74HC161 4-Bit Synchronous Binary Counter IC

Overview

The 74HC161 is a high-speed, 4-bit synchronous binary counter from the 74HC CMOS logic family. It counts from 0 to 15 (binary 0000 to 1111) and is designed for precise digital counting, frequency division, and timing applications. Its synchronous operation ensures all outputs change simultaneously on the clock edge, eliminating glitches and making it ideal for reliable digital systems. With a wide operating voltage range of 2V to 6V and low power consumption, the 74HC161 is a versatile choice for hobbyists, students, and professionals working with microcontrollers like Arduino, ESP32, STM32, and Raspberry Pi.

Key Features

• 4-bit synchronous binary counter with outputs Q0 to Q3
• Synchronous counting – all outputs update on the same clock edge, preventing race conditions
• Parallel load capability – preset the counter to any value via data inputs
• Asynchronous master reset – instantly clear the counter to 0
• Wide operating voltage: 2V to 6V DC
• High-speed operation – typical clock frequency up to 36 MHz at 5V
• Low power consumption – typical quiescent current of 80 µA
• Standard DIP-16 package – easy for breadboarding and through-hole soldering
• Direct compatibility with TTL logic levels when powered at 5V

Technical Specifications

• Part Number: 74HC161
• Logic Family: 74HC CMOS
• Counter Capacity: 4-bit (0 to 15)
• Counting Mode: Synchronous (up counter)
• Operating Voltage: 2V to 6V DC
• Package: DIP-16 (Through-Hole)
• Propagation Delay: 20 ns typical at 5V
• Maximum Clock Frequency: 36 MHz (typical at 5V)
• Input/Output Compatibility: TTL compatible at 5V
• Operating Temperature Range: -40°C to +85°C

Applications & Use Cases

• Digital counters – event counting, product counting on conveyor belts
• Frequency dividers – divide clock signals for timers and clocks
• Timing circuits – create precise delays or time-based triggers
• State machines – sequential logic in control systems
• Embedded systems – expand I/O capabilities or interface with microcontrollers
• Educational projects – teach binary counting and digital logic
• Robotics – motor encoder pulse counting or position feedback

What's Included

• 1x 74HC161 4-Bit Synchronous Binary Counter IC (DIP-16)

Compatibility

• Works with Arduino, ESP32, STM32, Raspberry Pi, and other 3.3V/5V logic systems
• Can be used on breadboards, PCBs, and with standard through-hole soldering
• Pair with 74HC-series logic ICs (e.g., 74HC00, 74HC04) and 7-segment displays for complete counter projects

MOKWN Recommendation

The 74HC161 is a must-have for any digital electronics enthusiast. Its synchronous design ensures clean, glitch-free counting, making it perfect for projects where reliability is key. Whether you're building a frequency counter, a timer, or a simple LED sequencer, this IC delivers consistent performance. At MOKWN, we stock genuine 74HC161s at competitive prices, ready to ship across Egypt. Add one to your cart today and take your digital projects to the next level!