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

STMicroelectronics TS831-5IDT

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

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Part No.:: TS831-5IDT

Manufacturer:: STMicroelectronics

Category:: Supervisors

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

Datasheet:: TS831-5IDT.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TS831-5IDT from STMicroelectronics is an ultra-low-power voltage supervisor IC with active-low open-drain reset output, precision 4.33V threshold (typ.), 12µA supply current at 5V, guaranteed operation down to 1V V_CC, and 20µs response time under 10mV overdrive - used for power-on reset generation in battery-powered microcontrollers.

For engineers reviewing the TS831-5IDT datasheet, TS831-5IDT pinout, TS831-5IDT application, or TS831-5IDT equivalent, key selection criteria include reset threshold accuracy across temperature, ultra-low ICC stability at low V_CC, hysteresis margin (100mV), open-drain drive capability (8mA sink), and SO8 package compatibility with legacy MC33064/MC33164 designs.

Technical Context

The TS831-5IDT integrates a thermally matched band-gap reference and comparator with internal hysteresis (100mV) to reject noise-induced false resets. It operates from 1V to 5.5V supply and delivers active-low reset assertion when V_CC falls below 4.33V (typ.) during power-down or brownout.

Its open-drain output requires an external pull-up and sinks up to 8mA at V_CC = 4V with VOL ≤ 1.3V over full -40°C to +125°C range. The 20µs propagation delay (TPHL) is specified under RL = 10kΩ, CL = 15pF, and 10mV overdrive - enabling fast, deterministic reset signaling in real-time embedded systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.33V typ., 4.11–4.50V min/max over -40°C to +125°C - ensures reliable power-on detection across industrial temperature range
Supply Current	12µA max at V_CC = 5V - enables multi-year operation in coin-cell or energy-harvesting applications
Operating Voltage	1V to 5.5V - supports direct monitoring of 1.8V, 3.3V, and 5V rails without external regulation
Response Time	20µs TPHL with 10mV overdrive - provides sub-microsecond reset assertion for high-speed MCU initialization
Hysteresis	100mV - prevents oscillation during slow V_CC ramp-up/down and improves noise immunity
Output Type	Open-drain, 8mA sink capability at V_CC = 4V - allows flexible logic-level translation and wired-OR reset bus configuration
Temperature Range	-40°C to +125°C - qualified for automotive under-hood and industrial control environments

Pinout & Package

TS831-5IDT is housed in an 8-pin SO (Small Outline) plastic micropackage (SO8), compliant with JEDEC MS-012, with 1.27mm pitch and gull-wing leads.

Pin	Circuit Role	Design Meaning
1	V_CC	Positive supply input - accepts 1V to 5.5V; powers internal reference and comparator
2	GND	Ground reference - must be connected directly to system ground plane for stable threshold accuracy
3	RESET	Open-drain reset output - pulled low when V_CC < V_TH; requires external pull-up resistor
4–8	No Connect	Internally unused pins - left unconnected per datasheet; no electrical function or thermal benefit

Key Features

Feature	Design Value
Ultra-low quiescent current	12µA max at 5V - extends battery life in portable and remote sensor nodes
Precision threshold with thermal matching	4.33V typ. with ±2.2% variation over -40°C to +125°C - eliminates need for external trimming
Guaranteed reset at low V_CC	Functional down to 1V supply - enables reset assertion even during deep brownout or backup battery switchover
Integrated hysteresis	100mV fixed - removes requirement for external hysteresis resistor network and saves PCB area
Fast, deterministic response	20µs TPHL with 10mV overdrive - ensures synchronous MCU reset before clock stabilization

Applications

Power-On Reset Generator

Microcontroller Brownout Detector

Use Scenario: Microcontroller startup sequence requiring clean reset pulse after power rail stabilizes.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET signal until V_CC exceeds 4.33V and remains stable for >100µs.

Use Value: Prevents code execution from corrupted memory or unstable clock by enforcing minimum power-up hold time.

Use Scenario: Real-time embedded system operating on fluctuating 3.3V rail subject to load transients.

IC Role / Device Role / Timing Role: Continuous V_CC monitoring; triggers reset if supply dips below 4.11V for >20µs.

