74LS197 Datasheet (Motorola) - 4-STAGE PRESETTABLE RIPPLE COUNTERS

74LS197, 4-STAGE PRESETTABLE RIPPLE COUNTERS

The LS196 and LS197 are asynchronously presettable decade and binary ripple counters.

The LS196 Decade Counter is partitioned into divide-by-two and divide-by-five sections while the LS197 is partitioned into divide-by-two and divideby-eight sections, with all sections having a separate Clock input.

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 MHz and power dissipation of only 80 mW.

74LS197 Features

* 8 NOTES: 1. DIMENSIONS A" AND B" ARE DATUMS AND T" IS A DATUM SURFACE. 2. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 3. 4. CONTROLLING DIMENSION: MILLIMETER. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 5. MAXIMUM MOLD PROTRU