Product details

Number of supplies monitored 2, 3, 4 Threshold voltage 1 (Typ) (V) 0.4 Features Push-button, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor Reset threshold accuracy (%) 1 Output driver type/reset output Active-low, Open-drain Time delay (ms) 0.02, 1, 5, 10, 20, 35, 50, 100, 150, 200, 400, 800, 1200 TI functional safety category Functional Safety-Compliant Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
Number of supplies monitored 2, 3, 4 Threshold voltage 1 (Typ) (V) 0.4 Features Push-button, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor Reset threshold accuracy (%) 1 Output driver type/reset output Active-low, Open-drain Time delay (ms) 0.02, 1, 5, 10, 20, 35, 50, 100, 150, 200, 400, 800, 1200 TI functional safety category Functional Safety-Compliant Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
SOT-23-THN (DDF) 8 5 mm² 2.9 x 1.6
  • Designed for high performance and safety:
    • Input current (4 channels): IDD = 15 µA (maximum)
    • High threshold accuracy: ±1% (maximum)
    • Built-in precision hysteresis: VHYS (VIT > 800 mV) = 0.75% (typical)
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation available to aid IEC 61508 system design
    • Systematic capability up to SIL 3
    • Hardware capability up to SIL 1
    • Self test - manual setup
  • Designed for a wide range of applications:
    • Quad, triple, dual, or single voltage supervisor
      • TPS37044, 3, 2, 1: 4, 3, 2, 1 - channels
    • Input voltage range, VDD = 1.7 V to 6 V
    • (UV / OV) threshold accuracy: ±0.1% (typical)
      • Each channel can be configured independently: window, UV, or OV
      • Window tolerance: ±3% to ±11% (can be programmed asymmetrical)
      • High threshold resolution: VIT ≤ 0.8 V: 20 mV steps VIT > 0.8 V: lower of 0.5% or 20 mV steps
      • VIT threshold voltages for each individual channel can be set independently
    • Push-button monitor on all channels
    • Reset time delay (tD): fixed time delay options
      • Options: 23-fixed time options ranging from 20 µs (minimum) to 1200 ms (maximum)
    • Temperature range: –40°C to +125°C
  • Multiple output topologies:
    • TPS3704xxxO: open-drain, active-low (RESET)
    • TPS3704xxxL: push-pull, active-low (RESET)
    • TPS3704xxxH: push-pull, active-high (RESET)
  • Designed for high performance and safety:
    • Input current (4 channels): IDD = 15 µA (maximum)
    • High threshold accuracy: ±1% (maximum)
    • Built-in precision hysteresis: VHYS (VIT > 800 mV) = 0.75% (typical)
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation available to aid IEC 61508 system design
    • Systematic capability up to SIL 3
    • Hardware capability up to SIL 1
    • Self test - manual setup
  • Designed for a wide range of applications:
    • Quad, triple, dual, or single voltage supervisor
      • TPS37044, 3, 2, 1: 4, 3, 2, 1 - channels
    • Input voltage range, VDD = 1.7 V to 6 V
    • (UV / OV) threshold accuracy: ±0.1% (typical)
      • Each channel can be configured independently: window, UV, or OV
      • Window tolerance: ±3% to ±11% (can be programmed asymmetrical)
      • High threshold resolution: VIT ≤ 0.8 V: 20 mV steps VIT > 0.8 V: lower of 0.5% or 20 mV steps
      • VIT threshold voltages for each individual channel can be set independently
    • Push-button monitor on all channels
    • Reset time delay (tD): fixed time delay options
      • Options: 23-fixed time options ranging from 20 µs (minimum) to 1200 ms (maximum)
    • Temperature range: –40°C to +125°C
  • Multiple output topologies:
    • TPS3704xxxO: open-drain, active-low (RESET)
    • TPS3704xxxL: push-pull, active-low (RESET)
    • TPS3704xxxH: push-pull, active-high (RESET)

The TPS3704x is a low-power precision window or standard voltage supervisor that can be configured as a quad, triple, dual, or single channel. Each channel has a threshold accuracy of ±1% in an 8-pin (1.6 mm x 2.9 mm) SOT-23 package offering a small solution size. The TPS3704x includes a very accurate threshold detection, with high resolution, that is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Built-in low threshold hysteresis and a fixed reset delay (tD options from 20 µs to 1200 ms) prevent false reset signals when monitoring multiple voltage rails.

The TPS3704x does not require any external resistors for setting the over and undervoltage reset thresholds, which further optimizes overall high accuracy, cost, solution size, and improves reliability for safety systems.

Separate VDD and SENSEx pins allow monitoring of rail voltages other than VDD or can be used as a push-button input. Optional use of external resistors are supported by the SENSEx pins. Each channel on the TPS3704x can be customized to its own over and undervoltage window detection with an upper and lower threshold tolerance that can be symmetric or asymmetric.

The TPS3704x is a low-power precision window or standard voltage supervisor that can be configured as a quad, triple, dual, or single channel. Each channel has a threshold accuracy of ±1% in an 8-pin (1.6 mm x 2.9 mm) SOT-23 package offering a small solution size. The TPS3704x includes a very accurate threshold detection, with high resolution, that is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Built-in low threshold hysteresis and a fixed reset delay (tD options from 20 µs to 1200 ms) prevent false reset signals when monitoring multiple voltage rails.

The TPS3704x does not require any external resistors for setting the over and undervoltage reset thresholds, which further optimizes overall high accuracy, cost, solution size, and improves reliability for safety systems.

Separate VDD and SENSEx pins allow monitoring of rail voltages other than VDD or can be used as a push-button input. Optional use of external resistors are supported by the SENSEx pins. Each channel on the TPS3704x can be customized to its own over and undervoltage window detection with an upper and lower threshold tolerance that can be symmetric or asymmetric.

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Technical documentation

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Type Title Date
* Data sheet TPS3704x Quad, Triple, Dual, Single Window or Standard Voltage Supervisor datasheet (Rev. C) PDF | HTML 27 Sep 2022
Functional safety information TPS3704 Functional Safety Analysis Report Summary (FMEDA) (Rev. A) PDF | HTML 26 May 2022
Functional safety information TPS3704 Functional Safety Report Summary (Rev. A) PDF | HTML 26 May 2022
Functional safety information TPS3704x-Q1 Functional Safety Manual (Rev. A) PDF | HTML 26 May 2022

Design & development

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Evaluation board

TPS3704Q1EVM — TPS3704 evaluation module for multichannel window supervisor with compact form factor

The TPS3704 evaluation module (EVM) is a platform for evaluating the TPS3704-Q1, which is a multichannel window supervisor and reset IC in an 8-pin, small-outline transistor (SOT-23) DDF package. TPS3704Q1EVM monitors single-, dual-, triple- and quad-voltage rails. The input voltage (...)

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Simulation model

TPS3704 and TPS3704-Q1 PSpice Transient Model

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Calculation tool

TPS3704-ADJ-CALC TPS3704 adjustable-voltage threshold-resistor calculator

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Supported products & hardware

Supported products & hardware

Products
Supervisor & reset ICs
TPS3704 Multichannel window supervisor with very-high accuracy and compact form factor TPS3704-Q1 Automotive multichannel window supervisor with very-high accuracy and compact form factor
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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SOT-23-THIN (DDF) 8 View options

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