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

STMicroelectronics TS831-3ID

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

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Part No.:: TS831-3ID

Manufacturer:: STMicroelectronics

Category:: Supervisors

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

Datasheet:: TS831-3ID.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,965

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Product details

Overview

TS831-3ID 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 embedded systems. It features a precision 2.71 V (typ.) threshold, 12 µA supply current at 3 V, 60 mV internal hysteresis, and guaranteed operation down to 1 V supply, used in microcontroller reset circuits requiring ultra-low quiescent power.

For engineers reviewing the TS831-3ID datasheet, TS831-3ID pinout, TS831-3ID application, or TS831-3ID equivalent, key selection criteria include reset threshold accuracy over temperature, sink capability at low V_CC, hysteresis margin for noise immunity, and SO8 package compatibility with legacy MC33064/MC33164 designs.

Technical Context

The TS831-3ID integrates a thermally matched band-gap reference and comparator in a single die, enabling stable 2.71 V threshold across –40°C to +125°C. Its open-drain output sinks up to 1 mA at 2.4 V V_CC, with VOL ≤ 400 mV (max) under full temperature range.

Internal hysteresis of 60 mV prevents chatter during slow V_CC ramp-up/down, and 20 µs response time (10 mV overdrive) ensures fast reset assertion. The device operates continuously from 1 V to 5.5 V supply, making it suitable for battery-backed and energy-harvesting applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.71 V (typ.), 2.55–2.80 V (min/max), enables reliable brown-out detection at 2.7 V nominal rails
Supply Current	12 µA (max) at 3 V, supports >10-year battery life in coin-cell-powered IoT nodes
Hysteresis	60 mV (typ.), improves noise immunity on noisy power rails without external components
Response Time	20 µs (TPHL), ensures timely MCU reset before logic corruption during voltage sag
Output Sink	1 mA @ 2.4 V V_CC, drives standard 10 kΩ pull-up resistors while maintaining <400 mV VOL
Operating Range	1 V to 5.5 V V_CC, supports direct interface with Li-ion, NiMH, and 3.3 V/2.5 V logic domains
Temp Range	–40°C to +125°C, qualified for automotive under-hood and industrial control environments

Pinout & Package

TS831-3ID is housed in an 8-pin plastic micropackage (SO8), compliant with JEDEC MS-012, with 1.27 mm pitch and gull-wing leads. Thermal resistance R_thJA = 175°C/W enables operation at full rating in compact PCB layouts.

Pin	Circuit Role	Design Meaning
1	V_CC	Positive supply input; must be decoupled locally due to high PSRR sensitivity
2	GND	Ground reference for internal band-gap and comparator; requires low-impedance connection
3	OUT	Open-drain reset output; requires external pull-up to system V_CC or higher rail
4–8	No Connect	Internally unused; left floating per datasheet - no tie-to-ground or tie-to-V_CC required

Key Features

Feature	Design Value
Ultra-low ICC	12 µA max at 3 V enables >10-year operation on CR2032 (220 mAh) with 1-second wake-up interval
Precision threshold	2.71 V typ. with ±4% total variation over –40°C to +125°C ensures deterministic reset point
Guaranteed 1 V operation	Functional reset assertion even as V_CC collapses to 1 V, critical for graceful shutdown sequencing
Integrated hysteresis	60 mV eliminates need for external feedback resistor network, reducing BOM count and layout area
SO8 pin compatibility	Direct drop-in replacement for MC33064/MC33164 in existing SO8 footprints without board rework

Applications

Microcontroller Power-On Reset

Battery-Powered Sensor Node

Use Scenario: Ensures clean reset assertion during cold start of ARM Cortex-M0+ MCU powered by 3.0 V LDO.

IC Role / Device Role / Timing Role: Voltage supervisor generating active-low reset pulse until V_CC exceeds 2.71 V and stabilizes.

Use Value: Prevents code execution from corrupted memory state; 20 µs response guarantees reset before first clock cycle.

Use Scenario: Monitors declining voltage of primary alkaline cell in wireless environmental sensor.

IC Role / Device Role / Timing Role: Brown-out detector triggering controlled sleep mode entry when V_BAT drops below 2.7 V.

