FSTD3125MTCX

Overview

The FSTD3125MTCX is a 4-bit bus switch manufactured by Fairchild Semiconductor, housed in an SSOP-16 package. It provides four high-speed CMOS TTL-compatible bus switches with separate output enable inputs. The device features low on-resistance for minimal propagation delay and zero bounce in flow-through mode. Control inputs are compatible with TTL levels. The operating temperature range extends from -40°C to +85°C.

Feature Summary

• Provides four independent one-bit switches connecting Port A to Port B when enabled
• Features low on-resistance to minimize propagation delay and ground bounce noise
• Includes integrated undershoot protection circuitry to support extended voltage ranges below ground
• Operates with TTL-compatible control inputs for straightforward logic interfacing

Applications

• High-speed data bus switching applications requiring low latency
• Systems utilizing mixed voltage domains requiring level shifting capabilities
• Portable electronic devices where low power consumption is critical
• Industrial control systems operating within the specified temperature range

Procurement Notes

Verify the specific suffix 'MTCX' against official Fairchild or ON Semiconductor documentation to confirm the tape-and-reel packaging format and exact pinout configuration. Ensure the component meets RoHS compliance standards as indicated for this product family. Cross-reference the manufacturer's current datasheet revision to validate electrical characteristics and ordering information before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits that require bidirectional data transfer between ports with minimal signal distortion. The integrated level-shifting capability makes it suitable for interfaces involving different voltage logic families. Consider the SSOP-16 package constraints regarding PCB space and thermal dissipation requirements during the layout phase.

Part Context

This part belongs to the FST3125 series of digital bus switches derived from Fairchild’s proven switch technology. It shares functional similarities with other members like the FST3125QSC but includes specific enhancements such as undershoot protection. The MTCX designation indicates a specific mass-production variant within the broader FSTD3125 family offered by Fairchild and its successor entities.

Replacement Considerations

Publicly confirmed substitute part numbers for the FSTD3125MTCX were not identified in the provided source material. Verify compatibility with direct equivalents such as the FSTD3125MTC or FSTD3125MX only after consulting the latest manufacturer cross-reference guides.