ON Semiconductor MC74HC161: 4-Bit Binary Counter

The ON Semiconductor MC74HC161 is a high-performance, integrated circuit designed for counting applications in digital systems. It is a 4-bit binary counter that belongs to the 74HC family, known for its high-speed CMOS technology. This device is a versatile counter that features synchronous counting and asynchronous reset, making it ideal for a wide range of applications including timers, frequency dividers, and event counters.

Key Features

• Synchronous Counting: The MC74HC161 counts synchronously, which means that the outputs change precisely on the clock's rising edge, ensuring accurate and reliable counting for high-speed operations.
• Asynchronous Reset: An asynchronous reset input is provided which, when activated, sets all four bits of the counter to zero regardless of the clock input, allowing for quick and immediate resetting of the count.
• Expandability: The counter can be easily expanded by cascading additional counters, thanks to the ripple carry output. This feature allows for the construction of counters with longer bit lengths for more complex applications.
• Low Power Consumption: The MC74HC161 is designed to operate with low power consumption, making it suitable for battery-powered devices and other power-sensitive applications.
• Wide Operating Voltage Range: It has a wide operating voltage range from 2V to 6V, providing flexibility in various system designs and ensuring compatibility with TTL levels.
• Output Drive Capability: This counter can drive up to 10 LSTTL loads, which means it can directly interface with most logic families without additional buffering.

Applications

The MC74HC161 is highly suitable for a variety of digital applications. Common uses include:

• Digital clocks and watches
• Programmable dividers
• Frequency counters
• Timers and time-delay circuits
• Sequential state machines

With its robust feature set and ON Semiconductor's commitment to quality, the MC74HC161 is a reliable choice for designers and engineers who require a dependable 4-bit binary counter for their digital systems.