74LS197 PDF File ( Datasheet )

4-STAGE PRESETTABLE RIPPLE COUNTERS The SN54, 74LS196 decade counter is partitioned into divide-by-two and divide-by-five sections which can be combined to count either in BCD (8, 4, 2, 1) sequence or in a bi-quinary mode producing a 50% duty cycle output. The SN54, 74LS197 contains divide-by-two and divide-by-eight sections which can be combined to form a modulo-16 binary counter. Low Power Schottky technology is used to achieve typical count rates of 70 MH- and power dissipation of only 80 mW.