74FST3126DTR2

Overview

The onsemi 74FST3126DTR2 is a quad bus switch housed in a TSSOP-14 package. It operates between 4.0 V and 5.5 V, providing four independent 1-bit switches with separate Output/Enable (OE) pins. The device features an on-resistance of 4 ohms typical at 4.5 V and propagation delays under 0.25 ns. Control inputs are TTL/CMOS compatible, and the component exhibits nearly zero standby current.

Feature Summary

• Provides four independent 1-bit switches with separate OE pins for precise control
• Features extremely low on-resistance and negligible propagation delay
• Control inputs maintain compatibility with standard TTL and CMOS logic levels

Applications

• High-speed data bus switching applications
• Signal routing in digital communication systems
• Level translation interfaces requiring minimal signal distortion

Procurement Notes

Verify that the specific order number matches the required suffix for the TSSOP-14 tape and reel packaging configuration. Confirm compliance with RoHS standards as the device is inherently lead-free. Ensure the supply voltage range aligns with system requirements before finalizing procurement to avoid operational issues.

Selection Notes

Select this component when low insertion loss and high-speed switching are critical. The TSSOP-14 package offers a compact footprint suitable for space-constrained designs. Verify that the operating temperature range meets environmental specifications and that the input voltage levels match the source logic family.

Part Context

This part belongs to the 74FST logic series, designed for high-performance bus switching. It serves as a direct replacement for similar devices like the QS3126, FST3126, and CBT3126 due to pin-for-pin compatibility. The technology ensures minimal ground bounce and noise generation during operation.

Replacement Considerations

Direct substitutes include the QS3126, FST3126, and CBT3126, which offer pin-for-pin compatibility. Verify package dimensions and electrical characteristics against these alternatives to ensure seamless integration without circuit redesign.

FAQ

What is the maximum propagation delay through the switch?

The maximum propagation delay through the switch is less than 0.25 ns.

How does the device handle control inputs?

The control inputs are compatible with both TTL and CMOS logic levels.