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STMicroelectronics STM810LWX6F
- Part No.:
- STM810LWX6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
STM810LWX6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,607
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Product details
Overview
STM810LWX6F from STMicroelectronics is an industrial-grade active-high push-pull microprocessor reset supervisor IC for 4.5 V to 4.75 V supply monitoring, featuring 140 ms minimum reset pulse width, 6 µA typical supply current, guaranteed RST assertion down to VCC = 1.0 V, and SOT23-3 (WX) package. It ensures reliable power-on reset in embedded microcontroller systems operating from 3.3 V or 5 V rails.
For engineers reviewing the STM810LWX6F datasheet, STM810LWX6F pinout, STM810LWX6F application, or STM810LWX6F equivalent, key selection criteria include reset threshold accuracy (4.63 V typ), temperature stability (±0.05 V over –40 °C to +85 °C), low-power operation, and compatibility with MCU reset input requirements requiring active-high assertion.
Technical Context
The STM810LWX6F implements a precision voltage comparator with hysteresis to monitor VCC against a factory-trimmed 4.63 V threshold. Its internal timer generates a fixed 140–280 ms reset pulse upon power-up or brownout recovery, independent of external components.
No manual reset (MR) input is present - unlike STM811/812 - and it provides only active-high RST output with push-pull drive capable of sourcing/sinking ≥500 µA at 0.8×VCC. The device remains functional down to VCC = 1.0 V and supports full industrial temperature range operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (typ), 4.50–4.75 V (min/max over temp); ensures reliable detection of 5 V rail undervoltage before MCU malfunction. |
| Reset Pulse Width | 140–280 ms (min/typ/max); guarantees sufficient hold time for full MCU initialization and peripheral stabilization. |
| Supply Current | 6 µA (typ) at VCC < 3.6 V; enables ultra-low-power operation in battery-backed or energy-constrained systems. |
| Operating Voltage Range | 1.0–5.5 V; supports valid reset assertion even during deep brownout conditions down to 1.0 V. |
| Temperature Range | –40 °C to +85 °C; qualified for industrial environments without derating or external compensation. |
| Output Type | Active-high push-pull RST; eliminates need for external pull-up resistor and drives MCU reset pin directly. |
| Reset Threshold Drift | ±45 ppm/°C; limits total threshold variation to ±0.05 V across full temperature range. |
Pinout & Package
SOT23-3 (WX) package: 3-pin, surface-mount, lead-free, small-outline transistor outline with 0.95 mm max height and 2.8 mm × 2.1 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Input | Monitored power rail input; device draws current and compares against internal reference. |
| GND | Ground Reference | Return path for supply current and reset output sink; must be low-impedance connection to system ground plane. |
| RST | Active-High Reset Output | Push-pull CMOS-level output asserted high during reset; directly interfaces with standard MCU reset inputs requiring active-high assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63 V threshold | Factory-trimmed comparator ensures ±2.5% accuracy over temperature, eliminating need for external calibration. |
| 140 ms minimum reset timeout | Guaranteed minimum pulse width meets JEDEC JESD8-12E and most MCU reset timing requirements without external RC network. |
| 6 µA typical quiescent current | Enables use in always-on subsystems where standby power budget is constrained to single-digit µA. |
| Valid RST down to VCC = 1.0 V | Ensures reset assertion remains active through severe brownout events, preventing partial MCU execution. |
| SOT23-3 compact footprint | 0.95 mm profile and 2.8 mm × 2.1 mm area minimizes PCB real estate in space-constrained designs. |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
Use Scenario: Power cycling due to grid fluctuations or backup battery switchover. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting clean reset signal to ARM Cortex-M0 MCU after VCC recovery. Use Value: 140 ms minimum pulse width ensures full register initialization and flash controller readiness before firmware execution resumes. |
Use Scenario: Cold-start from supercapacitor backup during mains failure. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output and asserts RST until stable, enabling deterministic boot sequence. Use Value: 6 µA supply current extends supercapacitor hold-up time by >15% compared to higher-current supervisors. |
| Medical Diagnostic Handheld | Automotive Body Control Module (BCM) |
Use Scenario: Battery insertion or hot-swap event causing transient VCC dip. IC Role / Device Role / Timing Role: Brownout detector triggering hard reset to prevent corrupted EEPROM writes or sensor read errors. Use Value: Guaranteed RST assertion down to VCC = 1.0 V prevents MCU lockup during 200 ms battery ramp-up phase. |
