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STMicroelectronics STM810TWX6F
- Part No.:
- STM810TWX6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
STM810TWX6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
STM810TWX6F from STMicroelectronics is an industrial-grade active-high push-pull reset supervisor IC for 3.0 V supply monitoring. It asserts a valid RST signal down to VCC = 1.0 V, delivers a guaranteed minimum 140 ms reset pulse width, and draws only 6 µA typical supply current. Used in microcontroller power-up sequencing for embedded instrumentation and industrial control systems.
For engineers reviewing the STM810TWX6F datasheet, STM810TWX6F pinout, STM810TWX6F application, or STM810TWX6F equivalent, key selection criteria include its 3.00–3.15 V reset threshold (T-grade), SOT23-3 package compatibility, guaranteed RST assertion at low VCC, and absence of manual reset input - distinguishing it from STM811/812 variants.
Technical Context
The STM810TWX6F implements a precision voltage comparator with hysteresis to monitor VCC against a factory-trimmed 3.08 V threshold (25 °C), maintaining ±0.15 V tolerance over –40 °C to +85 °C. Its internal timer generates a fixed-duration reset pulse after power-up or brownout recovery.
No manual reset (MR) input is present - unlike STM811/812 - and the device provides only active-high RST output with push-pull drive capability. Reset assertion remains valid down to VCC = 1.0 V, and the output retains sourcing/sinking capability across its full operating range (1.2–5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00–3.15 V (–40 °C to +85 °C); ensures reliable MCU reset during 3.0 V rail brownout |
| Reset Pulse Width | 140–280 ms; guarantees sufficient hold time for full microcontroller initialization |
| Supply Current | 6 µA (typ) at VCC < 3.6 V; enables ultra-low-power operation in battery-backed systems |
| VCC Operating Range | 1.2–5.5 V; supports wide-input designs including 1.8 V logic domains with external level shifting |
| Output Type | Active-high push-pull RST; eliminates need for external pull-up resistor in most MCU interfaces |
| Temperature Range | –40 °C to +85 °C; qualified for industrial ambient environments without derating |
| Package | SOT23-3 (WX code); surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-3 package: 3-pin, lead-free, small-outline transistor outline with gull-wing leads; 2.8 mm × 2.1 mm body size, 0.95 mm height, 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Supply input | Power rail connection; monitored for threshold violation; must be decoupled with ≥0.1 µF capacitor |
| 2: GND | Ground reference | Return path for internal comparator and output driver; requires low-impedance PCB connection |
| 3: RST | Active-high reset output | Push-pull CMOS output; drives MCU reset pin directly; sinks 1.2 mA / sources 500 µA minimum |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Factory-trimmed ±0.03 V at 25 °C; maintains ±0.15 V over full temperature range for stable reset point |
| Low 6 µA quiescent current | Enables use in always-on subsystems without measurable impact on battery life or standby power budget |
| Valid RST down to VCC = 1.0 V | Ensures deterministic reset behavior during deep brownout, preventing MCU latch-up or undefined state |
| 140 ms minimum reset pulse | Exceeds typical ARM Cortex-M and 8-bit MCU power-on reset timing requirements without external timing components |
| Immunity to 20 µs/100 mV transients | Rejects common power rail noise without false triggering, reducing need for additional filtering |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
Use Scenario: Power-up sequencing and brownout recovery in DIN-rail mounted programmable logic controller modules. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RST until 3.0 V rail stabilizes above 3.00 V for ≥140 ms. Use Value: Prevents firmware execution before ADC references and communication peripherals are fully powered and calibrated. |
Use Scenario: Reliable reset generation during battery-switchover and grid voltage sags in Class 0.5S electricity meters. IC Role / Device Role / Timing Role: Monitors 3.0 V backup rail; holds MCU in reset during <100 ms dips below 3.00 V. Use Value: Eliminates meter data corruption or EEPROM write errors caused by premature MCU wake-up. |
| Medical Diagnostic Handheld | Building Automation Controller |
Use Scenario: Cold-start reliability in portable ultrasound or glucose analyzers using single-cell Li-ion supplies. IC Role / Device Role / Timing Role: Ensures clean reset when VCC rises from 2.8 V (discharged battery) through 3.08 V threshold. Use Value: Guarantees consistent boot behavior across battery charge cycles without software workarounds. |
