FST3125MTC

Overview

The FST3125MTC is a four-bit bus switch manufactured by Fairchild Semiconductor, housed in a TSSOP-16 package. It provides high-speed CMOS TTL-compatible switching with low on-resistance to minimize propagation delay and ground bounce noise. The device features separate output enable inputs for each switch pair. Control inputs are compatible with TTL levels, ensuring seamless integration with standard logic families.

Feature Summary

• Undershoot hardened I/O ports
• TTL-compatible control inputs
• Low power consumption design

Applications

• Portable equipment
• Consumer electronics
• Communications equipment

Procurement Notes

Verify the specific suffix 'MTC' corresponds to the TSSOP-16 package variant when sourcing. Confirm RoHS compliance status as manufacturing standards evolve. Ensure the supply chain source is authorized to guarantee component authenticity and traceability for critical applications.

Selection Notes

Select this component for designs requiring isolated bidirectional data transfer between different voltage domains. The separate OE pins allow independent control of each bit pair. Verify that the required switching speed and current drive capabilities align with the system's signal integrity requirements.

Part Context

This part belongs to the FST3125 family of bus switches. Variants such as FST3125M and FST3125QSC share identical electrical characteristics but differ in physical packaging. The MTC suffix specifically denotes the Thin Shrink Small Outline Package (TSSOP) form factor suitable for space-constrained PCB layouts.

Replacement Considerations

Direct pin-to-pin replacements include other FST3125 variants like FST3125MX or FST3125QSCX. Cross-manufacturer equivalents may exist but require verification of package dimensions and electrical parameters.