MM74C373WMX

Latches Overview

The MM74C373WMX is an octal D-type transparent latch manufactured by Fairchild Semiconductor, operating within the 74C CMOS logic family. It features eight independent latches with tri-state outputs, housed in a 20-pin SOIC package. The device supports a supply voltage range of 3V to 15V and operates across an extended temperature range of -55°C to 125°C. It provides true output polarity and handles output currents of 24mA for both high and low states.

Latches Feature Summary

• Octal D-type transparent latch architecture for storing 8-bit data
• Tri-state outputs enabling bus-oriented memory applications
• Extended industrial temperature rating from -55°C to 125°C
• CMOS technology compatible with wide supply voltage ranges

Latches Applications

• Bus-oriented memory systems requiring 8-bit storage
• Register applications in digital logic circuits
• Portable equipment utilizing wide voltage operation
• Industrial control systems needing extended temperature stability

Latches Procurement Notes

Verify the manufacturer designation as Fairchild Semiconductor or its successor onsemi, as corporate ownership has changed. Confirm the suffix 'MX' indicates surface mount packaging in the 20-SOIC form factor. Ensure compliance requirements match the specific revision, noting that some sources indicate non-Rohs status for older batches while others list RoHS compliance. Validate the supply voltage and temperature specifications against the official datasheet for the specific lot.

Latches Selection Notes

Select this component when an octal latch with tri-state capability is required for bus-driven designs. The 74C series offers compatibility with standard TTL logic levels while providing CMOS power efficiency. Consider the wide supply voltage range if the system operates between 3V and 15V. The extended temperature range makes it suitable for harsh environments where standard commercial grade parts would fail. Ensure the 20-SOIC package fits the PCB layout constraints.

Latches Part Context

This part belongs to the 74C series of CMOS logic devices, which are designed for general-purpose digital applications. It is functionally similar to other octal latches like the 74LS373 but utilizes CMOS technology for lower power consumption. The MM74C373WMX variant specifically denotes the surface mount version of the standard through-hole MM74C373M. It serves as a fundamental building block for data storage in microprocessor-based systems.

Latches Replacement Considerations

Direct substitutes include the MM74C373M (through-hole) and equivalent parts from other manufacturers such as NXP or Texas Instruments within the 74C series. Verify pinout compatibility and electrical characteristics before substitution. Note that 74HC or 74HCT variants may have different voltage thresholds and should be evaluated carefully for direct replacement.