The ’HC193 devices are 4-bit synchronous, reversible, up/down binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when so instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters.

Features for the SN74HC193
Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 20 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Look-Ahead Circuitry Enhances Cascaded Counters
Fully Synchronous in Count Modes
Parallel Asynchronous Load for Modulo-N Count Lengths
Asynchronous Clear

Function Counter
Bits (#) 4
Technology family HC
Supply voltage (min) (V) 2
Supply voltage (max) (V) 6
Input type Standard CMOS
Output type Push-Pull
Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode
Operating temperature range (°C) -55 to 125
Rating Catalog