MC74LCX373DT

Latches Overview

The MC74LCX373DT is a low-voltage CMOS octal transparent latch with 5 V-tolerant inputs and outputs, manufactured by onsemi. It operates from a 2.3 to 3.6 V supply and features high impedance TTL compatible inputs that significantly reduce current loading. The device contains eight D-type latches with 3-state outputs controlled by Latch Enable (LE) and Output Enable (OE). It supports live insertion and withdrawal, offers balanced 24 mA output sink and source capability, and ensures near zero static supply current across all logic states.

Latches Feature Summary

• Features 5 V tolerant inputs and outputs for safe interfacing with 5 V devices
• Provides balanced 24 mA output drive capability for improved switching noise performance
• Supports live insertion and withdrawal operations without system interference
• Guarantees high impedance state when VCC is 0 V via IOFF specification

Latches Applications

• Bus organized system applications requiring data storage and transfer
• Interfaces between 5 V TTL logic and low-voltage CMOS circuits
• Systems requiring live insertion and withdrawal capabilities
• Low power digital designs utilizing near zero static supply current

Latches Procurement Notes

Verify the specific package suffix matches the required form factor, as the DT suffix denotes TSSOP-20 packaging. Confirm RoHS compliance and lead-free status if environmental regulations apply to your assembly process. Ensure the ordering quantity aligns with the standard shipping unit of 75 units per rail for this specific variant. Cross-reference the full part number including any automotive or qualification suffixes if unique site requirements are necessary.

Latches Selection Notes

Select this component when interfacing 5 V logic signals with 2.3 V to 3.6 V low-voltage systems. The 5 V tolerance eliminates the need for level shifters in mixed-voltage environments. Choose this latch for applications demanding high input impedance to minimize driver loading. The balanced output drive strength makes it suitable for driving moderate capacitive loads directly.

Latches Part Context

This device belongs to the LCX series of low-voltage CMOS logic components designed for high-speed operation with low power consumption. It serves as an octal version of single-bit transparent latches, providing eight independent storage elements in a single package. The LCX family bridges the gap between older LVCMOS standards and modern low-voltage requirements while maintaining backward compatibility with higher voltage interfaces.

Latches Replacement Considerations

Direct substitutes include other octal transparent latches with 3-state outputs and 5 V tolerance. Verify pinout compatibility and electrical characteristics such as propagation delay and output drive strength before substitution. Consider alternative packages like SOIC-20 if TSSOP-20 availability is constrained, ensuring mechanical fit remains consistent.