TMUX582FPWTSEP

Overview

The TMUX582F-SEP is a radiation-tolerant, latch-up immune 8:1 multiplexer designed for harsh space environments. It features integrated overvoltage protection up to +60V and adjustable fault thresholds (VFP) from 3V to the supply voltage. The device operates on a single supply ranging from +8V to +22V with an operating temperature range of –55°C to +125°C. Key electrical parameters include a maximum on-resistance of 400 Ohms, a typical off-isolation of -75 dB, and a bandwidth of 130 MHz. It utilizes a TSSOP-20 package.

Feature Summary

• Radiation hardened against single event latch-up, ELDRS, and total ionizing dose effects.
• Integrated overvoltage protection up to +60V with adjustable fault threshold detection.
• Latch-up immune construction ensuring robust operation in high-radiation environments.
• Precision performance characterized by low source off-leakage current and minimal off-capacitance.

Applications

• Low earth orbit (LEO) space applications
• Remote interface unit (RIU)
• Satellite telemetry and telecommand for on-board data handling

Procurement Notes

Verify the specific ordering suffix SEP indicates the radiation-hardened qualification level required for your mission profile. Confirm that the TSSOP-20 package dimensions align with your PCB layout constraints. Ensure that the single-supply voltage requirements match your system's power distribution network capabilities before finalizing procurement.

Selection Notes

Select this component when radiation tolerance and high-voltage fault protection are critical. Verify that the 8:1 configuration meets your signal routing needs. Ensure the +8V to +22V supply range is compatible with your power architecture. Consider the thermal dissipation characteristics if operating at elevated ambient temperatures within the specified range.

Part Context

This part belongs to the TMUX582F-SEP family, which is specifically engineered for space-grade applications. It differs from standard commercial multiplexers by offering enhanced radiation hardness and robust overvoltage protection mechanisms suitable for satellite and aerospace systems.

Replacement Considerations

Direct replacements must offer equivalent radiation tolerance levels and +60V protection capabilities. Verify pin compatibility with the TSSOP-20 package. Ensure the substitute supports the same 8:1 configuration and single-supply voltage range.

FAQ

How does the device handle overvoltage faults?

When a source pin voltage exceeds the VFP or VFN threshold, the affected channel turns off and enters a high-impedance state. Non-fault channels continue to operate normally with low leakage currents.

What is the purpose of the FF and SF pins?

The FF (General Fault Flag) pin asserts low when any source pin detects an overvoltage condition. The SF (Specific Fault Flag) pin indicates which specific input pin is under fault based on the logic address inputs.

Is the device capable of cold sparing?

Yes, the integrated overvoltage protection allows the device to be cold sparing capable up to +60V, even when supplies are powered off or floating.