74FST3125DTR2

Overview

The onsemi 74FST3125DTR2 is a quad bus switch in a TSSOP-14 package. It operates between 4.0 V and 5.5 V with TTL/CMOS compatible inputs. The device features four independent 1-bit switches with separate OE pins, providing nearly zero propagation delay (max 0.25 ns) and low on-resistance (typical 4 Ω). It exhibits negligible standby current and prevents circuit bounce.

Feature Summary

• Four independent 1-bit switches with separate Output/Enable control pins
• Extremely low on-resistance for minimal signal attenuation
• Nearly zero propagation delay through the switch path
• TTL and CMOS compatible control inputs

Applications

• High-speed data bus switching applications
• Portable battery-powered systems requiring low power consumption
• Consumer electronics utilizing high-performance bus architectures

Procurement Notes

Verify the specific ordering suffix to confirm the package type and shipping quantity. The 'DT' suffix indicates the TSSOP-14 package, while 'R2' denotes tape and reel packaging. Confirm RoHS compliance status and ensure the component matches the required operating temperature range of -40°C to +85°C before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require fast, low-distortion signal routing between different voltage domains or buses. The device is suitable for applications demanding minimal insertion loss and high bandwidth. Ensure the supply voltage remains within the 4.0 V to 5.5 V range to maintain specified electrical characteristics and input compatibility.

Part Context

This part belongs to the FST logic family, designed for high-speed performance. It serves as a direct replacement for similar bus switches like the QS3125, FST3125, and CBT3125 due to pin-for-pin compatibility. The technology leverages advanced CMOS processes to achieve superior speed and lower power consumption compared to standard logic families.

Replacement Considerations

The datasheet confirms pin-for-pin compatibility with the QS3125, FST3125, and CBT3125 devices. These parts can be substituted directly without modifying the PCB layout or circuit design, provided their electrical specifications meet the system requirements.