ON Semiconductor MC74AC161D: 4-Bit Binary Counter

The MC74AC161D is a high-performance, 4-bit binary counter from ON Semiconductor that features synchronous counting and asynchronous clearing capabilities. Designed for use in a wide array of electronic applications, this counter is part of the AC series, which is renowned for its high-speed operation and robust performance.

Constructed with advanced CMOS technology, the MC74AC161D ensures minimal power consumption while delivering fast count frequencies. This makes it an ideal choice for battery-operated devices, portable equipment, and any system where energy efficiency is a priority.

The device has a fully synchronous internal architecture, which allows the counter to increment on each rising edge of the clock signal. This synchronous design ensures precise timing and reliable operation, which is critical for applications requiring exact counting sequences. Additionally, the counter can be cleared to its zero state asynchronously by applying a high signal to the clear input, providing designers with flexibility in controlling the reset state of the counter.

The MC74AC161D features a standard 16-pin SOIC package, making it compatible with most PCB layouts and easy to integrate into existing designs. The pin configuration includes four output pins (Q0 to Q3) that represent the binary count, two count enable inputs (P and T), a clock input (CP), an asynchronous clear input (CLR), and other control and power supply pins.

Key specifications of the MC74AC161D include:

• Supply Voltage Range: 2.0V to 6.0V
• High-Speed Operation: fMAX = 145 MHz (typ) at VCC = 5.0V
• Low Static Power Dissipation: ICC = 4 µA (max) at TA = 25°C
• Fully Synchronous Counting and Asynchronous Clearing
• Output Drive Capability: 10 LSTTL Loads

ON Semiconductor's MC74AC161D is a versatile and reliable solution for digital counting applications. Whether used in instrumentation, process control systems, or digital timers, this binary counter offers the performance and efficiency needed for modern electronic designs.

For detailed information, refer to the MC74AC161D datasheet provided by ON Semiconductor, which contains comprehensive technical specifications, pin descriptions, timing diagrams, and application notes to assist in the integration of this counter into your next project.