TMUX7348FPWR

Overview

The TMUX7348FPWR is a single-channel, 8:1 analog multiplexer from Texas Instruments featuring integrated fault protection and latch-up immunity. It operates with dual supplies ranging from ±5 V to ±22 V or a single supply from 8 V to 44 V. The device provides overvoltage protection up to ±60 V relative to ground and ±85 V relative to the power rails in both powered and powered-off states. Key electrical parameters include a maximum on-resistance of 250 Ohms at 25°C, a typical off-isolation of -82 dB at 1 MHz, and a -3 dB bandwidth of 150 MHz. It supports 1.8-V logic inputs and includes adjustable fault thresholds via dedicated VFP and VFN pins.

Feature Summary

• Integrated fault protection circuitry that detects overvoltage conditions on source pins and clamps the drain pin to the fault supply voltage while maintaining low leakage currents on non-fault channels.
• Latch-up immunity provided by device construction, ensuring robust operation in harsh environments without risk of parasitic current events.
• Fail-safe logic capability allowing control signals up to 44 V independent of the main power supply, supporting flexible system sequencing.

Applications

• Factory automation and control systems
• Programmable logic controllers (PLC)
• Analog input modules
• Semiconductor test equipment
• Battery test equipment

Procurement Notes

Verify the specific package suffix 'PWR' corresponds to the TSSOP-20 form factor with reel packaging as indicated in official documentation. Confirm RoHS compliance status through the manufacturer's current datasheet revision. Ensure the ordering part number matches the exact functional configuration required for the design.

Selection Notes

Select this component when an 8:1 multiplexing configuration with high-voltage fault tolerance is required. It is suitable for applications where power supply sequencing cannot be strictly controlled due to its power-off protection capabilities. Consider the TSSOP-20 package if PCB space allows, noting the thermal characteristics associated with this footprint.

Part Context

This device belongs to the TMUX734xF family, which also includes the TMUX7349F dual 4:1 multiplexer. Both variants share similar fault protection features and logic compatibility but differ in channel count and configuration. The TMUX7348F specifically addresses single-ended signal routing needs within industrial data acquisition contexts.

Replacement Considerations

The TMUX7349F is a related variant offering a dual 4:1 configuration instead of 8:1. No other direct cross-model replacements are confirmed in the provided documentation.