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 via I 2C (1 ms to 864 ms)
- Start-up delay for SoC boot up initialization (2 ms to 3.46 s)
- Programmable maximum violation count (up to 7) before WDO assertion
- Watchdog disable pin (WDE)
- Monitor state-of-the art SOCs
- 3 channels with 3 remote sense ( TPS389C03-Q1)
- Input voltage range: 2.6 V to 5.5 V
- Undervoltage lockout (UVLO): 2.6 V
- High threshold accuracy:
- ± 5 mV (–40°C to +125°C)
- Built-in ADC for voltage readouts
- Fixed window threshold levels
- 5 mV steps from 0.2 V to 1.475 V
- 20 mV steps in other ranges
- Miniature solution and minimal component cost
- 3 mm x 3 mm QFN package
- User adjustable voltage threshold levels via I 2C
- User adjustable glitch immunity and hysteresis levels via I 2C
- Designed for safety applications
- Error Signal Monitoring (ESM)
- Programmable ESM delay via I 2C (1 ms to 864 ms)
- 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 3 mm x 3 mm 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. I 2C 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 1 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS389C03-Q1Multichannel Overvoltage and Undervoltage I2C Programmable Voltage Supervisor and Monitor with Q&A Watchdog datasheet (Rev. D) | PDF | HTML | 05 Oct 2023 |
Design & development
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Application software & framework
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| Package | Pins | Download |
|---|---|---|
| WQFN (RTE) | 16 | View options |
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