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Product Detailed Parameters
- Description：60V, FAULT-PROTECTED, DUAL 4:1 M
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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+)：5V ~ 44V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：300ns, 400ns
- -3db Bandwidth：245MHz
- Charge Injection：-17pC
- Channel Capacitance (CS(off), CD(off))：3.5pF, 14pF
- Current - Leakage (IS(off)) (Max)：1nA
- Crosstalk：-103dB @ 1MHz
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The TMUX7349FPWR is a dual 4:1 analog multiplexer from Texas Instruments featuring ±60-V fault protection and latch-up immunity. It operates with dual supplies ranging from ±5 V to ±22 V, single supplies from 8 V to 44 V, or asymmetric configurations. The device includes adjustable overvoltage triggering thresholds via VFP and VFN pins, providing interrupt flags (FF and SF) for fault detection. It supports 1.8-V logic inputs and fail-safe logic up to 44 V independent of the supply voltage. Packaged in a 20-pin TSSOP (PW), it offers break-before-make switching and low charge injection suitable for precision data acquisition.
Feature Summary
- Integrated fault protection with adjustable overvoltage thresholds and active-low interrupt flags
- Latch-up immune construction ensuring robust operation under harsh conditions
- Supports 1.8-V logic levels with fail-safe capability up to 44 V independent of power supply
- Break-before-make switching mechanism minimizes signal glitches during channel transitions
Applications
- Factory automation and control systems
- Programmable logic controllers (PLC)
- Semi-conductor test equipment
- Battery test equipment
- Data acquisition systems (DAQ)
Procurement Notes
Verify the package suffix 'PWR' corresponds to the TSSOP-20 variant on a reel. Confirm that the specific revision level matches the design requirements. Ensure the ordering information aligns with the manufacturer's current production status. Cross-reference the datasheet revision history for any functional updates. Validate component authenticity through authorized distribution channels.
Selection Notes
Select this model when a dual-channel 4:1 configuration is required rather than the single-channel 8:1 alternative. Consider the TSSOP-20 package if PCB space allows compared to the smaller WQFN option. Verify that the ±60-V fault tolerance meets the system's maximum input voltage requirements. Ensure compatibility with 1.8-V logic control signals and appropriate pull-up resistor availability for the open-drain fault flags.
Part Context
This component belongs to the TMUX734xF family, which also includes the TMUX7348F single-ended 8:1 multiplexer. Both devices share identical fault protection specifications, latch-up immunity, and logic interface characteristics. The primary distinction lies in the internal switch topology, with the TMUX7349F providing two independent differential paths instead of one single-ended path.
Replacement Considerations
The TMUX7348FPWR serves as a functional substitute within the same family but provides an 8:1 single-ended configuration instead of dual 4:1. No other direct cross-model replacements are documented in the provided source material.
