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STMicroelectronics TS831-3IPT
- Part No.:
- TS831-3IPT
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS831-3IPT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,563
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Product details
Overview
TS831-3IPT from STMicroelectronics is a micropower voltage supervisor IC with active-low open-drain reset output, designed for power-on reset and power-fail detection in low-voltage microcontroller systems. It features a precision 2.71 V (typ.) threshold, guaranteed operation down to 1 V supply, 12 µA max supply current at 3 V, 60 mV internal hysteresis, and 20 µs response time under 10 mV overdrive.
For engineers reviewing the TS831-3IPT datasheet, TS831-3IPT pinout, TS831-3IPT application, or TS831-3IPT 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 TS831-3IPT integrates a thermally matched band-gap reference and comparator with built-in hysteresis (60 mV typ.), enabling robust noise immunity during brown-out conditions. Its open-drain output requires an external pull-up and asserts low when VCC falls below the 2.71 V threshold - with VTHD = 2.65 V (typ.) on falling VCC.
It operates across 1 V to 5.5 V supply range and maintains <12 µA ICC at 3 V, making it suitable for coin-cell and energy-harvesting applications. The device guarantees reset functionality over full industrial temperature range (-40°C to +125°C) without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.71 V (typ.), 2.55–2.80 V (min/max); sets precise power-fail detection point for 3 V systems. |
| Supply Current | 12 µA max at 3 V; enables multi-year operation on CR2032 batteries in always-on monitoring. |
| Hysteresis | 60 mV (typ.), 30–100 mV (min/max); prevents chatter during slow VCC recovery near threshold. |
| Response Time | 20 µs (RL = 10 kΩ, CL = 15 pF, 10 mV overdrive); ensures timely reset assertion before MCU state corruption. |
| Output Type | Open-drain, sink capability up to 1 mA at 2.4 V; compatible with 1.8–5 V logic families via pull-up selection. |
| Operating Voltage | 1 V to 5.5 V; supports single-cell LiFePO₄, NiMH, and regulated 3.3 V/2.5 V rails. |
| Temperature Range | -40°C to +125°C; qualified for automotive body electronics and industrial control environments. |
Pinout & Package
TSSOP8 (Thin Shrink Small Outline Package), 8-pin, lead-free, RoHS-compliant surface-mount package with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Supply Input | Monitored VCC rail; connects directly to system power node under supervision. |
| 2 (GND) | Ground Reference | Common return path for reference and output; must be low-impedance to avoid threshold shift. |
| 3 (OUT) | Open-Drain Output | Active-low reset signal; requires external pull-up resistor to host logic voltage (e.g., 3.3 V). |
| 4–8 | No Connect | Internally unused; left floating per datasheet - no PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 12 µA max at 3 V enables >10-year battery life in wake-on-reset sensor nodes. |
| Guaranteed 1 V operation | Valid reset assertion even during deep brown-out, critical for fail-safe MCU shutdown. |
| Thermally matched threshold resistors | Ensures ±1.5% threshold stability over -40°C to +125°C without calibration. |
| Integrated hysteresis | 60 mV fixed hysteresis eliminates need for external feedback network or RC timing. |
| Pin-to-pin compatibility | Direct replacement for MC33064 and MC33164 in SO8 and TSSOP8 footprints. |
Applications
| Smart Meter Power Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Detects main supply collapse during battery swap or alternator failure in utility meters. IC Role / Device Role / Timing Role: Voltage supervisor providing clean, glitch-free reset to ARM Cortex-M0+ MCU upon VCC dip below 2.71 V. Use Value: Prevents EEPROM corruption and ensures meter firmware resumes from known safe state after power recovery. |
Use Scenario: Monitors 12 V rail derating in door module ECUs during cold cranking (<6.5 V). IC Role / Device Role / Timing Role: Resets LIN transceiver and local MCU when supply drops below 2.71 V, avoiding bus arbitration errors. Use Value: Eliminates need for discrete Zener + transistor reset circuit, reducing BOM count by 4 components. |
| Portable Medical Sensor Node | Industrial PLC I/O Module |
Use Scenario: Supervises coin-cell–powered pulse oximeter during sleep/wake cycles. IC Role / Device Role / Timing Role: Generates hardware reset when VBAT decays to 2.71 V, triggering graceful shutdown before data loss. Use Value: 12 µA ICC extends CR2032 lifetime beyond 5 years in intermittent-sampling mode. |
