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onsemi MAX810STR
- Part No.:
- MAX810STR
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX810STR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,476
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Product details
Overview
MAX810STR from onsemi is a precision 3-pin microprocessor reset supervisor IC with active-high RESET output, 2.93 V reset threshold, 140–460 ms factory-trimmed timeout, SOT-23-3 package, and −40°C to +105°C operating range-designed for reliable power-on reset in battery-powered embedded systems.
For engineers reviewing the MAX810STR datasheet, pinout, applications, or equivalent options, key selection criteria include reset threshold accuracy (±2.5% over temperature), ultra-low 0.5 µA supply current at 3.3 V, guaranteed RESET validity down to VCC = 1.0 V, and immunity to fast VCC transients up to 100 mV/5 µs.
Technical Context
The MAX810STR integrates a precision voltage detector, oscillator-based timeout counter, and push-pull RESET driver in a single die. Its internal comparator continuously monitors VCC against a trimmed 2.93 V reference with ±30 ppm/°C temperature coefficient, ensuring stable trip point across industrial temperatures.
Upon VCC falling below 2.93 V, RESET asserts high within 10 µs; after VCC rises above threshold, the oscillator initiates a fixed 140–460 ms delay before deasserting RESET-guaranteed over full temperature and supply range without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% (−40°C to +105°C); ensures reliable detection of 3.3 V rail brownout without false triggers |
| Supply Current | 0.5 µA typical at VCC = 3.3 V; enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout | 140–460 ms factory-trimmed; meets JEDEC JESD78 latch-up immunity timing requirements for microcontrollers |
| RESET Output Type | Active-high push-pull; drives CMOS inputs directly without pull-up resistor, reducing BOM count |
| VCC Operating Range | 1.2 V to 5.5 V; supports legacy 5 V, modern 3.3 V, and low-power 1.8 V/1.2 V systems |
| Transient Immunity | Rejects ≤100 mV glitches lasting ≤5 µs; eliminates spurious resets during switching noise or hot-plug events |
| Operating Temperature | −40°C to +105°C; qualified for industrial control, automotive under-hood, and outdoor edge devices |
Pinout & Package
SOT-23-3 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, Pb-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for voltage detection and RESET driver; must be connected to system ground plane with low-inductance path |
| 2 | RESET | Active-high push-pull output; sinks 3.2 mA / sources 500 µA; valid down to VCC = 1.0 V |
| 3 | VCC | Power supply input; accepts 1.2–5.5 V; includes internal ESD protection and transient filtering circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93 V threshold | ±2.5% tolerance over −40°C to +105°C enables accurate 3.3 V rail monitoring without calibration |
| No external components required | Integrated detector, oscillator, and driver eliminate discrete resistors/capacitors-reducing PCB area by >2 mm² |
| Ultra-low 0.5 µA supply current | Extends battery life in always-on sensor nodes; draws less than 1% of typical MCU standby current |
| VCC transient immunity | Rejects 100 mV/5 µs glitches-prevents false resets during DC-DC converter switching or ESD events |
| Guaranteed RESET validity to 1.0 V | Ensures deterministic processor reset state during deep brownout; avoids floating I/O during final power collapse |
Applications
| Industrial PLC Controller | Medical Wearable Sensor |
|---|---|
|
Use Scenario: Power sequencing in DIN-rail mounted programmable logic controllers with dual 24 V/5 V rails. IC Role / Device Role / Timing Role: Monitors 5 V logic rail and asserts active-high RESET to ARM Cortex-M7 MCU during undervoltage events. Use Value: Prevents firmware corruption during factory floor voltage sags; 140–460 ms timeout aligns with IEC 61000-4-11 immunity test durations. |
Use Scenario: Battery-powered ECG patch with CR2032 coin cell and ultra-low-power BLE SoC. IC Role / Device Role / Timing Role: Detects 3.3 V LDO output drop below 2.93 V and holds BLE SoC in reset until stable power resumes. Use Value: 0.5 µA quiescent current extends 2-week battery life by >12%; SOT-23-3 footprint fits <8 mm² wearable PCB real estate. |
| Automotive Telematics Unit | Smart Home Gateway |
|
Use Scenario: LTE modem module in vehicle infotainment system subjected to cold-crank (4.5 V) and load-dump (36 V) transients. IC Role / Device Role / Timing Role: Supervises 3.3 V domain powering GPS/IMU subsystem; RESET output tied to modem's nRESET pin. Use Value: −40°C to +105°C rating matches AEC-Q100 Grade 2; 2.93 V threshold avoids false triggers during 12 V battery dips to 9 V. |
