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74AC191 - Up/Down Counter

This page provides the datasheet information for the 74AC191, a member of the 74AC Up/Down Counter family.

Description

The AC191 is a reversible modulo 16 binary counter.

Features

  • synchronous counting and asynchronous presetting. The preset feature allows the AC191 to be used in programmable dividers. The Count Enable input, the Terminal Count output and the Ripple Clock output make possible a variety of methods of implementing multistage counters. In the counting modes, state changes are initiated by the rising edge of the clock. Features s ICC reduced by 50% s High speed.
  • 133 MHz typical count frequency s Synchronous counting s Asynchronous parallel load s Casca.

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Datasheet preview – 74AC191

Datasheet Details

Part number 74AC191
Manufacturer Fairchild Semiconductor
File Size 139.27 KB
Description Up/Down Counter
Datasheet download datasheet 74AC191 Datasheet
Additional preview pages of the 74AC191 datasheet.

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Full PDF Text Transcription

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74AC191 Up/Down Counter with Preset and Ripple Clock November 1988 Revised November 1999 74AC191 Up/Down Counter with Preset and Ripple Clock General Description The AC191 is a reversible modulo 16 binary counter. It features synchronous counting and asynchronous presetting. The preset feature allows the AC191 to be used in programmable dividers. The Count Enable input, the Terminal Count output and the Ripple Clock output make possible a variety of methods of implementing multistage counters. In the counting modes, state changes are initiated by the rising edge of the clock.
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