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Product Detailed Parameters
- Description：IC SWITCH SP8T X 1 250OHM 20QFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Switch Circuit：SP8T
- Multiplexer/Demultiplexer Circuit：8:01
- On-State Resistance (Max)：250Ohm
- Channel-to-Channel Matching (ΔRon)：2.5Ohm
- Voltage - Supply, Single (V+)：8V ~ 44V
- Voltage - Supply, Dual (V±)：±5V ~ 22V
- Switch Time (Ton, Toff) (Max)：300ns, 400ns
- -3db Bandwidth：150MHz
- Charge Injection：-17pC
- Channel Capacitance (CS(off), CD(off))：3.5pF, 28pF
- Current - Leakage (IS(off)) (Max)：1nA
- Crosstalk：-95dB @ 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：1
- Grade：-
- Qualification：-
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Overview
The TMUX7348FRTJR is a single-ended 8:1 analog multiplexer in a 20-pin WQFN package. It supports dual supplies from ±5 V to ±22 V and single supplies from 8 V to 44 V. The device provides integrated fault protection with overvoltage tolerance up to ±85 V relative to supplies or ±60 V relative to ground. It features adjustable fault thresholds via VFP and VFN pins, latch-up immunity, and 1.8-V logic compatibility. Electrical characteristics include an on-resistance of 250 Ω maximum at 25°C, off-isolation of -82 dB typical, and a bandwidth of 150 MHz.
Feature Summary
- Integrated fault protection with adjustable triggering thresholds for overvoltage conditions
- Latch-up immunity by device construction for robust operation
- Fail-safe logic capable of handling voltages up to 44 V independent of supply
- Break-before-make switching to prevent signal shorting
Applications
- Factory automation and control
- Programmable logic controllers (PLC)
- Analog input modules
- Semiconductor test equipment
- Data acquisition systems (DAQ)
Procurement Notes
Verify the RTJ suffix corresponds to the 20-pin WQFN package configuration. Confirm that the specific revision level matches the design requirements. Ensure the component meets RoHS compliance standards if required by the application. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin functions before finalizing procurement.
Selection Notes
Select this component for applications requiring high voltage fault tolerance and adjustable protection thresholds. The WQFN package is suitable for designs with limited PCB space. Ensure the supply voltage differential remains within the 8 V to 44 V range. Verify that the logic levels are compatible with the 1.8-V requirement for control inputs.
Part Context
This part belongs to the TMUX734xF family, which includes the TMUX7349F dual 4:1 multiplexer variant. Both devices share similar fault protection and logic features but differ in channel configuration. The RTJ suffix specifically denotes the smaller WQFN package option compared to the standard TSSOP PW package.
Replacement Considerations
The TMUX7348FPW is a direct replacement offering the same 8:1 configuration in a TSSOP-20 package. Consider the TMUX7349F for dual 4:1 differential applications. Verify package dimensions and thermal performance when substituting between WQFN and TSSOP formats.
