SNJ54LVC573AFK

Overview

The SNJ54LVC573AFK is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates from a supply voltage of 2 V to 3.6 V and features inputs that accept voltages up to 5.5 V. The device provides a maximum propagation delay of 6.9 ns at 3.3 V and typical output ground bounce of 2 V. It includes Ioff support for partial power-down mode and back drive protection, along with ESD protection exceeding 2000 V via the human-body model. The component utilizes a 20-pin LCCC package.

Feature Summary

• Operates within a wide voltage range of 1.65 V to 3.6 V
• Inputs tolerate voltages up to 5.5 V for mixed-mode signal operation
• Ioff circuitry prevents damaging current backflow during partial power-down
• Outputs provide high drive capability for low-impedance loads

Applications

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

Procurement Notes

Verify the specific ordering suffix FK corresponds to the 20-pin LCCC ceramic package when sourcing. Confirm the military-grade temperature rating of -55°C to 125°C matches system requirements. Ensure compatibility with MIL-PRF-38535 standards if applicable. Check for RoHS compliance status as indicated in the orderable addendum. Validate pinout alignment with existing PCB layouts before procurement.

Selection Notes

Select this component for applications requiring octal data latching with high-speed performance. The 5.5 V tolerant inputs facilitate interface between 5 V logic and lower voltage systems. High drive currents support direct connection to buses without external buffers. Consider the LCCC package for hermetic sealing needs in harsh environments. Evaluate thermal management requirements based on the junction-to-ambient resistance specified for the package type.

Part Context

This part belongs to the SNx4LVC573A family of octal transparent D-type latches. It shares functional characteristics with commercial variants like the SN74LVC573A but offers extended temperature ranges suitable for military or industrial use. The LCCC package provides a robust, hermetically sealed option compared to standard plastic packages. It serves as a bridge between high-speed digital logic and memory interfaces.

Replacement Considerations

SNJ54LVC573AJ (CDIP package)

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.

What is the input voltage tolerance?

The inputs accept voltages up to 5.5 V, allowing for mixed-mode signal operation with 5-V input/output voltage while using a 3.3-V VCC.