74F190 Datasheet | National Semiconductor

.. 54F 74F190 Up Down Decade Counter with Preset and Ripple Clock November 1994 54F 74F190 Up Down Decade Counter with Preset and Ripple Clock General Description The ’F190 is a reversible BCD (8421) decade counter featuring synchronous counting and asynchronous presetting The preset feature allows the ’F190 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 High-speed 125 MHz typical count frequency Synchronous counting Asynchronous...