TMUX2889YBHR

Overview

The TMUX2889YBHR is a CMOS multiplexer featuring two independently selectable 2:1 single-pole double-throw (SPDT) switch channels. It operates on a single supply voltage ranging from 1.8V to 5.5V and supports bidirectional analog and digital signals beyond the supply range, specifically from -5.5V to +5.5V. The device provides powered-off protection up to ±5.5V, ensuring isolation when VDD is 0V. Key electrical specifications include an ultra-low on-resistance of 0.2Ω maximum, low on-resistance flatness of 1mΩ, and a bandwidth of 72MHz. It incorporates over-temperature protection with a shutdown threshold at 160°C and hysteresis of 20°C.

Feature Summary

• Beyond-the-supply signal support enabling bidirectional AC and DC signal passage from -5.5V to +5.5V using a unidirectional supply.
• Powered-off protection isolates the switch path even when no supply voltage is present, preventing back-powering through internal ESD diodes.
• Integrated over-temperature protection that opens the switch upon reaching thermal limits to prevent damage or instability.
• Break-before-make switching logic prevents simultaneous connection of inputs during state transitions.

Applications

• Land mobile radios
• Defense radios
• Ultrasonic gas flow transmitters
• Smart drug delivery systems
• Analog input modules

Procurement Notes

Verify the specific ordering suffix YBH corresponds to the DSBGA-9 package configuration required for your design. Confirm that the component meets RoHS compliance standards applicable to your region before finalizing procurement. Ensure all technical parameters align with your system requirements prior to purchase.

Selection Notes

Select this component for applications requiring precision analog signal routing with minimal distortion. The low THD+N and high off-isolation make it suitable for audio and sensitive measurement circuits. Verify that the continuous current capabilities meet load requirements within the specified temperature range.

Part Context

This part belongs to the Texas Instruments TMUX2889 series of multiplexer switches. It is designed as a complementary metal-oxide semiconductor (CMOS) device offering high performance in a compact form factor. The series focuses on providing robust signal integrity and protection features for demanding electronic environments.

Replacement Considerations

Consult the official datasheet orderable addendum for available alternative packages within the same family. No direct cross-model substitutes are confirmed in the provided documentation. Verify pin compatibility and electrical specifications if considering devices from other manufacturers.

FAQ

How does the device handle signals outside the supply voltage range?

The TMUX2889 supports signals from -5.5V to +5.5V regardless of the VDD level, allowing bidirectional AC and DC signals to pass without distortion.

What happens if the device overheats?

The device includes over-temperature protection that activates at 160°C, opening the switch to stop self-heating and prevent damage.

Does the switch provide isolation when powered off?

Yes, the device offers powered-off protection up to ±5.5V, isolating the switch path when VDD is 0V to prevent back-powering.