The HD74LS162P is a synchronous decade counter belonging to the 74LS series of integrated circuits. Manufactured by Hitachi, it's designed for counting applications in digital logic circuits. This device is a fully synchronous 4-bit decade counter, meaning that all flip-flops are clocked simultaneously, ensuring predictable and reliable operation.

Applications

• Frequency dividers
• Digital clocks and timers
• Event counters
• Address counters in memory systems
• Control circuits in industrial automation

Features

• Synchronous Counting: All flip-flops change state simultaneously on the positive edge of the clock pulse.
• Decade Counting: Counts from 0 to 9 and then resets.
• Direct Clear Input: Allows asynchronous clearing of the counter.
• Carry Output: Provides a signal when the counter reaches its maximum count, enabling cascading for higher-order counters.
• High-Speed Operation: Typical clock frequency of up to 25 MHz.
• Low Power Consumption: Characteristic of the LS (Low-power Schottky) TTL family.

Benefits

• Simplified Circuit Design: Synchronous operation reduces timing complexities.
• Accurate Counting: Reliable performance in various digital applications.
• Versatile Functionality: Suitable for a wide range of counting and timing needs.
• Easy Integration: Compatible with other TTL logic devices.
• Cascadable: Allows for creating counters of arbitrary length.

Additional Details

The HD74LS162P operates from a 5V power supply. It has a maximum supply voltage rating of 7V and a typical power dissipation of around 20mW. The device is housed in a 16-pin DIP (Dual In-line Package). The internal logic consists of four JK flip-flops and associated gating to implement the decade counting function. The synchronous clear input overrides all other inputs and resets the counter to zero. The carry output is asserted when the counter reaches a count of 9 and the count enable input is high. This output can be used to clock the next stage in a cascaded counter.