The 54LS161A/BEAJC is a synchronous 4-bit binary counter from the 54LS series, manufactured by Freescale Semiconductor (now NXP). It belongs to the Low-power Schottky TTL (Transistor-Transistor Logic) family, known for its low power consumption and moderate speed. This device can count in binary sequence and has features like synchronous clearing and parallel loading, making it suitable for a wide range of counting and sequencing applications.

Applications

• Frequency Dividers: Used to divide input frequencies by a specific factor.
• Timers: Employed in timer circuits for generating precise time intervals.
• Sequence Generators: Used to generate specific sequences of binary numbers.
• Digital Clocks: Utilized in digital clock circuits for counting seconds, minutes, and hours.
• Address Counters: Used as address counters in memory systems.

Features

• Synchronous Counting: All flip-flops change state simultaneously on the rising edge of the clock pulse.
• Synchronous Clearing: The counter can be reset to zero synchronously with the clock pulse.
• Parallel Loading: The counter can be loaded with a specific binary value synchronously with the clock pulse.
• Carry Output: A carry output is provided for cascading counters to increase the counting range.
• Low-Power Schottky TTL Technology: Provides low power consumption and moderate speed.

Benefits

• Versatile Counting Functionality: Offers a wide range of counting and sequencing capabilities.
• Precise Timing: Synchronous operation ensures precise timing and control.
• Easy to Cascade: Carry output simplifies cascading counters for larger counting ranges.
• Low Power Consumption: Low-power Schottky TTL technology minimizes power consumption.
• Cost-Effective Solution: Offers a cost-effective solution for implementing counting functions.

Additional Details

The 54LS161A/BEAJC is typically available in a DIP (Dual In-line Package). It requires a clock input, a clear input, a load enable input, and four data inputs for parallel loading. The output is a 4-bit binary count. The 'LS' designation indicates Low-power Schottky TTL, which offers a good balance between speed and power consumption compared to standard TTL or the 'F' series. It has a supply voltage range of 4.5V to 5.5V.