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TMUX1308QPWRQ1

TITMUX1308QPWRQ1

Texas Instruments
1 Circuit IC Switch 8:1 195Ohm 16-TSSOP
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Overview

The TMUX1308QPWRQ1 is an automotive-grade, 8:1 multiplexer designed for high-reliability signal switching between 1.62V and 5.5V. This functional safety-capable IC features internal injection current control to prevent crosstalk and signal distortion in harsh electrical environments without requiring external diode clamps. Its bidirectional architecture supports rail-to-rail analog and digital signals, making it a versatile front-end component for sensor acquisition.

Why Choose This Part

The device eliminates the need for external ESD protection diodes on inputs through its unique injection current control, which prevents back-powering to VDD during overvoltage events. It offers a high 500MHz bandwidth and low charge injection of -6.5pC, ensuring minimal signal degradation in high-speed or precision applications. Additionally, 1.8V logic compatibility allows it to interface directly with modern low-voltage microcontrollers without level shifters.

Applications

Automotive ECU Sensor Polling
Switching multiple analog sensor inputs into a single ADC channel in powertrain or body control modules.
Functional Safety Systems
Used in ASIL-rated designs requiring documented failure modes and high reliability under thermal stress.
Industrial Data Acquisition
Interfacing multiple 5V or 3.3V logic signals or analog transducers to a central processor.
Battery Management Systems
Monitoring individual cell voltages or temperature sensors across a high-voltage battery stack.

Key Specifications

Crosstalk -90dB @ 1MHz
Mounting Type Surface Mount
-3db Bandwidth 500MHz
Package / Case 16-TSSOP (0.173", 4.40mm Width)
Charge Injection -6.5pC
Number of Circuits 1
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 16-TSSOP
On-State Resistance (Max) 195Ohm
Switch Time (Ton, Toff) (Max) 32ns, 40ns
Voltage - Supply, Single (V+) 1.62V ~ 5.5V
Current - Leakage (IS(off)) (Max) 1nA (Typ)
Multiplexer/Demultiplexer Circuit 8:1
Channel Capacitance (CS(off), CD(off)) 2pF, 7pF
Channel-to-Channel Matching (ΔRon) 7Ohm

Getting Started

Evaluation can be performed using the TMUX1308EVM, which provides header access to all channels and control pins. Ensure the decoupling capacitor is placed close to the VDD pin (Pin 16) to minimize switching noise. For safety-critical designs, consult the TI Functional Safety Information documentation for FIT rates and failure mode distribution.