PHILIPS 74HC/HCT161 Presettable synchronous 4-bit binary counter; asynchronous reset handbook

This document describes the features of the 74HC/HCT161 integrated circuit, including synchronous counting and loading, n-bit cascading count enable inputs, positive-edge triggered clock, asynchronous reset, etc. They are high-speed Si-gate CMOS devices that are pin compatible with low power Schottky TTL (LSTTL). They can be used for high-speed counting.