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National ->Texas Instruments
54AC191F 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.

■ ICC reduced by 50%
■ High speed — 133 MHz typical count frequency
■ Synchronous counting
■ Asynchronous parallel load
■ Cascadable
■ Outputs source/sink 24 mA
■ Standard Military Drawing (SMD)
   — ’AC191: 5962-89749


other parts : 54AC191  54AC191D  54AC191L  
54AC191F PDF


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