74LS193.pdf 54LS193 DM54LS193 DM74LS193 Synchronous 4-Bit Up Down Counters with Dual Clock June 1989 54LS193 DM54LS193 DM74LS193 Synchronous 4-Bit Up Down Binary Counters with Dual Clock General Description This circuit is a synchronous up down 4-bit binary counter These counters were designed to be cascaded without the Synchronous operation is provided by having all flip-flops need for external circuitry Both borrow and carry outputs clocked simultaneously so that the outputs change togeth- ……