The SN74LS29x devices are programmable frequency dividers and digital timers contain 31 flip-flops plus 30 gates (in SN74LS292) or 15 flip-flops plus 29 gates (in SN74LS294) on a single chip. The count modulo is under digital control of the inputs provided.

Both types feature an active-low CLR clear input to initialize the state of all flip-flops. To facilitate the incoming inspection, test points are provided (TP1, TP2, and TP3 on the SN74LS292, and TP on the SN74LS294). These test points are not intended to drive system loads. Both types feature two clock inputs; either one may be used for clock gating.

A brief look at the digital timing capabilities of the SN74LS292 shows that with a 1-MHz input frequency, programming for 2¹⁰ gives a period of 1.024 ms, 2²⁰ gives a period of 1.05 sec, 2²⁶ gives a period of 1.12 min, and 2³¹ gives a period of 35.79 min.

These devices are easily cascadable, giving limitless possibilities to achievable timing delays.

• Count Divider Chain
• Digitally Programmable from 22 to 2n (n = 31 for SN74LS292 , n = 15 for SN74LS294)
• Useable Frequency Range from DC to 30 MHz
• Easily Expandable

• Technology Family
• LS
• Bits (#)
• 15
• Supply voltage (Min) (V)
• 4.75
• Supply voltage (Max) (V)
• 5.25
• Input type
• Bipolar
• Output type
• Push-Pull
• ICC (Max) (uA)
• 50000
• IOL (Max) (mA)
• 24
• IOH (Max) (mA)
• -1.2

SN74LS294的完整型号有：SN74LS294N，以下是这些产品的关键参数及官网采购报价：

SN74LS294N，工作温度：0 to 70，封装：PDIP (N)-16，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网SN74LS294N的批量USD价格：11.813（1000+）

14-24-LOGIC-EVM — 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。