The 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 80mW. The circuit types have a Master Reset (MR) input which overrides all other inputs and asynchronously forces all outputs LOW. A Parallel Load input (PL) overrides clocked operations and asynchronously loads the data on the Parallel Data inputs (Pn) into the flip-flops. This preset feature makes the circuits usable as programmable counters. The circuits can also be used as 4-bit latches, loading data from the Parallel Data inputs when PL is LOW and storing the data when PL is HIGH.

Features :-

• Low Power Consumption - Typically 80mW
• 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

Specifications :-

• Supply Voltage : 4.75 - 5.25V
• Input HIGH Voltage : 2.0V
• Input LOW Voltage : 0.8V
• Input Clamp Diode Voltage : -1.5V
• Output HIGH Voltage : 3.5V
• Output LOW Voltage : 0.4V
• Short Circuit Current : -100mA
• Power Supply Current : 27mA

Package Includes :- 

1 X74LS197 Stage Presettable Ripple Counters IC (74197) DIP-14 Package