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54AC191 Datasheet PDF - National ->Texas Instruments

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Part Number54AC191 National-Semiconductor
National ->Texas Instruments National-Semiconductor
DescriptionUp/Down Counter with Preset and Ripple Clock
54AC191 Datasheet PDF : 54AC191 pdf       
54AC191D image

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


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