UT54ACS193E

UT54ACS193E Synchronous 4-Bit Up-Down Dual Clock Counter July 2013 www.aeroflex.com/Logic Datasheet FEATURES  Look-ahead circuitry enhances cascaded counters  Fully synchronous in count modes  Parallel asynchronous load for modulo-N count lengths  Asynchronous clear  m CRH CMOS process - Latchup immune  High speed  Low power consumption  Wide power supply operating range of 3.0V to 5.5V  Available QML Q or V processes  16-lead flatpack  UT54ACS193E - SMD 5962-96566 DESCRIPTION The UT54ACS193E is a synchronous 4-bit, reversible up-down binary counter. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when instructed. Synchronous operation eliminates the output counting spikes normally associated with asynchronous counters. The outputs of the four flip-flops are triggered on a low-to-highlevel transition of either count input (Up or Down). The direction of the counting is determined by which count input is pulsed while the other count input is high. The counter is fully programmable. The outputs may be preset to either level by placing a low on the load input and entering the desired data at the data inputs. The outputs will change to agree with the data inputs independently of the count pulses. Asynchronous loading allows the counter to be used as moduloN divider by simply modifying the count length with the preset inputs. A clear input has been provided that forces all outpu...