Product
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TPS3842
  • TPS3842
  • TPS3842
  • TPS3842
  • TPS3842
  • TPS3842

TPS3842

ACTIVE

42V, small size nano-power undervoltage supervisor with programmable delay and de-glitch

Texas Instruments TPS3842 Product Info

1 April 2026 3

Parameters

Rating

Automotive

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

Adjustable

Features

Detection time delay, Low Quiescent Current, Reset time delay, Separate VDD & sense, Undervoltage monitor only

Reset threshold accuracy (%)

0.5

Iq (typ) (mA)

0.00085

Output driver type/reset output

Active-low, Open-drain

Watchdog timer WDI (s)

None

Supply voltage (min) (V)

1.9

Supply voltage (max) (V)

42

Operating temperature range (°C)

-40 to 125

Package

SOT-5X3 (DRL)-6-2.56 mm² 1.6 x 1.6

Features

  • Wide supply voltage range: 1.9V to 42V
  • VDD, SENSE, and RESET are rated to 42V
  • Low quiescent current: 850nA (typical)
  • High threshold accuracy: 0.5% (typical)
  • Fixed internal threshold voltages: 2.7V to 9.5V
  • Adjustable voltage variant: 0.7V
  • Capacitor adjustable delay time with CTR pin
  • Capacitor adjustable de-glitch time with CTS pin
  • Undervoltage open-drain, active-low output
  • Overvoltage open-drain, active-low and active-high output
  • Temperature range: –40°C to 125°C
  • Small size: SOT5X3 (DRL)
  • Wide supply voltage range: 1.9V to 42V
  • VDD, SENSE, and RESET are rated to 42V
  • Low quiescent current: 850nA (typical)
  • High threshold accuracy: 0.5% (typical)
  • Fixed internal threshold voltages: 2.7V to 9.5V
  • Adjustable voltage variant: 0.7V
  • Capacitor adjustable delay time with CTR pin
  • Capacitor adjustable de-glitch time with CTS pin
  • Undervoltage open-drain, active-low output
  • Overvoltage open-drain, active-low and active-high output
  • Temperature range: –40°C to 125°C
  • Small size: SOT5X3 (DRL)

Description

The TPS3842 is a 42V voltage supervisor with 850nA IDD, 0.5% accuracy, and a fast detection time. This device directly connects to 12V / 24V voltage rail for continuous monitoring of undervoltage (UV) or overvoltage (OV) conditions. The TPS3842 comes in a small DRL package for size constrained applications. Built-in hysteresis on the SENSE pin prevents false reset signals when monitoring a supply voltage rail. 1%, 5%, and 10% hysteresis voltage options are available to offer design flexibility to support voltage transients.

SENSE is decoupled from VDD and can monitor higher and lower voltages than VDD. Fixed threshold variants provide accurate low-Iq voltage monitoring. Adjustable threshold variants offer flexible undervoltage threshold setting with external resistors. TPS3842 offers capacitor programmable de-glitch on the SENSE with the CTS pin and capacitor programmable reset delay timing with the CTR pin.

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