74LCX573BQX

Latches Overview

The Fairchild Semiconductor 74LCX573BQX is a discontinued octal D-type transparent latch housed in a 20-DQFN package. It operates within a supply voltage range of 2.0 V to 3.6 V and supports a maximum operating temperature of +85°C. The device features tri-state outputs and 5V tolerant inputs, with a typical propagation delay of 1.5 ns. It provides buffered common Latch Enable (LE) and Output Enable (OE) inputs for high-speed data storage applications.

Latches Feature Summary

• High-speed octal latch design with buffered control inputs
• 5V tolerant input capability for mixed-voltage system interfacing
• Tri-state output configuration for bus-driven applications

Latches Applications

• Data storage in low-voltage digital systems
• Bus interface circuits requiring level shifting
• Portable electronic devices operating at 3.3V logic levels

Latches Procurement Notes

This component is obsolete and no longer in production by Fairchild Semiconductor. Sourcing requires verification of availability from third-party distributors or surplus markets. Buyers must confirm the authenticity and condition of existing stock, as original manufacturing has ceased. Alternative components should be evaluated for pin-compatible replacements.

Latches Selection Notes

Select this part only if legacy compatibility with the 74LCX series is required. Verify that the 20-DQFN footprint matches the PCB layout constraints. Ensure the 2.0V to 3.6V operating range aligns with the target system power supply. Consider the 5V tolerance feature if interfacing with higher voltage logic signals without additional level shifters.

Latches Part Context

The 74LCX573 belongs to the LCX family of low-voltage CMOS logic devices, designed for high-speed operation with reduced power consumption. This specific model represents an octal latch variant, distinct from transceivers or flip-flops within the same logical family. The BQX suffix typically denotes the specific tape-and-reel packaging and environmental compliance status for the 20-DQFN form factor.

Latches Replacement Considerations

As the 74LCX573BQX is discontinued, verify equivalent parts from onsemi or other manufacturers offering the 74LCX573 in a 20-DQFN package. Ensure electrical parameters such as propagation delay and I/O voltage tolerances match the original design requirements.