SN54HC393

SN54HC393, SN74HC393 DUAL 4ĆBIT BINARY COUNTERS D Wide Operating Voltage Range of 2 V to 6 V D Outputs Can Drive Up To 10 LSTTL Loads D Low Power Consumption, 80-µA Max ICC D Typical tpd = 13 ns D ±4-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Dual 4-Bit Binary Counters With Individual Clocks D Direct Clear for Each 4-Bit Counter D Can Significantly Improve System Densities by Reducing Counter Package Count by 50 Percent SCLS143D − DECEMBER 1982 − REVISED JULY 2003 SN54HC393 . . . J OR W PACKAGE SN74HC393 . . . D, DB, N, NS, OR PW PACKAGE (TOP VIEW) 1CLK 1CLR 1QA 1QB 1QC 1QD GND 1 2 3 4 5 6 7 14 VCC 13 2CLK 12 2CLR 11 2QA 10 2QB 9 2QC 8 2QD SN54HC393 . . . FK PACKAGE (TOP VIEW) 1CLR 1CLK NC VCC 2CLK description/ordering information The ’HC393 devices contain eight flip-flops and additional gating to implement two individual 4-bit counters in a single package. These devices 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 devices have parallel outputs from each counter stage so that any submultiple of the input count frequency is available for system timing signals. 1QA NC 1QB NC 1QC 3 2 1 20 19 4 18 5 17 6 16 7 15 8 14 9 10 11 12 13 2CLR NC 2QA NC 2QB 1QD GND NC 2QD 2QC NC − No internal connection ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube ...