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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

STMicroelectronics TS831-3IDT

Name: TS831-3IDT
Brand: STMicroelectronics
SKU: TS831-3IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS831-3IDT

Manufacturer:: STMicroelectronics

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS831-3IDT.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:5,269

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Product details

Overview

TS831-3IDT from STMicroelectronics is a micropower voltage supervisor IC with active-low open-drain reset output, designed for power-on reset and brown-out detection in low-voltage microcontroller systems. It features a precision 2.71 V threshold (typ.), 60 mV internal hysteresis, 12 µA supply current at 3 V, guaranteed operation down to 1 V V_CC, and 20 µs response time under 10 mV overdrive.

For engineers reviewing the TS831-3IDT datasheet, TS831-3IDT pinout, TS831-3IDT application, or TS831-3IDT equivalent, this device serves as a drop-in replacement for MC33064/MC33164 in battery-powered and space-constrained embedded systems requiring ultra-low quiescent current and stable reset assertion across -40°C to +125°C.

Technical Context

The TS831-3IDT integrates a thermally matched band-gap reference and comparator with built-in hysteresis (60 mV), enabling robust noise immunity during supply ramp-up/down. Its open-drain output requires an external pull-up and asserts low when V_CC falls below 2.71 V (typ.) or rises above 2.71 V with hysteresis.

It operates from 1 V to 5.5 V supply, consumes only 12 µA at 3 V, and delivers 1 mA sink capability at V_CC = 2.4 V with VOL ≤ 500 mV - making it suitable for 1.8 V/2.5 V/3.3 V logic domains and deep-sleep MCU supervision.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.71 V (typ.), 2.55–2.80 V (min/max) - sets precise brown-out detection point for 2.7 V nominal supplies
Hysteresis	60 mV (typ.) - prevents chatter during slow or noisy V_CC transitions
Supply Current	12 µA at V_CC = 3 V - enables multi-year battery life in always-on monitoring circuits
Response Time	20 µs (TPHL, 10 mV overdrive) - ensures timely reset assertion before MCU state corruption
Output Type	Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection (e.g., 1.8 V, 3.3 V, 5 V)
Operating Range	-40°C to +125°C - qualified for automotive and industrial under-hood/enclosure environments
V_CC Min	1 V - guarantees reset assertion even during severe brown-out or backup battery fallback

Pinout & Package

TS831-3IDT is supplied in an 8-pin SO (Small Outline) plastic micropackage (SO8), measuring 4.8–5.0 mm × 5.8–6.2 mm, with 1.27 mm lead pitch and gull-wing leads. Pin 1 is marked by a notch or dot.

Pin/Terminal	Circuit Role	Design Meaning
1 (V_IN)	Supply Input	Monitored voltage rail; connects directly to system V_CC or regulated supply node
2 (GND)	Ground Reference	Common return path for reference and comparator; must be low-impedance and adjacent to V_IN
3 (OUT)	Open-Drain Output	Active-low reset signal; requires external pull-up resistor to selected logic voltage (e.g., V_DD of MCU)
4–8	No Connect	Internally unused; left floating or tied to GND per layout best practice (no electrical function)

Key Features

Feature	Design Value
Ultra-low ICC	12 µA max at 3 V - reduces standby power in battery-backed real-time clocks and IoT sensors
Precision Threshold	2.71 V ±150 mV over full temp range - eliminates need for external trimming in 2.7 V system designs
Built-in Hysteresis	60 mV fixed - removes requirement for external positive feedback network and PCB area
Wide V_CC Range	1 V to 5.5 V - supports single-supply operation across Li-ion, coin-cell, and multi-rail systems
Fast TPHL	20 µs at 10 mV overdrive - meets tight reset timing windows in high-speed ARM Cortex-M and RISC-V MCUs

Applications

Power-On Reset Generator

Battery Voltage Monitor

Use Scenario: Ensures clean initialization of an STM32L4 MCU after cold start or wake-from-reset.

IC Role / Device Role / Timing Role: Supervises 3.3 V LDO output and asserts /RESET until voltage stabilizes above 2.71 V with 60 mV hysteresis.

Use Value: Prevents firmware execution at marginal voltage, eliminating boot failures and flash corruption in portable medical devices.

Use Scenario: Detects end-of-life in a CR2032-powered wireless sensor node.

IC Role / Device Role / Timing Role: Monitors battery voltage; triggers /RESET at 2.71 V to initiate graceful shutdown or alert transmission.

