2U3838E18QDBVRG4Q1

Overview

The TPS3838E18QDBVRG4Q1 is a voltage supervisory circuit designed for automotive applications, featuring an active-low open-drain output. It operates within a supply voltage range up to 6 V and includes manual reset functionality without a watchdog timer or battery backup switch. The device monitors a single input with a threshold voltage of 1.71 V and an overvoltage threshold of 1.74 V. Reset delay time is selectable at 200 ms. It maintains accuracy of 1.75% and draws 250 nA in working power current. The component supports surface mount installation in an SOT-23-5 package and functions reliably between -40°C and +125°C.

Feature Summary

• Provides manual reset capability with active-low open-drain output signaling
• Features selectable reset delay times for flexible system timing control
• Includes manual reset button interface for user-initiated system recovery

Applications

• Automotive electronic systems requiring AEC-Q100 qualified supervision
• Microprocessor reset monitoring in vehicle control units
• Power supply validation in automotive infotainment modules

Procurement Notes

Verify the specific suffix G4 indicates lead-free and RoHS compliance status through official Texas Instruments documentation. Confirm the Q1 designation aligns with required automotive qualification standards for your application environment. Check current manufacturing status as this part number may be discontinued or subject to product change notices. Ensure the SOT-23-5 package dimensions match your PCB footprint requirements before finalizing procurement plans.

Selection Notes

Select this component when a low quiescent current supervisor is needed for automotive voltage monitoring. The 1.71 V threshold suits low-voltage rail supervision tasks. Consider the open-drain output compatibility with downstream logic levels. Verify that the absence of a watchdog timer meets your system safety requirements. Evaluate the thermal performance within the specified operating temperature range for your enclosure design.

Part Context

This part belongs to the TPS3838 family of NanoPower supervisory circuits from Texas Instruments. It is specifically engineered for automotive environments meeting AEC-Q100 standards. The series offers various threshold voltages and delay options within the same SOT-23-5 package form factor. This variant focuses on low-power operation suitable for battery-backed or always-on automotive circuits.

Replacement Considerations

TPS3838E18DBVR is listed as a similar non-automotive grade alternative.