TMUX1308AQPWRQ1

Overview

The TMUX1308AQPWRQ1 is an automotive-grade, single-channel, 8:1 CMOS multiplexer from Texas Instruments. It operates on a single supply voltage ranging from 1.62V to 5.5V and supports bidirectional analog and digital signals across its source and drain pins. The device features internal injection current control, eliminating the need for external protection networks. It is housed in a 16-pin TSSOP package (PW suffix) with dimensions of 5mm by 4.4mm. Key electrical parameters include a maximum on-resistance of 195 Ohms at 5V, a propagation delay of 4ns at 5V with 15pF load, and a bandwidth of 500MHz. It is qualified under AEC-Q100 standards for Grade 1, supporting an ambient operating temperature range from -40°C to +125°C.

Feature Summary

• Internal injection current control circuitry prevents signal path interference when voltages exceed the supply rail.
• Fail-safe logic allows control pin voltages to be applied prior to power supply activation without damage.
• Break-before-make switching mechanism ensures no overlap between active channels during state transitions.
• Absence of internal ESD diode paths to VDD eliminates risks of unintended power delivery or component damage.

Applications

• Analog and digital multiplexing and demultiplexing
• Automotive body control modules
• Battery management systems (BMS)
• Zonal architecture signal routing

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the 16-pin TSSOP package configuration required for your PCB layout. Confirm that the 'Q1' designation aligns with your project's requirement for AEC-Q100 automotive qualification. Ensure the input logic levels match the 1.8V compatible thresholds specified in the datasheet for reliable operation within the 1.62V to 5.5V supply range.

Selection Notes

Select this component when a single-ended 8:1 multiplexing function is required in space-constrained automotive designs. The TSSOP-16 package offers a balance between thermal performance and footprint size compared to larger alternatives. Consider the 195 Ohm on-resistance limit for high-impedance load applications where signal integrity is critical. Verify that the 500MHz bandwidth meets the frequency requirements of the signals being routed.

Part Context

This part belongs to the TMUX13xxA-Q1 family of general-purpose CMOS multiplexers designed for high-impedance loads. While the TMUX1309A-Q1 variant provides two differential 4:1 channels, the TMUX1308A-Q1 focuses on a single 8:1 channel configuration. Both share identical pinouts and core features, allowing for flexible design upgrades or downgrades within the same package form factor.

Replacement Considerations

Pin-compatible replacements include industry standard 4051, 4851, and non-automotive TMUX1308 devices. Verify that substitute parts meet the specific AEC-Q100 Grade 1 temperature and reliability requirements if used in certified automotive systems.