Use Scenario: Ensures deterministic restart of FPGA-based digital I/O controller after 24 V DC supply interruption. IC Role / Device Role / Timing Role: Provides synchronized reset pulse to FPGA configuration logic and isolated RS-485 transceivers. Use Value: 20 µs response guarantees reset assertion within first clock cycle of FPGA startup sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 2.93 V fixed threshold; 1.2 µA ICC at 3 V; SOT-23-3 package; no hysteresis (requires external R/C) | Lower ICC but higher threshold; unsuitable for 3 V systems needing margin below 2.8 V | Select only if threshold tolerance >±3% is acceptable and board space favors SOT-23 over TSSOP8. |
| TPS3808G12QDBVRQ1 | 1.2 V adjustable threshold via external resistor divider; 1.1 µA ICC; automotive-grade AEC-Q100 Grade 1 | Configurable threshold enables reuse across multiple rail voltages; requires two external resistors | Prefer when design requires flexibility across 1.8 V/2.5 V/3.3 V rails and AEC-Q100 compliance is mandatory. |
Compared with MAX809SEUR+T and TPS3808G12QDBVRQ1, the TS831-3IPT delivers tighter threshold accuracy (±2.5% over temp), integrated hysteresis, and guaranteed 1 V operation - making it optimal for cost-sensitive, space-constrained 3 V systems where fixed 2.71 V reset is required without external components.
Availability
TS831-3IPT is available at Aetrix Electronics and suitable for smart meter power monitoring, automotive body control modules, portable medical sensor nodes, and industrial PLC I/O modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TS831-3IPT 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 microcontrollers, analog ICs, power management, and automotive-grade silicon.
The TS831 series belongs to ST's voltage supervisor product line, engineered specifically for ultra-low-power, high-reliability reset generation in battery-operated and harsh-environment embedded systems.
FAQ
What is the minimum supply voltage required for TS831-3IPT to assert reset?
The TS831-3IPT guarantees valid reset assertion down to 1 V supply, with the comparator remaining functional and the open-drain output capable of sinking current even at VCC = 1 V. This is confirmed in the Absolute Maximum Ratings and Operating Conditions tables, where VCC min = 1 V is explicitly specified for normal operation.
Can TS831-3IPT drive a 10 kΩ pull-up to 3.3 V directly?
Yes - at VCC = 2.4 V and TA = +125°C, VOL is guaranteed ≤500 mV with IOL = 1 mA. With a 10 kΩ pull-up to 3.3 V, sink current is ~330 µA, well within the 1 mA limit, ensuring reliable logic-low assertion across temperature.
Is external hysteresis required for TS831-3IPT?
No - the device integrates 60 mV (typ.) internal hysteresis between rising and falling threshold voltages (VTHI = 2.71 V, VTHD = 2.65 V). This eliminates the need for external positive feedback resistors and ensures stable reset release without oscillation during slow supply recovery.
Does TS831-3IPT support AEC-Q100 qualification?
No - the TS831-3IPT is not AEC-Q100 qualified. It is rated for industrial temperature range (-40°C to +125°C) and intended for non-safety-critical automotive applications such as body electronics. For AEC-Q100 Grade 1 or Grade 2 compliance, consider ST's automotive-qualified alternatives like the STM8AF series supervisors.
TS831-3IPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
TS831-3IPT FAQ
1.How can I place an order for TS831-3IPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS831-3IPT 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 TS831-3IPT reliable?
The price and inventory of TS831-3IPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS831-3IPT is usually 5 days.
3.What payment methods are accepted for TS831-3IPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS831-3IPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS831-3IPT?
TS831-3IPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS831-3IPT 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 TS831-3IPT?
For technical support, including TS831-3IPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS831-3IPT requirements.
6.How does Aetrix verify that TS831-3IPT is sourced from the original manufacturer or authorized distributors?
All TS831-3IPT 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 TS831-3IPT meets industry standards.
7.What is the process for return or replacement of TS831-3IPT?
All TS831-3IPT units undergo pre-shipment inspection (PSI). If there is an issue with TS831-3IPT, 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 TS831-3IPT part is unused and in its original packaging.
Return procedure for TS831-3IPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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