74HC373 (Octal D Transparent Latch 3-State)

Overview

The 74HC373 is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented applications. It provides a simple and efficient way to store and control data in digital systems, making it an essential component for microcontroller interfacing, data buffering, and address latching. Whether you're building a memory expansion module, a data acquisition system, or a complex robotics controller, the 74HC373 ensures reliable data storage and transfer in your projects.

Key Features

• Octal D-Type Transparent Latch: Contains eight latches with D-type inputs, allowing simultaneous data capture and storage.
• 3-State Outputs: Each output can be independently set to high, low, or high-impedance (Hi-Z) state, enabling connection to shared data buses without conflict.
• Transparent Data Flow: When the latch enable (LE) input is high, data passes directly through to the outputs; when low, the outputs hold the last data.
• Output Enable Control: A dedicated output enable (OE) input controls the 3-state outputs, allowing easy bus isolation.
• High-Speed Operation: Typical propagation delay of 12 ns, compatible with high-frequency digital circuits.
• Wide Operating Voltage: Operates from 2V to 6V, making it compatible with both 3.3V and 5V logic systems.
• Low Power Consumption: CMOS technology ensures minimal power draw, ideal for battery-powered projects.
• Standard Logic Compatibility: Directly interfaces with TTL, CMOS, and other standard logic families.

Technical Specifications

• Logic Family: HC (High-Speed CMOS)
• Number of Channels: 8 (Octal)
• Latch Type: D-type, transparent
• Output Type: 3-State
• Supply Voltage (Vcc): 2.0V to 6.0V
• Propagation Delay (tpd): 12 ns (typical) at 5V
• Output Current: ±5.2 mA (at 5V)
• Operating Temperature Range: -40°C to +85°C
• Package Options: DIP-20, SOIC-20, TSSOP-20 (depending on variant)
• Pin Count: 20

Applications & Use Cases

• Address Latching: Use with microcontrollers to latch address lines for memory expansion (e.g., with 8085 or 8051 systems).
• Data Buffering: Isolate data buses in multi-processor or peripheral systems to prevent data corruption.
• Data Registers: Store data temporarily in digital circuits, such as in display drivers or input/output expansion.
• Bus Interfacing: Interface between different logic levels or buses, especially in mixed-voltage systems.
• Robotics & Automation: Manage sensor data and control signals in robotic control systems.
• Educational Projects: Ideal for learning about latches, flip-flops, and bus systems in electronics courses.

What's Included

• 1x 74HC373 Octal D Transparent Latch IC (DIP-20 package)

Compatibility

• Microcontrollers: Compatible with Arduino, Raspberry Pi (with level shifting), ESP32, STM32, and other 3.3V/5V logic devices.
• Logic Families: Interfacing with TTL, CMOS, and other HC/HCT logic ICs.
• Breadboards: Fits standard 0.1-inch (2.54mm) breadboards and perfboards.

MOKWN Recommendation

The 74HC373 is a versatile and reliable logic IC that every electronics enthusiast and professional should have in their toolkit. Its ability to latch data and provide 3-state outputs makes it invaluable for projects involving memory expansion, data buses, and multi-device communication. At MOKWN, we ensure you receive genuine, high-quality components that meet industry standards. Whether you're a student, hobbyist, or engineer, the 74HC373 will simplify your digital design challenges. Order today and elevate your projects with dependable data management.