Product details

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) 1.67, 1.73, 2.32, 2.4, 2.79, 2.88, 3.07, 3.17, 4.65, 4.8 Features Manual reset capable, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 0.8 Output driver type/reset output Active-low, Open-drain Time delay (ms) 200 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) Programmable Operating temperature range (C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) 1.67, 1.73, 2.32, 2.4, 2.79, 2.88, 3.07, 3.17, 4.65, 4.8 Features Manual reset capable, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 0.8 Output driver type/reset output Active-low, Open-drain Time delay (ms) 200 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) Programmable Operating temperature range (C) -40 to 125
VSON (DRB) 8 9 mm² 3 x 3
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • Factory programmed precision watchdog and reset timers:
  • Manual reset input (MR)
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8 V to 5.0 V
    • 4% and 7% undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 8-Pin VSON package
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • Factory programmed precision watchdog and reset timers:
  • Manual reset input (MR)
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8 V to 5.0 V
    • 4% and 7% undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 8-Pin VSON package

The TPS3851-Q1 device combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851-Q1 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851-Q1 includes a programmable watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3851-Q1 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.

The TPS3851-Q1 device combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851-Q1 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851-Q1 includes a programmable watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3851-Q1 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.

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Technical documentation

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Type Title Date
* Data sheet TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. A) 19 May 2021
Functional safety information TPS3851-Q1 Functional Safety FIT Rate and Failure Mode Distribution 19 Dec 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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Simulation tool

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SON (DRB) 8 View options

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