74HC191 (4-Bit Counter)

Overview

The 74HC191 is a high-speed 4-bit binary up/down counter from the 74HC family, designed for synchronous counting in digital circuits. It offers both count-up and count-down modes, selectable via a dedicated input, and includes asynchronous parallel load capability for preset values. This versatile IC is ideal for applications requiring flexible counting, such as frequency dividers, industrial timers, and digital displays.

Key Features

• 4-bit binary up/down counter with synchronous counting
• Asynchronous parallel load for preset value initialization
• Count-up/count-down control via a single input
• Ripple clock output for cascading multiple stages
• Wide operating voltage (2V to 6V) compatible with TTL levels
• Low power consumption typical of CMOS technology
• High noise immunity and fast propagation delay

Technical Specifications

• Supply Voltage: 2V to 6V
• Maximum Clock Frequency: 25 MHz (at 5V)
• Propagation Delay: 17 ns (typical at 5V)
• Input/Output Compatibility: TTL, CMOS
• Package Options: DIP-16, SOIC-16
• Operating Temperature Range: -40°C to +125°C
• Logic Family: 74HC (High-Speed CMOS)

Applications & Use Cases

• Digital counters for frequency division and event counting
• Industrial automation for process control and sequencing
• Embedded systems for timing and control logic
• Educational projects for learning digital electronics
• Display drivers for up/down counting with 7-segment displays
• Robotics for position encoding and step counting

What's Included

• 1x 74HC191 4-bit up/down counter IC
• (If purchased individually, it comes in anti-static packaging; for bulk orders, tubes or reels may be used)

Compatibility

• Direct replacement for 74LS191 in most applications (check voltage compatibility)
• Works with Arduino, Raspberry Pi, and other microcontrollers (3.3V-5V logic levels)
• Compatible with standard breadboards and PCB designs
• Can be cascaded with other 74HC series counters for higher bit counts

MOKWN Recommendation

The 74HC191 is a reliable and cost-effective choice for your digital counting needs. Whether you're a student learning digital logic or a professional engineer developing industrial control systems, this IC offers the performance and flexibility required. At MOKWN, we ensure genuine components with fast delivery across Egypt. Add it to your cart today and bring your projects to life!