SN74LVC573APWT

Latches Overview

The SN74LVC573APWT is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates from a supply voltage of 1.65 V to 3.6 V and accepts input voltages up to 5.5 V. The device features a maximum propagation delay of 6.9 ns at 3.3 V and typical output ground bounce of 2 V. It provides high drive current capabilities, supporting loads up to 24 mA. The component includes Ioff circuitry for partial power-down protection and exhibits robust ESD performance exceeding JESD standards.

Latches Feature Summary

• Features 3-state outputs designed for driving highly capacitive or low-impedance loads without interface components.
• Includes Ioff circuitry that disables outputs to prevent damaging backflow currents during partial power-down modes.
• Inputs are tolerant to 5.5 V, allowing mixed-mode signal operation between 5-V and 3.3-V systems.

Latches Applications

• Servers
• PC and notebook computers
• Network switches
• Health and fitness wearables

Latches Procurement Notes

Verify the specific package variant matches the required PCB footprint, as the PW package denotes TSSOP. Confirm the 'T' suffix indicates small tape-and-reel packaging rather than tube distribution. Ensure the orderable part number aligns with the desired manufacturing revision and lead finish specifications provided in the official addendum.

Latches Selection Notes

Select this component when designing bus interfaces requiring data retention or latching functions. It is suitable for applications needing high-speed operation up to 100 MHz and balanced output drive. Consider its 5.5 V input tolerance if interfacing with legacy 5-V logic while operating the core at lower voltages like 3.3 V.

Latches Part Context

This device belongs to the SNx4LVC573A family of octal transparent D-type latches. It shares functional characteristics with other variants in the series but differs in packaging options such as SSOP, SOIC, and VQFN. The LVC series is optimized for low-voltage CMOS applications requiring high drive strength and fast switching speeds.

Latches Replacement Considerations

SN74LVC573ADBR

Latches FAQ

How does the Ioff feature function?

The Ioff circuitry automatically disables the outputs when the device is powered down, preventing damaging current backflow through the inputs and outputs.

What is the behavior of the outputs when OE is high?

When the Output Enable (OE) pin is high, the outputs enter a high-impedance state, neither loading nor significantly driving the bus lines.