Calculation tool
TPS389C03-WD — TPS389C03 watchdog question and answer table
Q&A Watchdog Answer Table
TPS389C03-Q1
Automotive, 3-channel, overvoltage and undervoltage I²C programmable supervisor with Q&A watchdog
Data sheet
TPS389C03-Q1
- ASIL-D functional safety-compliant
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
- 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
- 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 solution 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
- Error Signal Monitoring (ESM)
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.
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Technical documentation
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View all 2 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS389C03-Q1 Multichannel Overvoltage and Undervoltage I2 C Programmable Voltage Supervisor and Monitor with Q&A Watchdog datasheet (Rev. F) | PDF | HTML | 31 Jul 2024 |
| Application brief | Discrete Power Design for C2000™ | PDF | HTML | 15 Aug 2024 |
Design & development
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
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