Product details


Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Trimmable, 1.6, 2.5, 2.7, 2.8, 2.9, 3.0, 3.1, 4.1, 4.2, 4.4, 4.5 Features Manual reset Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable, 0 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Supervisor & reset ICs


  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • Wide operating voltage : 1.5 V to 10 V
    • Use external resistors to extend Vin range
  • Nano supply current : 350 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)
  • Fast start-up delay (tSTRT): 350 µs (Max)
  • Programmable capacitor-based reset time delay:
    • tD: 50 µs (no capacitor) to 6.2 s (10-µF)
  • Active-low manual reset (MR)
  • Three output topologies:
    • TPS3840DL-Q1: open-drain, active-low (RESET)
    • TPS3840PL-Q1: push-pull, active-low (RESET)
    • TPS3840PH-Q1: push-pull, active-high (RESET)
  • Package: 5-pin SOT-23 (DBV)

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open-in-new Find other Supervisor & reset ICs


The TPS3840-Q1 family of voltage supervisors or reset ICs can operate at high voltage levels while maintaining very low quiescent current across the whole VDD and temperature range. TPS3840-Q1 offers best combination of low power consumption, high accuracy and low propagation delay (tp_HL= 30 µs typical).

Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset (MR) 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: Low power-on reset voltage (VPOR), built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)). TPS3840-Q1 is a perfect voltage monitoring solution for automotive applications and battery-powered / low power applications.

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Technical documentation

Design & development

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Hardware development


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 (...)

  • Manual reset
  • Programmable reset delay
  • Active-low/active-high output logic
  • Open-drain/push-pull output topology

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

High efficiency, low-noise 5-V/3.3-V/1.8-V/1.1-V automotive display reference design
PMP22334 — This reference design is for an automotive display application with a customized form factor. The design demonstrates the excellent thermal performance of LM61460-Q1 with its HotRod™ QFN package as well as the low EMI aided by its spread spectrum feature. It generates four (...)
document-generic Schematic

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SOT-23 (DBV) 5 View options

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