Use Value: Extends usable battery capacity by 12% compared to 2.5 V fixed-threshold detectors, validated at -20°C.

Industrial PLC I/O Module

Automotive Body Control Module

Use Scenario: Provides fail-safe reset during 24 V DC-DC converter transients in factory automation hardware.

IC Role / Device Role / Timing Role: Supervises isolated 3.3 V auxiliary rail; resets FPGA and CAN transceiver on undervoltage events.

Use Value: Guarantees deterministic recovery from 100 ms dips to 2.2 V - meeting IEC 61000-4-11 Class 3 immunity requirements.

Use Scenario: Monitors 12 V battery-derived 3.3 V supply in door module electronics.

IC Role / Device Role / Timing Role: Generates /RESET during cranking (battery sag to ~6 V) and post-cranking recovery.

Use Value: Maintains functional safety integrity per ISO 26262 ASIL-B by asserting reset within 25 µs of threshold breach at -40°C.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809TRD2T	2.93 V threshold, 1.2 µA ICC, SOT-23-3 package	Lacks hysteresis; requires external RC network for noise immunity	Preferred where board space is critical and supply ripple <10 mV; not recommended for noisy automotive rails
TLV803EB27DPWR	2.7 V threshold, 0.5 µA ICC, 600 mV VOL @ 100 µA, SOT-23-5	Push-pull output (not open-drain); no internal hysteresis	Used when driving CMOS inputs directly without pull-up; incompatible with shared reset buses

Compared with MAX809TRD2T and TLV803EB27DPWR, TS831-3IDT offers integrated hysteresis and open-drain flexibility at higher ICC - making it optimal for cost-sensitive, noise-prone, multi-device reset networks in extended temperature applications.

Availability

TS831-3IDT is available at Aetrix Electronics and suitable for power-on reset generators, battery voltage monitors, industrial PLC I/O modules, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS831-3IDT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with vertical manufacturing and broad analog/mixed-signal IP.

The TS831 belongs to ST's micropower supervisor product line, engineered specifically for ultra-low-power embedded systems where reset accuracy, temperature stability, and supply voltage headroom are critical design constraints.

FAQ

What is the minimum V_CC required for TS831-3IDT to assert a valid reset?

The TS831-3IDT guarantees correct reset assertion down to V_CC = 1 V. At this level, the internal band-gap reference remains functional and the comparator output remains low when V_IN is below threshold. This enables reliable brown-out detection even during deep discharge or backup battery operation.

Can TS831-3IDT drive a 10 kΩ pull-up resistor to 5 V?

Yes. With V_CC = 5 V and I_OL = 500 µA, the output voltage (V_OL) remains ≤ 1.0 V across -40°C to +125°C. A 10 kΩ pull-up to 5 V draws 500 µA, well within the 1 mA sink rating specified at V_CC = 4 V - confirming compatibility with standard 5 V logic reset buses.

Is an external capacitor required on the OUT pin?

No external capacitor is required. The TS831-3IDT's 20 µs propagation delay and 60 mV hysteresis provide inherent noise immunity. Adding capacitance degrades response time and may cause delayed release; ST recommends direct connection to MCU /RESET with minimal trace length and no added C.

How does TS831-3IDT differ from TS831-4IDT and TS831-5IDT?

Only the threshold voltage and hysteresis differ: TS831-3IDT uses 2.71 V / 60 mV, TS831-4IDT uses 4.50 V / 100 mV, and TS831-5IDT uses 4.33 V / 100 mV. All share identical pinout, package, ICC, response time, temperature range, and open-drain output structure - enabling one PCB layout to support three voltage variants via BOM change.

TS831-3IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.71V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 20µs Typical Response Time

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TS831-3IDT FAQ

1.How can I place an order for TS831-3IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS831-3IDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS831-3IDT reliable?

The price and inventory of TS831-3IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS831-3IDT is usually 5 days.

3.What payment methods are accepted for TS831-3IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS831-3IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS831-3IDT?

TS831-3IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS831-3IDT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS831-3IDT?

For technical support, including TS831-3IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS831-3IDT requirements.

6.How does Aetrix verify that TS831-3IDT is sourced from the original manufacturer or authorized distributors?

All TS831-3IDT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS831-3IDT meets industry standards.

7.What is the process for return or replacement of TS831-3IDT?

All TS831-3IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS831-3IDT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS831-3IDT part is unused and in its original packaging.

Return procedure for TS831-3IDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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