74LS393

DM74LS393 Dual 4-Bit Binary Counter August 1986 Revised March 2000 DM74LS393 Dual 4-Bit Binary Counter General Description Each of these monolithic circuits contains eight masterslave flip-flops and additional gating to implement two individual four-bit counters in a single package. The DM74LS393 comprises two independent four-bit binary counters each having a clear and a clock input. N-bit binary counters can be implemented with each package providing the capability of divide-by-256. The DM74LS393 has parallel outputs from each counter stage so that any submultiple of the input count frequency is available for system-timing signals. Features s Dual version of the popular DM74LS93 s DM74LS393 dual 4-bit binary counter with individual clocks s Direct clear for each 4-bit counter s Dual 4-bit versions can significantly improve system densities by reducing counter package count by 50% s Typical maximum count frequency 35 MHz s Buffered outputs reduce possibility of collector commutation Ordering Code: Order Number DM74LS393M DM74LS373N Package Number M14A N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Counter Sequence (Each Counter) Count 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 H = HIGH Logic Level L = LOW Logic Le...