The MC74AC161/74ACT161 and MC74AC163/74ACT163 are high−speed synchronous modulo−16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters.

The MC74AC161/74ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW. The MC74AC163/74ACT163 has a Synchronous Reset input that overrides counting and parallel loading and allows the outputs to be simultaneously reset on the rising edge of the clock.

Features

• Synchronous Counting and Loading

• High−Speed Synchronous Expansion

• Typical Count Rate of 125 MHz

• Outputs Source/Sink 24 mA

• ′ACT161 and ′ACT163 Have TTL Compatible Inputs

• These are Pb−Free Devices

MC74AC161D属于集成电路（IC） > 计数器，除法器。安森美半导体公司制造生产的MC74AC161D计数器，除法器计数器和除法器 IC 是数字逻辑器件，可对输入发生的逻辑转换进行计数，然后使用多个并行输出重新发送累加的计数，和/或生成单个输出信号转换，从而对应用某些整数数量输入信号转换进行响应。除了简单的事件计数，它们还可用于各种频率合成应用。