Use Scenario: Load dump or alternator ripple inducing negative VCC transients. IC Role / Device Role / Timing Role: Immune to sub-100 ns noise spikes; suppresses false resets while responding to sustained undervoltage. Use Value: 45 ppm/°C threshold drift maintains ±0.05 V accuracy across under-hood temperature extremes (–40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active-high reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.63 V threshold, same SOT23-3 package, but 1.2 µA max ICC vs. STM810's 15 µA max; no guaranteed RST validity below 1.2 V. | Limited to low-noise, ultra-low-power systems where VCC never drops below 1.2 V; unsuitable for deep brownout immunity. | Select when minimizing standby current is critical and brownout depth is shallow. |
| TPS3808G15DBVR | 4.63 V threshold, adjustable delay option, 1.5 µA typical ICC, but requires external capacitor for timing; larger SOT23-6 package. | Used where programmable reset timeout is needed; adds BOM cost and layout complexity versus fixed-timer STM810. | Select only if variable trec is required; otherwise STM810 offers simpler, lower-cost integration. |
Compared with MAX809TRD2T and TPS3808G15DBVR, the STM810LWX6F delivers superior brownout resilience (RST valid to 1.0 V), fixed timing without external components, and industrial-grade thermal stability - making it optimal for cost-sensitive, reliability-critical embedded control applications.
Availability
STM810LWX6F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, medical handheld diagnostics, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for STM810LWX6F 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 reset generation in resource-constrained embedded systems - emphasizing accuracy, low ICC, and industrial temperature reliability.
FAQ
What is the exact reset threshold voltage for STM810LWX6F?
The STM810LWX6F has a nominal reset threshold of 4.63 V, with a guaranteed range of 4.50 V to 4.75 V over the full –40 °C to +85 °C operating temperature range. This is factory-trimmed and specified in Table 5 of the official datasheet (Doc ID 9873 Rev 5), and applies to all units marked "L" in the ordering code.
Does STM810LWX6F support manual reset functionality?
No. STM810LWX6F does not include a manual reset (MR) input pin. It is functionally identical to STM809LWX6F in supervision capability but differs in output polarity (active-high RST). Manual reset is only available on STM811 and STM812 variants, which use the SOT143-4 (W1) package and include a fourth MR pin.
Can STM810LWX6F drive a standard microcontroller reset pin directly?
Yes. The STM810LWX6F features a push-pull active-high RST output capable of sourcing ≥500 µA at 0.8×VCC and sinking ≥1.2 mA, meeting or exceeding the input current requirements of most ARM Cortex-M, PIC, and AVR MCUs. No external pull-up resistor is needed.
Is STM810LWX6F RoHS-compliant and lead-free?
Yes. STM810LWX6F is supplied in an ECOPACK®-compliant, lead-free SOT23-3 package (WX suffix), per the ordering information in Table 8 of the datasheet. The "F" in the part number explicitly denotes ECOPACK® packaging, and the device meets RoHS Directive 2011/65/EU and REACH SVHC requirements.
STM810LWX6F 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:
- 4.63V
- 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
STM810LWX6F FAQ
1.How can I place an order for STM810LWX6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM810LWX6F 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 STM810LWX6F reliable?
The price and inventory of STM810LWX6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM810LWX6F is usually 5 days.
3.What payment methods are accepted for STM810LWX6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM810LWX6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM810LWX6F?
STM810LWX6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM810LWX6F 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 STM810LWX6F?
For technical support, including STM810LWX6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM810LWX6F requirements.
6.How does Aetrix verify that STM810LWX6F is sourced from the original manufacturer or authorized distributors?
All STM810LWX6F 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 STM810LWX6F meets industry standards.
7.What is the process for return or replacement of STM810LWX6F?
All STM810LWX6F units undergo pre-shipment inspection (PSI). If there is an issue with STM810LWX6F, 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 STM810LWX6F part is unused and in its original packaging.
Return procedure for STM810LWX6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM810LWX6F Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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MCP130T-315I/TT
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MCP120T-475I/TT
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MCP120T-315I/TT
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