FST3125DTR2G

Overview

The FST3125DTR2G is a 4-bit bus switch manufactured by onsemi, belonging to the 74FST logic family. It operates on a single power supply ranging from 4V to 5.5V and supports an operating temperature range of -40°C to 85°C. The device is housed in a 16-TSSOP package with a width of 4.40mm. It features Schmitt-trigger inputs for noise immunity and includes an active pull-up resistor on the control input to ensure a defined state during power transitions.

Feature Summary

• Provides four independent bidirectional data paths for signal routing between different voltage domains.
• Incorporates Schmitt-trigger inputs to filter noise and improve signal integrity on digital lines.
• Features an active pull-up resistor on the control pin to maintain a defined logic level during power-up sequences.

Applications

• Portable equipment requiring low-voltage signal switching
• Consumer electronics utilizing high-speed data buses
• Computing systems managing peripheral interface signals

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status and check for specific manufacturing date codes relevant to project timelines. Ensure the TSSOP-16 package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require bidirectional switching between 5V and lower voltage logic levels. The 74FST series offers faster switching speeds compared to standard TTL or CMOS alternatives. Ensure the system voltage remains within the specified 4V to 5.5V range for optimal performance.

Part Context

This part is part of the 74FST (Fast Switching Technology) family, designed for high-speed applications. It serves as a direct replacement for similar bus switches from other manufacturers like Fairchild Semiconductor or Integrated Device Technology, maintaining pin compatibility for legacy designs.

Replacement Considerations

Compatible substitutes include the 74FST3125 from other vendors and the FST3125MX. Verify pinout compatibility and electrical characteristics such as on-resistance and propagation delay before substituting in existing designs.