The UPD74HC373C is a high-speed CMOS octal D-type transparent latch manufactured by NEC. This device features three-state outputs designed for use in bus-oriented applications. It is commonly used to temporarily store data and is ideal for interfacing between systems with different operating speeds or data transfer rates.

Applications

• Data Buffering: Used to buffer data between different sections of a digital system.
• Address Latching: Employed in memory systems to latch address signals.
• Microprocessor Systems: Interfacing with microprocessors for temporary data storage.
• Data Acquisition Systems: Storing data from analog-to-digital converters (ADCs).
• Industrial Control Systems: Controlling and monitoring various industrial processes.

Features

• High Speed Operation: Offers a fast propagation delay, suitable for high-frequency applications.
• Three-State Outputs: Allows the device to be connected directly to a bus.
• Low Power Consumption: Consumes minimal power, making it suitable for battery-powered applications.
• Wide Operating Voltage Range: Operates over a wide range of supply voltages (2V to 6V).
• CMOS Technology: Provides high noise immunity and low static power dissipation.
• 8-Bit Latch: Can latch eight bits of data simultaneously.

Benefits

• Improved System Performance: By providing fast data latching, the device enhances the overall performance of digital systems.
• Reduced Power Consumption: Its low power consumption contributes to energy efficiency.
• Enhanced Noise Immunity: The CMOS technology ensures reliable operation in noisy environments.
• Simplified System Design: The three-state outputs simplify interfacing with other devices on a bus.
• Increased Reliability: Designed for reliable operation over a wide range of temperatures and voltages.

Additional Details

The UPD74HC373C operates as a transparent latch when the Latch Enable (LE) input is high. When LE is high, the Q outputs follow the data at the D inputs. When LE transitions low, the data present at the D inputs at that time is latched, and the Q outputs remain stable, independent of further changes at the D inputs. The Output Enable (OE) input controls the three-state outputs. When OE is low, the outputs are enabled; when OE is high, the outputs are in a high-impedance state.

This device is commonly available in a DIP (Dual In-Line Package) or SOIC (Small Outline Integrated Circuit) package.