Input Current: 1.0 µA PLASTIC PACKAGE 16 CASE 648–08 • High Noise Immunity Characteristic of CMOS Devices 1 • In Compliance with the Requirements