74F269数据手册集成电路（IC）的计数器除法器规格书PDF

描述 Description

General Description
The 74F269 is a fully synchronous 8-stage up/down counter featuring a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock.

特性 Features

■ Synchronous counting and loading
■ Built-in lookahead carry capability
■ Count frequency 100MHz
■ Supply current 113mA typ.
■ 300mil slimline package

简介

74F269属于集成电路（IC）的计数器除法器。由制造生产的74F269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。