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Product Detailed Parameters
- Description：IC SW SP4TX2 250OHM 20QFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Switch Circuit：SP4T - Open
- Multiplexer/Demultiplexer Circuit：4:01
- On-State Resistance (Max)：250Ohm
- Channel-to-Channel Matching (ΔRon)：2.5Ohm (Typ)
- Voltage - Supply, Single (V+)：8V ~ 44V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：390ns, 450ns
- -3db Bandwidth：255MHz
- Charge Injection：-16pC
- Channel Capacitance (CS(off), CD(off))：4pF, 16pF
- Current - Leakage (IS(off)) (Max)：1nA
- Crosstalk：-103dB @ 1MHz
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The TMUX7349FRTJR is a dual 4:1 analog multiplexer from Texas Instruments featuring integrated fault protection. It supports dual supplies of ±5 V to ±22 V or single supplies of 8 V to 44 V. The device provides overvoltage protection up to ±60 V relative to ground and ±85 V relative to supply rails in both powered and powered-off states. It utilizes a 20-pin WQFN (RTJ) package measuring 4 mm × 4 mm. Key electrical characteristics include a typical on-resistance of 250 Ω at ±15 V, break-before-make switching, and latch-up immunity. Logic inputs are compatible with 1.8-V signals.
Feature Summary
- Integrated fault protection with adjustable triggering thresholds for overvoltage conditions
- Dual 4:1 multiplexing configuration with differential drain terminals
- Latch-up immunity by device construction
- Active-low interrupt flags indicating general and specific fault channel information
Applications
- Factory automation and control systems
- Programmable logic controllers (PLC)
- Analog input modules
- Semiconductor test equipment
- Data acquisition systems (DAQ)
Procurement Notes
Verify the RTJ suffix confirms the 20-pin WQFN package variant. Confirm the 'F' designation indicates the fault-protected version. Ensure the ordering code matches the specific reel quantity requirements. Validate that the component status is active for long-term production use.
Selection Notes
Select this model for applications requiring differential signal routing with robust fault tolerance. The WQFN package is suitable where PCB space is limited compared to TSSOP options. Ensure the application voltage does not exceed the ±60 V ground-referenced limit. Verify logic compatibility with 1.8-V control signals if used in low-voltage environments.
Part Context
This component belongs to the TMUX734xF family, which includes the TMUX7348F (single-ended 8:1). Both variants share identical fault protection capabilities and power supply ranges. The TMUX7349F specifically handles two independent 4:1 channels, making it distinct from the single-channel architecture of the TMUX7348F.
Replacement Considerations
The TMUX7348F serves as a functional alternative for single-ended 8:1 applications within the same family. Other Texas Instruments multiplexers may offer similar fault protection but require verification of pinout compatibility and package dimensions.
