Product details

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Trimmable, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.4, 2.5, 2.7, 2.8, 2.9, 3, 3.1, 3.5, 4.0, 4.2, 4.3, 4.4, 4.5, 4.6, 4.8, 4.9 Features Manual reset capable Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable, 0 Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Trimmable, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.4, 2.5, 2.7, 2.8, 2.9, 3, 3.1, 3.5, 4.0, 4.2, 4.3, 4.4, 4.5, 4.6, 4.8, 4.9 Features Manual reset capable Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable, 0 Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • Wide operating voltage: 1.5 V to 10 V
  • Nano supply current: 300 nA (Typ), 700 nA (Max)
  • Fixed threshold voltage (VIT-)
    • Threshold from 1.6 V to 4.9 V in 0.1-V steps
    • High accuracy: 1% (Typ), 1.5% (Max)
    • Built-in hysteresis (VIT+)
      • 1.6 V < VIT- ≤ 3.0 V = 100 mV (Typical)
      • 3.1 V ≤ VIT- < 4.9 V = 200 mV (Typical)
  • Start-up delay (tSTRT): 220 µs (Typ), 350 µs (Max)
    • Programmable reset time delay (tD):
      • 50 µs (no capacitor) to 6.2 s (10-µF)
    • Active-low manual reset (MR)
    • Three output topologies:
      • TPS3840DL: open-drain, active-low (RESET), requires pull-up resistor
      • TPS3840PL: push-pull, active-low (RESET)
      • TPS3840PH: push-pull, active-high (RESET)
    • Wide temperature range: –40°C to +125°C
    • Package: SOT23-5 (DBV)
    • Wide operating voltage: 1.5 V to 10 V
    • Nano supply current: 300 nA (Typ), 700 nA (Max)
    • Fixed threshold voltage (VIT-)
      • Threshold from 1.6 V to 4.9 V in 0.1-V steps
      • High accuracy: 1% (Typ), 1.5% (Max)
      • Built-in hysteresis (VIT+)
        • 1.6 V < VIT- ≤ 3.0 V = 100 mV (Typical)
        • 3.1 V ≤ VIT- < 4.9 V = 200 mV (Typical)
    • Start-up delay (tSTRT): 220 µs (Typ), 350 µs (Max)
      • Programmable reset time delay (tD):
        • 50 µs (no capacitor) to 6.2 s (10-µF)
      • Active-low manual reset (MR)
      • Three output topologies:
        • TPS3840DL: open-drain, active-low (RESET), requires pull-up resistor
        • TPS3840PL: push-pull, active-low (RESET)
        • TPS3840PH: push-pull, active-high (RESET)
      • Wide temperature range: –40°C to +125°C
      • Package: SOT23-5 (DBV)

      Wide Vin allows monitoring 9V rails or batteries without external components and 24V rails with external resistors. Nano-Iq extends battery life for low power applications and minimizes current consumption when using external resistors. Fast start-up delay allows the detection of a voltage fault before the rest of the system powers up providing maximum safety in hazardous start-up fault conditions. Low Power-on-Reset (VPOR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down.

      Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset (MR) is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.

      Additional features: Built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)).












      Wide Vin allows monitoring 9V rails or batteries without external components and 24V rails with external resistors. Nano-Iq extends battery life for low power applications and minimizes current consumption when using external resistors. Fast start-up delay allows the detection of a voltage fault before the rest of the system powers up providing maximum safety in hazardous start-up fault conditions. Low Power-on-Reset (VPOR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down.

      Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset (MR) is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.

      Additional features: Built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)).












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      Technical documentation

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      Type Title Date
      * Data sheet TPS3840 Nano Power, High Input Voltage Supervisor With MR and Programmable Delay datasheet (Rev. D) 29 Jan 2020
      White paper Overcoming Low-IQ Challenges in Low-Power Applications (Rev. A) 15 Sep 2021
      User guide TPS3840EVM Voltage Supervisor User's Guide (Rev. A) 13 May 2021
      Technical article Monitoring 12-V automotive battery systems: Load-dump, cold-crank and false-reset management 24 Mar 2021
      White paper 克服低功耗應用中的低 IQ 挑戰 11 Mar 2021
      White paper 저전력 애플리케이션의 저 IQ 문제점 극복 11 Mar 2021
      Application note Back-up Power Supply Switchover with Supply Voltage Supervisor & Power & Power M 09 Apr 2020
      E-book Ein Techniker-Leitfaden für Industrieroboter-Designs 25 Mar 2020
      Application note Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) 17 Mar 2020
      Application note Programmable Push-Button, Pulse Detector, and Pulse Generator Solutions 10 Mar 2020
      E-book E-book: An engineer’s guide to industrial robot designs 12 Feb 2020
      E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
      Application note Comparing Voltage and Processor Monitoring Solutions 05 Apr 2019
      Technical article Voltage supervisor requirements for e-meter applications 18 Jan 2019
      Technical article Improve circuit breaker leakage current response with a voltage supervisor 10 Jan 2019
      Application note Mitigating the Voltage Glitch on the Output of a Voltage Supervisor (Reset IC) D 27 Jun 2018

      Design & development

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      Evaluation board

      TPS3840EVM — TPS3840 nanopower high-input voltage supervisor evaluation module

      The TPS3840 evaluation module (EVM)  is a platform for evaluating the TPS3840 device, which is a nanopower voltage supervisor with manual reset and programmable reset delay. TPS3840 offers operation up to 10 V, while maintaining very-low quiescent current of 350 nA (typ) in addition to 1 (...)

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      TPS3840PH30 Unencrypted PSpice Transient Model

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      TPS3840PL28 PSpice Transient Model

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      TPS3840DL27 PSpice Transient Model

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      TPS3840DL28 PSPICE TRANSIENT UNENCRYPTED MODEL

      SNVMBR7.ZIP (97 KB) - PSpice Model
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      TPS3840PL25 PSPICE TRANSIENT UNENCRYPTED MODEL

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      Simulation tool

      PSPICE-FOR-TI — PSpice® for TI design and simulation tool

      PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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      TIDA-010041 — Nano power, wide VIN (12 V max) supervisor reference design used as comparator or power sequencer

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      SOT-23 (DBV) 5 View options

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