SN74LVC573APW

Latches Overview

The SN74LVC573APW is an octal transparent D-type latch with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features inputs that accept voltages up to 5.5 V, supporting mixed-mode signal operation. The device includes Ioff circuitry for partial power-down mode and back drive protection. It offers high drive capability suitable for driving highly capacitive or low-impedance loads. The PW package provides a 20-pin Thin Shrink Small Outline Package (TSSOP) form factor.

Latches Feature Summary

• Octal transparent D-type latch architecture with independent data inputs and latched outputs
• 3-state outputs capable of driving high capacitive loads without interface components
• Ioff feature enables live insertion and prevents damaging current backflow during partial power-down
• 5.5-V tolerant inputs allow direct interfacing with 5-V systems while operating at lower supply voltages

Latches Applications

• Servers
• PC and notebook computer bus interfaces
• Network switch buffer registers
• Health and fitness wearable devices

Latches Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature range. Confirm RoHS compliance status and lead finish details against the latest TI Package Information Addendum. Ensure the part number corresponds to the active production status rather than preproduction or obsolete variants. Cross-reference the manufacturer's official documentation for any recent revisions to electrical characteristics or thermal metrics.

Latches Selection Notes

Select this component when an octal latch with 3-state output control is required for bus interface applications. It is suitable for designs needing voltage translation from 5-V logic to lower voltage domains. Consider the TSSOP package constraints for PCB layout. Verify that the input transition rates and load conditions align with the specified timing requirements for the target operating frequency.

Latches Part Context

This device belongs to the SNx4LVC573A family of octal transparent D-type latches. It shares functional similarities with the SN54LVC573A but differs in the minimum operating supply voltage range. The family is characterized by CMOS technology providing balanced output drive and low static power consumption. It is distinct from flip-flops as it is level-sensitive rather than edge-triggered.

Latches Replacement Considerations

SN74LVC573ADBR

Latches FAQ

How does the Ioff feature function?

The Ioff circuitry disables the outputs when the device is powered down, preventing damaging current backflow through the device when VCC is 0 V.

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 driving the bus lines significantly.