NXP 74LVT573PW: 3V Octal D-Type Transparent Latch with 3-State Outputs

The NXP 74LVT573PW is a high-performance, octal D-type transparent latch designed for 3.3V VCC systems, making it a crucial component in modern digital design where interfacing and data retention are required. Fabricated with NXP's advanced LVT (Low Voltage Technology) process, this IC combines high-speed operation with low power dissipation, effectively bridging the performance needs of today’s bus-oriented systems.

A primary feature of this latch is its eight transparent latches with 3-state outputs. Each latch features a D-type input and a corresponding output. When the Latch Enable (LE) input is held high, the outputs (Q) actively follow the data inputs (D). When LE is taken low, the data present at the inputs is latched and retained at the outputs until LE is brought high again, regardless of subsequent changes on the D inputs. This functionality is essential for temporary data storage and signal stabilization in microprocessor or bus interface applications.

The 3-state outputs are a critical asset for bus-driven systems. They can be placed in a high-impedance state (Hi-Z) by setting the Output Enable (OE) pin high. This effectively disconnects the latch's outputs from the bus, preventing contention and allowing other devices to drive the same line. This feature is indispensable for building multiplexed bus structures and shared data pathways, common in memory arrays and I/O port systems.

The device is characterized for operation from 3.0V to 3.6V, making it ideal for 3.3V systems and providing easy interfacing with modern microprocessors, FPGAs, and other peripherals. Despite its low-voltage operation, the inputs are 5V tolerant, allowing them to accept input voltages up to 5.5V without damage. This greatly simplifies interfacing with legacy 5V logic devices, offering significant design flexibility.

The 74LVT573PW is offered in a TSSOP-20 (PW) package, which is suitable for space-constrained PCB designs. With its robust feature set, including live insertion capability, and high drive capability (-32mA IOH / 64mA IOL), this IC is a reliable solution for a wide array of digital applications, from computing and networking to industrial control systems.

ICGOOODFIND: The NXP 74LVT573PW is an optimal choice for designers seeking a reliable, high-speed octal latch for 3.3V systems. Its combination of transparent latching, 3-state outputs, and 5V tolerant inputs provides the necessary flexibility and performance for efficient bus interfacing and data management.

Keywords: Octal Transparent Latch, 3-State Outputs, 3.3V Logic, 5V Tolerant Inputs, Bus Interface