SN74LS294是TI公司的一款比率乘法器/分频器/定时器产品，SN74LS294是可编程分频器/数字定时器，本页介绍了SN74LS294的产品说明、应用、特性等，并给出了与SN74LS294相关的TI元器件型号供参考。
SN74LS294 - 可编程分频器/数字定时器 - 比率乘法器/分频器/定时器 - 特殊逻辑 - TI公司（Texas Instruments，德州仪器）
These programmable frequency dividers/digital timers contain 31 flip-flops plus 30 gates ('LS292) or 15 flip-flops plus 29 gates ('LS294) on a single chip. The count modulo is under digital control of the inputs provided.
Both types feature an active-low clear input to initialize the state of all flip-flops. To facilitate incoming inspection, test points are provided (TP1, TP2, and TP3 on the 'LS292 and TP on the 'LS294). These test points are not intended to drive system loads. Both types feature two clock inputs; either one may be used for clock gating. (See the function table below.)
A brief look at the digital timing capabilities of the 'LS292 will show that with a 1-MHz input frequency, programming for 210 will give a period of 1.024 ms, and 220 will give a period of 1.05 sec, 226 will give a period of 1.12 min, and 231 will give a period of 35.79 min.
These devices are easily cascadable giving limitless possibilities to timing delays that can be achieved.
- Count Divider Chain
- Digitally Programmable from 22 to 2n (n = 31 for 'LS292, n = 15 for 'LS294)
- Useable Frequency Range from DC to 30 MHz
- Easily Expandable
- Applications
- Frequency Division
- Digital Timing
