TPS389C03-Q1 Series

Automotive, 3-channel, overvoltage and undervoltage I²C programmable supervisor with Q&A watchdog

Catalog

Automotive, 3-channel, overvoltage and undervoltage I²C programmable supervisor with Q&A watchdog

Part	Reset	Operating Temperature [Min]	Operating Temperature [Max]	Output	Package / Case	Voltage - Threshold	Mounting Type	Qualification	Reset Timeout	Grade	Type	Supplier Device Package	Number of Voltages Monitored
Texas Instruments TPS389C0300CRTERQ1	Active Low	-40 °C	125 °C	Open Drain or Open Collector	16-WFQFN Exposed Pad	Adjustable/Selectable	Surface Mount Wettable Flank	AEC-Q100	200 ms	Automotive	Simple Reset/Power-On Reset	16-WQFN (3x3)	3

Catalog

Automotive, 3-channel, overvoltage and undervoltage I²C programmable supervisor with Q&A watchdog

Key Features

• ASIL-D functional safety-compliantDocumentation to aid ISO 26262 system designSystematic capability up to ASIL DHardware capability up to ASIL DAEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°CDevice HBM ESD classification level 2Device CDM ESD classification level C7BQ&A Watchdog to monitor SoC software operationProgrammable 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 assertionWatchdog disable pin (WDE)Monitor state-of-the art SOCsThree channels with three remote sense (TPS389C03-Q1)Input voltage range: 2.6V to 5.5VUndervoltage lockout (UVLO): 2.6VHigh threshold accuracy:± 5mV (–40°C to +125°C)Built-in ADC for voltage readoutsFixed window threshold levels5mV steps from 0.2V to 1.475V20mV steps in other rangesMiniature solution and minimal component cost3mm × 3mm QFN packageUser adjustable voltage threshold levels via I2CUser adjustable glitch immunity and hysteresis levels via I2CDesigned for safety applicationsError 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 outputsASIL-D functional safety-compliantDocumentation to aid ISO 26262 system designSystematic capability up to ASIL DHardware capability up to ASIL DAEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°CDevice HBM ESD classification level 2Device CDM ESD classification level C7BQ&A Watchdog to monitor SoC software operationProgrammable 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 assertionWatchdog disable pin (WDE)Monitor state-of-the art SOCsThree channels with three remote sense (TPS389C03-Q1)Input voltage range: 2.6V to 5.5VUndervoltage lockout (UVLO): 2.6VHigh threshold accuracy:± 5mV (–40°C to +125°C)Built-in ADC for voltage readoutsFixed window threshold levels5mV steps from 0.2V to 1.475V20mV steps in other rangesMiniature solution and minimal component cost3mm × 3mm QFN packageUser adjustable voltage threshold levels via I2CUser adjustable glitch immunity and hysteresis levels via I2CDesigned for safety applicationsError 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

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 low-voltage 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, solution 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. 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 low-voltage 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, solution 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.