Use Scenario: Supervision of 3.3 V system rail in HVAC controllers exposed to 12–24 V DC field wiring transients. IC Role / Device Role / Timing Role: Detects sustained undervoltage events on isolated 3.3 V domain fed from DC-DC converter. Use Value: Triggers controlled shutdown before sensor interface ICs enter metastable states or output invalid readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 3.08 V threshold, SOT23-3, but active-low RST output and 1.2 µA max ICC | Requires MCU reset pin configured for active-low assertion; lower current suits ultra-low-power sleep modes | Select if system design mandates active-low reset and sub-µA standby is critical |
| TPS3808G30DBVR | 3.0 V threshold, SOT23-6, adjustable delay (via capacitor), 1.8 µA ICC, active-high RST | Supports programmable reset timeout (up to 2 s); larger package adds routing flexibility but occupies more board area | Select if variable reset duration is needed beyond fixed 140–280 ms window |
Compared with STM810TWX6F, MAX809TRD3-T offers lower current but requires active-low MCU interface, while TPS3808G30DBVR adds delay configurability at the cost of pin count and footprint - neither matches STM810TWX6F's combination of fixed industrial-timed active-high reset in minimal SOT23-3.
Availability
STM810TWX6F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, medical diagnostic handhelds, and building automation controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM810TWX6F 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 STM8xx series is ST's dedicated family of low-power, precision voltage supervisors targeting robust power-on reset and brownout detection in resource-constrained embedded systems.
FAQ
Does STM810TWX6F support manual reset via an external push-button?
No. STM810TWX6F lacks a manual reset (MR) input pin - that feature is exclusive to STM811 and STM812 variants in the same family. This part relies solely on VCC monitoring for reset assertion. If hardware-initiated reset is required, an external circuit (e.g., RC debounced switch to MCU GPIO) must be implemented separately.
What is the minimum VCC required for valid RST output functionality?
The RST output remains fully functional - both sourcing and sinking specified current - down to VCC = 1.0 V across the full industrial temperature range (–40 °C to +85 °C). Below 1.0 V, the output enters high-impedance state; a 100 kΩ pull-up to VCC is recommended only if RST validity is required below this threshold.
Can STM810TWX6F be used with a 3.3 V supply rail?
Yes. Its 3.00–3.15 V reset threshold is intentionally set below 3.3 V to provide margin against rail droop during load transients. The device operates correctly across VCC = 1.2–5.5 V, and its RST output is compatible with standard 3.3 V CMOS logic levels (VOH ≥ 0.8×VCC, VOL ≤ 0.3 V at IOL = 1.2 mA).
How does STM810TWX6F handle short VCC voltage glitches?
It rejects negative-going transients ≤20 µs in duration when amplitude is ≤100 mV below the reset threshold (e.g., 3.08 V → 2.98 V), per Figure 12 in the datasheet. This immunity is achieved via internal debounce and comparator hysteresis, eliminating need for external filtering in typical industrial noise environments.
STM810TWX6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
STM810TWX6F FAQ
1.How can I place an order for STM810TWX6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM810TWX6F 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 STM810TWX6F reliable?
The price and inventory of STM810TWX6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM810TWX6F is usually 5 days.
3.What payment methods are accepted for STM810TWX6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM810TWX6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM810TWX6F?
STM810TWX6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM810TWX6F 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 STM810TWX6F?
For technical support, including STM810TWX6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM810TWX6F requirements.
6.How does Aetrix verify that STM810TWX6F is sourced from the original manufacturer or authorized distributors?
All STM810TWX6F 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 STM810TWX6F meets industry standards.
7.What is the process for return or replacement of STM810TWX6F?
All STM810TWX6F units undergo pre-shipment inspection (PSI). If there is an issue with STM810TWX6F, 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 STM810TWX6F part is unused and in its original packaging.
Return procedure for STM810TWX6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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