SN54LS292, SN54LS294, SN74LS292, SN74LS294 PROGRAMMABLE FREQUENCY DIVIDERS/DIGITAL TIMERS

PRODUCTION DATA documents contain information current as of publicationdate. Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily include testingof all parameters.

features

• 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

description

These programmable frequency dividers/digital timers contain 31 flip-flopsplus 30 gates ('LS292) or 15 flip-flops plus 29 gates ('LS294) on a singlechip. The count modulo is under digital control of the inputs provided.

Both types feature an active-low clear input to initialize the state ofall flip-flops. To facilitate incoming inspection, test points are provided(TP1, TP2, and TP3 on the 'LS292 and TP on the 'LS294). These test pointsare 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 showthat with a 1-MHz input frequency, programming for 2¹⁰ willgive a period of 1.024 ms, and 2²⁰ will give a period of 1.05sec, 2²⁶ will give a period of 1.12 min, and 2³¹will give a period of 35.79 min.

These devices are easily cascadable giving limitless possibilities to timingdelays that can be achieved.

View more information about generic part numbers:SN74LS292, SN74LS294

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

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