The TC74HC373AFG is a high-speed CMOS octal D-type transparent latch manufactured by Toshiba Semiconductor and Storage. It is fabricated with silicon gate CMOS technology, achieving high-speed operation similar to equivalent Schottky TTL while maintaining the low power dissipation characteristic of CMOS. This device features three-state outputs, designed for use in bus-oriented applications.

Applications

• General purpose logic
• Microcomputer systems
• Memory address latching
• Data bus buffering
• Industrial control equipment
• Consumer electronics

Features

• High-speed operation: tpd = 13 ns (typ.) at VCC = 5V
• Low power dissipation: ICC = 4 μA (max.) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28 % VCC (min.)
• Output drive capability: 15 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 6 mA (min.)
• Balanced propagation delays: tPLH ≈ tPHL
• Wide operating voltage range: VCC = 2 V to 6 V
• Pin and function compatible with 74HC373

Benefits

• High-speed performance enables use in demanding, time-critical applications.
• Low power consumption reduces overall system power requirements, contributing to energy efficiency.
• High noise immunity ensures reliable operation in noisy environments.
• Large output drive capability allows direct interfacing with a wide range of devices.
• Wide operating voltage range provides flexibility in system design.
• Simplified design due to pin compatibility with industry-standard 74HC373.

Additional Details

The TC74HC373AFG has an octal configuration, meaning it contains eight individual D-type transparent latches. Each latch has a data input (D) and an enable input (LE). When the LE input is HIGH, the Q output follows the data input D. When the LE input is LOW, the data present at the D input is latched and retained at the Q output. The device also features an output enable (OE) input, which, when HIGH, forces the Q outputs to a high-impedance state. This allows multiple devices to share a common bus.

The operating temperature range is typically -40°C to +85°C, making it suitable for a wide range of environments. The package is a SOP20.