Use Value: Avoids silent data corruption or state machine lockup during brief voltage sags without requiring software polling.

Industrial Sensor Node Supervisor

Automotive Body Control Module Monitor

Use Scenario: Low-power wireless sensor node powered by CR2032 battery with 2.0–3.0V discharge curve.

IC Role / Device Role / Timing Role: Resets MCU when battery voltage drops below 2.71V (TS831-3 variant); TS831-5IDT used for 4.33V Li-ion or regulated 5V subsystems.

Use Value: Enables graceful shutdown and non-volatile state save before brownout-induced data loss.

Use Scenario: 12V automotive system with local 5V DC/DC converter powering body control MCU.

IC Role / Device Role / Timing Role: Monitors 5V rail for undervoltage events during cold-crank or alternator failure.

Use Value: Ensures fail-safe reset within 20µs to prevent erroneous actuator commands during power anomaly.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC33064DR2G	4.3V threshold, 25µA ICC, no hysteresis - requires external hysteresis resistor network	Lacks integrated 100mV hysteresis; slower 60µs response; wider threshold tolerance (±5%)	Choose only if legacy footprint reuse is mandatory and external component count is acceptable
TPS3808G33DBVR	3.3V threshold, 1.8µA ICC, push-pull output - not pin-compatible; requires board redesign	Lower threshold and current, but incompatible pinout and active-high output polarity	Select when ultra-low ICC (<2µA) and 3.3V rail supervision are primary requirements

Compared with MC33064DR2G and TPS3808G33DBVR, TS831-5IDT uniquely combines 4.33V precision, 12µA ICC, integrated 100mV hysteresis, and SO8 pin compatibility - delivering drop-in reliability for industrial and automotive reset circuits without design iteration.

Availability

TS831-5IDT is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and battery-powered IoT edge devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS831-5IDT 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, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.

TS831 belongs to ST's voltage supervisor product line, engineered specifically for robust, low-power reset generation in harsh environments where supply rail integrity is mission-critical - not general-purpose comparators or references.

FAQ

What is the minimum V_CC required for TS831-5IDT to assert a valid reset?

The TS831-5IDT guarantees functional reset operation down to 1V V_CC. At this level, the internal band-gap reference remains stable enough to compare against the 4.33V threshold, and the comparator output transitions reliably. This enables use in backup power domains or deep brownout recovery scenarios where other supervisors fail.

Can TS831-5IDT drive a 10kΩ pull-up resistor directly?

Yes - with V_CC = 4V and I_OL = 8mA, VOL is guaranteed ≤1.3V across -40°C to +125°C. A 10kΩ pull-up to 5V yields ~0.5mA sink current, well within spec, resulting in RESET low voltage <100mV - sufficient for TTL and CMOS input thresholds.

Is the 100mV hysteresis adjustable or fixed?

The 100mV hysteresis is fixed and internally generated via precision resistor ratios laser-trimmed during wafer test. It cannot be modified externally. This eliminates variability from temperature drift or PCB layout parasitics that affect discrete hysteresis networks.

Does TS831-5IDT require an external capacitor on the RESET pin?

No external capacitor is required for basic reset functionality. However, a small 100pF–1nF capacitor may be added between RESET and GND to filter high-frequency noise on long traces - but it must not exceed timing limits imposed by the 20µs response specification or MCU reset deassertion requirements.

TS831-5IDT 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:: 4.33V

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

TS831-5IDT FAQ

1.How can I place an order for TS831-5IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS831-5IDT 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 TS831-5IDT reliable?

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

3.What payment methods are accepted for TS831-5IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS831-5IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS831-5IDT?

TS831-5IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS831-5IDT 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 TS831-5IDT?

For technical support, including TS831-5IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS831-5IDT requirements.

6.How does Aetrix verify that TS831-5IDT is sourced from the original manufacturer or authorized distributors?

All TS831-5IDT 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 TS831-5IDT meets industry standards.

7.What is the process for return or replacement of TS831-5IDT?

All TS831-5IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS831-5IDT, 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 TS831-5IDT part is unused and in its original packaging.

Return procedure for TS831-5IDT:

1.Submit a request within 90 days.

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

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