TMUX1309AQPWRQ1

Overview

The TMUX1309AQPWRQ1 is an automotive-grade, bidirectional CMOS multiplexer featuring a 4:1 configuration with two differential channels. It operates on a single supply voltage ranging from 1.62 V to 5.5 V and supports rail-to-rail signal paths. The device incorporates internal injection current control to protect switches without external components. Key electrical parameters include a maximum on-resistance of 195 Ohms at 5 V, a typical off-isolation of -110 dB at 100 kHz, and a bandwidth up to 500 MHz. It utilizes a 16-pin TSSOP package and meets AEC-Q100 Grade 1 standards for operation between -40°C and +125°C.

Feature Summary

• Internal injection current control eliminates the need for external protection diodes or resistor networks.
• Fail-safe logic allows control voltages to be applied before the power supply is connected.
• Bidirectional signal paths support analog and digital signals from ground to the positive supply rail.
• Pin-compatible with industry-standard 4052, 4852, and 1309 multiplexers.

Applications

• Automotive body control modules
• Battery management systems (BMS)
• HVAC control modules
• Telematics and onboard charging systems

Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific revision level against the manufacturer's latest documentation to ensure compatibility with functional safety requirements. Check RoHS compliance status as indicated in the official datasheet specifications.

Selection Notes

Select this component when designing for high-impedance loads requiring bidirectional switching within a 5V automotive environment. Ensure the application benefits from the integrated injection current control to minimize external circuit complexity. Verify that the 1.8V logic thresholds align with the system's microcontroller output levels.

Part Context

This part belongs to the TMUX13xxA-Q1 family of general-purpose CMOS multiplexers designed specifically for automotive applications. It serves as a differential channel variant alongside the single-ended TMUX1308A-Q1. The series is characterized by its robust protection features and direct replacement capability for legacy standard logic families.

Replacement Considerations

Direct pin-compatible replacements include the TMUX1309DYYR and TMUX1309BQBR. Non-automotive equivalents such as the TMUX1209PWR offer lower on-resistance but lack AEC-Q100 qualification and injection current control.

FAQ

How does the device handle input signals exceeding the supply voltage?

The internal injection current control circuitry allows signals on disabled or enabled paths to exceed the supply voltage without affecting the active signal path or damaging the device.

What is the purpose of the fail-safe logic feature?

Fail-safe logic protects the device from potential damage by allowing voltages on the control pins to be applied before the voltage is applied to the power supply pin.

Is there an internal ESD diode path to the supply pin?

No, the device does not have an internal diode path to the VDD pin, which prevents unintended power delivery to the supply rail or damage to connected components.