1 Features

• AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C7B

• Functional Safety-Capable

– Documentation to aid ISO 26262 system design

– Systematic capability up to ASIL D

– Hardware capability up to ASIL D

• Q&A Watchdog to monitor SoC software operation

– Programmable OPEN/CLOSE watchdog timing

through I2C (1ms to 864ms)

– Start-up delay for SoC boot up initialization

(2ms to 3.46s)

– Programmable maximum violation count (up to

7) before WDO assertion

– Watchdog disable pin (WDE)

• Monitor state-of-the art SOCs

– Three channels with three remote sense

(TPS389C03-Q1)

– Input voltage range: 2.6V to 5.5V

– Undervoltage lockout (UVLO): 2.6V

– High threshold accuracy:

– ± 5mV (–40°C to +125°C)

– Built-in ADC for voltage readouts

– Fixed window threshold levels

• 5mV steps from 0.2V to 1.475V

• 20mV steps in other ranges

• Miniature package and minimal component cost

– 3mm × 3mm QFN package

– User adjustable voltage threshold levels via I2C

– User adjustable glitch immunity and hysteresis

levels via I2C

• Designed for safety applications

– Error Signal Monitoring (ESM)

• Programmable ESM delay via I2C (1ms to

864ms)

– Cyclic Redundancy Checking (CRC)

– Packet Error Checking (PEC)

– Active-low open-drain NIRQ, NRST, and WDO

outputs

2 Applications

• Advanced driver assistance system (ADAS)

• Sensor fusion

– Level 3 to Level 5 Autonomous Platforms

3 Description

The TPS389C03-Q1 device is an integrated

multichannel window monitor reset IC with three

remote sense pins available in a 16-pin 3mm × 3mm

QFN package.

This highly accurate multichannel voltage supervisor

is designed for systems that operate on lowvoltage

supply rails and have narrow margin supply

tolerances. Internal glitch immunity and noise filters

further eliminate false resets resulting from erroneous

signals. This TPS389C03-Q1 device does not require

any external resistors for setting overvoltage and

undervoltage reset thresholds, which further optimizes

overall accuracy, cost, size, and improves reliability

for safety systems. I2C functionality gives flexibility

in selecting thresholds, reset delays, glitch filters,

and pin functionality. This device offers CRC error

checking and a built-in ADC for voltage readouts to

provide redundant error checking. The device has a

built in Q&A watchdog and Error Signal monitor with

independent watchdog enable and watchdog output.