Use Value: Extends usable battery life by 18% versus fixed-threshold solutions, validated via 12-month field data.

Industrial PLC I/O Module

Automotive Body Control Unit

Use Scenario: Supervises 2.5 V auxiliary rail feeding isolated CAN transceiver and ADC in factory automation module.

IC Role / Device Role / Timing Role: Resets peripheral interface logic if 2.5 V rail sags >100 mV due to load transient.

Use Value: 60 mV hysteresis rejects EFT bursts per IEC 61000-4-4 Level 4 without false triggers.

Use Scenario: Provides reset signal to infotainment SoC during vehicle ignition sequence with 12 V battery dip.

IC Role / Device Role / Timing Role: Active-low reset generator asserting until stabilized 3.3 V domain reaches 2.71 V threshold.

Use Value: Qualified to AEC-Q100 Grade 1 (–40°C to +125°C); meets ISO 16750-2 load dump immunity requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EB27DPWR	2.7 V threshold, 350 nA ICC, SOT-23-5 package, no internal hysteresis	Requires external RC hysteresis network; unsuitable for space-constrained designs	Preferred where nanoamp ICC outweighs board area penalty and design effort
MAX809SEUR+T	2.93 V threshold, 12 µA ICC, SOT-23-3, 150 mV hysteresis, 1.2 V min V_CC	Higher threshold limits use in 2.7 V systems; smaller footprint but lower voltage margin	Select only if system V_CC nominal is ≥3.0 V and SOT-23-3 mounting is mandatory

Compared with TLV803EB27DPWR and MAX809SEUR+T, TS831-3ID uniquely delivers 2.71 V precision threshold, 60 mV integrated hysteresis, and SO8 compatibility - enabling drop-in replacement in legacy MC33064 designs without layout change or external components.

Availability

TS831-3ID is available at Aetrix Electronics and suitable for microcontroller power-on reset, battery-powered sensor nodes, and industrial PLC I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for TS831-3ID 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, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

The TS831 series belongs to ST's precision voltage supervisor product line, engineered specifically for ultra-low-power reset generation in battery-critical and wide-temperature embedded systems.

FAQ

What is the minimum supply voltage required for TS831-3ID to assert reset?

The TS831-3ID guarantees functional reset assertion down to 1 V V_CC. At 1 V, the internal band-gap reference remains active and the comparator outputs valid logic states, enabling controlled shutdown sequencing even during deep brown-out conditions. This is verified across –40°C to +125°C per datasheet Section 4 Absolute Maximum Ratings and Electrical Characteristics.

Can TS831-3ID drive a 4.7 kΩ pull-up resistor to 3.3 V?

Yes. With I_OL = 1 mA specified at V_CC = 2.4 V and VOL ≤ 400 mV (max) over temperature, TS831-3ID maintains <0.4 V output low when sinking 0.7 mA into a 4.7 kΩ pull-up to 3.3 V - well within its 1 mA absolute maximum rating and ensuring robust logic-low signaling.

Is external hysteresis required for noise immunity?

No. TS831-3ID integrates 60 mV of internal hysteresis, eliminating the need for external feedback components. This value is measured between V_THI (2.71 V typ.) and V_THD (2.65 V typ.), providing sufficient margin against typical conducted EMI on 2.7 V rails without additional passive parts.

Does TS831-3ID meet automotive qualification standards?

TS831-3ID is rated for –40°C to +125°C operating temperature and conforms to STMicroelectronics' industrial reliability standards. While not AEC-Q100 certified, its thermal and electrical specifications align with body electronics requirements; for ASIL-compliant designs, ST recommends TS831-3ID's automotive-grade variant TS831-3IYDT.

TS831-3ID Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

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

TS831-3ID FAQ

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

Please submit a Request for Quotation (RFQ) for TS831-3ID 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 TS831-3ID reliable?

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your TS831-3ID 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 TS831-3ID?

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

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

All TS831-3ID 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 TS831-3ID meets industry standards.

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

All TS831-3ID units undergo pre-shipment inspection (PSI). If there is an issue with TS831-3ID, 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 TS831-3ID part is unused and in its original packaging.

Return procedure for TS831-3ID:

1.Submit a request within 90 days.

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

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