The UPD74HC373GS is a high-speed silicon gate CMOS octal D-type transparent latch manufactured by NEC. It features a three-state output and is designed for use in high-performance memory and microprocessor systems. This device is part of the 74HC series, known for its high speed and low power consumption compared to earlier TTL logic families.

Applications

• Address latches for microprocessor systems
• Data buffers
• Memory address decoding
• Output ports for microcontrollers
• Parallel-to-serial converters

Features

• High-speed operation: tpd = 11 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 4 μA (max) at VCC = 5 V
• Wide operating voltage range: VCC = 2 V to 6 V
• Three-state outputs for bus interface
• Fanout of 10 LSTTL loads
• Positive edge-triggered D-type latches

Benefits

• Improved system performance due to high-speed operation
• Reduced power consumption, extending battery life in portable devices
• Compatibility with a wide range of power supply voltages
• Easy integration into bus-oriented systems
• High drive capability for interfacing with multiple devices
• Simple data storage using transparent latch functionality

Additional Details

The UPD74HC373GS is available in a surface-mount package. It provides eight transparent latches, each with a D-type input and a three-state output. When the latch enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is low, the Q outputs are latched and retain the last data present before the transition. The output enable (OE) input controls the three-state outputs; when OE is low, the outputs are enabled, and when OE is high, the outputs are in a high-impedance state.