74HC244 (Octal Bus Buffer With 3 State Outputs)

Overview

The 74HC244 is a high-speed CMOS octal bus buffer with 3-state outputs, designed for efficient data buffering and signal isolation in digital circuits. This IC integrates two independent 4-bit buffers, each with its own output enable control, allowing flexible data flow management. Its wide supply voltage range (2V to 6V) and low power consumption make it a versatile choice for both hobbyist projects and professional embedded systems. Whether you're driving LED displays, interfacing with microcontrollers, or isolating bus lines, the 74HC244 ensures reliable signal integrity with minimal current draw.

Key Features

• Octal Bus Buffer: 8 buffered lines in a single 20-pin DIP package, saving board space.
• 3-State Outputs: Each output can be high, low, or high-impedance, enabling bus sharing and multiplexing.
• Independent Enable Controls: Two enable inputs (active low) allow selective activation of each 4-bit section.
• Wide Supply Voltage: Operates from 2V to 6V, compatible with TTL and CMOS logic levels.
• Low Power Consumption: High-speed CMOS technology ensures minimal current draw, ideal for battery-powered devices.
• High Drive Capability: Sinks up to 7.8mA per output, sufficient to drive LEDs and other loads directly.

Technical Specifications

• Number of Elements: 2 (two 4-bit buffers)
• Bits per Element: 4
• Output Type: 3-State (high, low, high-impedance)
• Current - Output High/Low: 7.8mA, 7.8mA (sink/source)
• Supply Voltage Range: 2V to 6V
• Package / Case: 20-DIP (0.300", 7.62mm)
• Logic Family: 74HC (High-Speed CMOS)

Applications & Use Cases

• Microcontroller Interfacing: Drive multiple peripherals or sensors while protecting MCU pins.
• Bus Isolation: Separate data buses to prevent signal contention and noise.
• LED Matrix Driving: Source or sink current to light up LEDs in displays.
• Memory Address/Data Buffering: Strengthen signals for reliable communication in retro computing projects.
• Level Shifting: Interface between 3.3V and 5V logic systems (with appropriate supply).

What's Included

• 1 x 74HC244 Octal Bus Buffer IC (20-pin DIP)

Compatibility

• Logic Levels: Compatible with 5V TTL and 3.3V CMOS logic (when powered accordingly).
• Microcontrollers: Works with Arduino, Raspberry Pi (via level shifting), ESP32, STM32, and other popular boards.
• Breadboards: Standard 0.3-inch DIP package fits standard breadboards and prototyping PCBs.

MOKWN Recommendation

For Egyptian makers and engineers, the 74HC244 is an essential component for any digital electronics lab. Its robust design and wide compatibility make it perfect for educational projects, robotics, and industrial prototyping. Stock up today and ensure your data lines stay clean and reliable!