Use Scenario: Wi-Fi 6 gateway with dual-core application processor and multiple PMIC rails. IC Role / Device Role / Timing Role: Primary reset supervisor for 1.1 V core rail; provides clean power-on sequence before Linux boot begins. Use Value: Push-pull output eliminates need for external pull-up, reducing component count and improving signal integrity on noisy 2-layer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809STRG | Active-low RESET output; identical 2.93 V threshold and 140–460 ms timeout; same SOT-23-3 package | Requires inverted reset logic on host MCU; unsuitable for processors with dedicated active-high reset pins | Select MAX809STRG only when target MCU requires active-low reset assertion or existing board layout uses pull-down configuration |
| TPS3808G12DBVR | 2.93 V threshold, but adjustable timeout (1.25 ms–10 s via capacitor); higher 1.1 µA supply current; same SOT-23-6 package (pin-compatible with 3-pin variant) | Enables fine-tuned reset timing for custom boot sequences; larger footprint and higher quiescent current limit use in ultra-low-power designs | Choose TPS3808G12DBVR when variable timeout is needed for FPGA configuration or multi-stage power sequencing |
Compared with MAX810STR, MAX809STRG offers identical supervision accuracy and low power but requires MCU-level logic inversion, while TPS3808G12DBVR trades fixed timing simplicity for programmability and higher current draw-making MAX810STR optimal for cost-sensitive, space-constrained, and battery-critical applications.
Availability
MAX810STR is available at Aetrix Electronics and suitable for industrial PLC controllers, medical wearable sensors, automotive telematics units, and smart home gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX810STR 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The MAX810 series belongs to onsemi's precision system supervision product line, engineered specifically for robust, zero-component reset generation in battery-constrained and electrically noisy environments.
FAQ
What is the exact reset threshold voltage of the MAX810STR?
The MAX810STR has a factory-trimmed reset threshold of 2.93 V, specified with ±2.5% tolerance over the full −40°C to +105°C operating temperature range. This value is confirmed in the Electrical Characteristics table on page 4 of the datasheet under "MAX8xxSTR, MAX8xxSQ293" row, and applies directly to the MAX810STR part number.
Does the MAX810STR require any external components to function?
No, the MAX810STR operates autonomously with no external components required. Its internal voltage detector, oscillator, and push-pull RESET driver are fully integrated. The datasheet explicitly states "No external components are required" on page 1 and confirms this in the Applications Information section (page 9), where design examples show direct connection to VCC, GND, and RESET without resistors or capacitors.
What is the guaranteed RESET timeout duration for the MAX810STR?
The MAX810STR features a factory-trimmed reset timeout of 140–460 ms, as documented in the Ordering Information table on page 10. This range reflects process variation across production lots and is guaranteed over temperature and supply voltage-ensuring compliance with JEDEC JESD78 minimum reset pulse width requirements for microcontrollers.
Can the MAX810STR operate reliably at VCC = 1.2 V?
Yes, the MAX810STR supports VCC as low as 1.2 V, per the "VCC Range" specification on page 4 (Min = 1.2 V at −40°C to +105°C). Its RESET output remains valid down to VCC = 1.0 V, enabling safe shutdown sequencing in ultra-low-voltage systems such as sub-1.8 V IoT SoCs-confirmed in the Electrical Characteristics table and Figure 10.
Is the MAX810STR pin-compatible with other parts in the MAX809/810 family?
Yes, all MAX809/810 series devices-including MAX810STR-use identical SOT-23-3 pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. This is verified in the Pin Configuration diagram (page 1), Pin Description table (page 3), and Mechanical Case Outline (page 13), confirming mechanical and electrical compatibility across the family for drop-in replacement in existing layouts.
MAX810STR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MAX810STR FAQ
1.How can I place an order for MAX810STR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX810STR 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 MAX810STR reliable?
The price and inventory of MAX810STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX810STR is usually 5 days.
3.What payment methods are accepted for MAX810STR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX810STR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX810STR?
MAX810STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX810STR 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 MAX810STR?
For technical support, including MAX810STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX810STR requirements.
6.How does Aetrix verify that MAX810STR is sourced from the original manufacturer or authorized distributors?
All MAX810STR 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 MAX810STR meets industry standards.
7.What is the process for return or replacement of MAX810STR?
All MAX810STR units undergo pre-shipment inspection (PSI). If there is an issue with MAX810STR, 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 MAX810STR part is unused and in its original packaging.
Return procedure for MAX810STR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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