74HC373D – NXP

Overview

The NXP 74HC373D is a high-speed, octal D-type latch featuring 3-state outputs, crucial for buffering and data demultiplexing in digital systems. Its primary function is to store data on the rising edge of the latch enable signal, providing a stable output until the next active edge. A key design consideration when implementing this device is managing the output enable (OE) pin; while it facilitates bus contention avoidance by placing outputs in a high-impedance state, improper control can lead to unintended data propagation or bus conflicts in complex multiplexed architectures.

Key Features

• Octal D-type latch with 3-state outputs
• High speed propagation delay (tpd): 12 ns (typ.) at VCC = 6.0 V
• Low static power dissipation: ICC = 4.0 µA (max) at 25°C
• Balanced propagation delays (tPLH ≈ tPHL)
• Wide operating voltage range: 2.0 V to 6.0 V
• Standard SOIC-16 package (10.3mm x 7.5mm x 1.5mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Data buffering and storage in microcontrollers
• Output stage for address or data buses in memory systems
• Signal multiplexing and demultiplexing in communication interfaces
• State retention in control logic for sequential operations