The HC393 contain eight Flip-Flops SN54HC393 SN74HC393 and additional gating to implement two individual 4-bit Counters in a single package. The HC393 comprise two independent 4-bit binary Counters each having a clear (CLR) and a Clock (CLK) input. N-bit binary Counters CAN be implemented with each package, providing the capability of divide by 256. The HC393 have parallel outputs from each Counter stage so that any submultiple of the input count frequency is available for system Timing signals. The SN54HC393 is characterized for operation over the full military temperature range of 55C to 125C. The SN74HC393 is characterized for operation from 40C to 85C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN54HC393FK Rochester Electronics LLC Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, CMOS, CQCC20, CERAMIC, LCC-20
SN54HC393J Texas Instruments Dual 4-Bit Binary Counters 14-CDIP -55 to 125
SN54HC393 's PackagesSN54HC393 's pdf datasheet

SN54HC393 Pinout, Pinouts
SN54HC393 pinout,Pin out
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