74AC191 - Up/Down Counter

Product Overview

Fairchild Semiconductor

Part number	74AC191
Manufacturer	Fairchild Semiconductor
File Size	139.27 KB
Description	Up/Down Counter
Datasheet	74AC191 Datasheet
Note	This datasheet PDF includes multiple part numbers: 74AC191, 74AC. Please refer to the document for exact specifications by model.
Additional preview pages of the 74AC191 datasheet.

The AC191 is a reversible modulo 16 binary counter.

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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Published: Apr 3, 2005 |