SN54LS197 - Motorola

SN54LS197 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. In the counting modes, state changes are initiated by the H.

Features

nsumption — Typically 80 mW
• High Counting Rates — Typically 70 MHz
• Choice of Counting Modes — BCD, Bi-Quinary, Binary
• Asynchronous Presettable
• Asynchronous Master Reset
• Easy Multistage Cascading
• Input Clamp Diodes Limit High Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC MR Q3 P3 P1 Q1 CP0 14 13 12 11 10 9 8 1234567 PL Q2 P2 P0 Q0 CP1 GND NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. PIN NAMES LOADING (Note a) HIGH LOW CP0 Clock (Active LOW Going Edge) 1.0 U.L. 1.5 U.L. Input to Divide-by-Two Section.