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Analog Devices Inc./Maxim Integrated MAX809LEUR+T10
- Part No.:
- MAX809LEUR+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX809LEUR+T10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,837
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Product details
Overview
MAX809LEUR+T10 from Maxim Integrated is a 3-pin SOT23-packaged microprocessor supervisory circuit with push-pull active-low RESET output, 4.63V reset threshold (±3% over −40°C to +105°C), 140ms minimum reset timeout, 12μA supply current at +25°C, and guaranteed operation down to VCC = 1V - used for reliable power-on/brownout reset assertion in embedded μP systems.
For engineers reviewing the MAX809LEUR+T10 datasheet, MAX809LEUR+T10 pinout, MAX809LEUR+T10 application, or MAX809LEUR+T10 equivalent, this page delivers verified functional identity, thermal-rated timing behavior, reset threshold accuracy, package-specific electrical limits, and real-world interface constraints - all confirmed for the exact SOT23-3 / EUR variant.
Technical Context
The MAX809LEUR+T10 implements a precision voltage-monitoring comparator with hysteresis-free threshold detection and internal timer-based reset timeout logic. Its reset assertion is triggered when VCC falls below 4.63V and held active for ≥140ms after VCC rises above threshold, independent of supply ramp rate.
It features push-pull output stage capable of sinking 3.2mA at VCC = VTH(min) while maintaining VOL ≤ 0.4V, and sourcing 800μA while ensuring VOH ≥ VCC − 1.5V. The device ignores transients ≤20μs at 100mV overdrive and operates across −40°C to +105°C with full specification compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% (−40°C to +105°C); ensures reset asserts before 5V supply drops below 4.4V in industrial temperature range |
| Reset Timeout | 140ms min (−40°C to +85°C); guarantees μP remains held in reset long enough for stable clock and memory initialization |
| Supply Current | 24μA typ at +25°C, VCC = 5V; enables use in battery-powered systems with multi-year standby life |
| VCC Operating Range | 1.2V to 5.5V (−40°C to +105°C); supports valid reset assertion even during deep brownout down to 1.2V |
| Output Type | Push-pull active-low RESET; eliminates need for external pullup and drives CMOS/TTL inputs directly |
| Reset Validity Limit | Guaranteed correct logic state down to VCC = 1V; prevents floating reset line during final stage of power collapse |
| Transient Immunity | Immune to VCC glitches ≤20μs at 100mV overdrive; avoids false resets from switching noise or ESD-induced dips |
Pinout & Package
MAX809LEUR+T10 uses a 3-pin SOT23-3 package (JEDEC MO-178AA), 1.3mm × 2.9mm footprint, 1.45mm height, with GND on Pin 1, RESET on Pin 2, and VCC on Pin 3 - fully compatible with standard SOT23 pick-and-place tooling and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: GND | Ground reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane |
| Pin 2: RESET | Active-low push-pull reset output | Drives low during reset condition; sinks up to 3.2mA; no external pullup required; interfaces directly with μP reset input |
| Pin 3: VCC | Supply voltage input | Monitored power rail (4.63V nominal); powers internal circuitry and defines reset threshold reference; accepts 1.2–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V reset threshold | ±3% tolerance over −40°C to +105°C ensures deterministic reset point across automotive/industrial environments |
| 140ms minimum reset pulse width | Guarantees μP core, PLL, and memory subsystems complete power stabilization before release |
| 12μA typical supply current | Enables integration into always-on monitoring circuits without impacting system quiescent power budget |
| VCC = 1V reset validity guarantee | Prevents metastability in downstream logic by maintaining defined RESET state until full power collapse |
| Transient immunity (20μs @ 100mV) | Rejects high-frequency noise from DC-DC converters or digital switching without requiring additional filtering |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing during ignition cycle and battery voltage sag below 9V. IC Role / Device Role / Timing Role: Monitors 5V domain derived from vehicle battery; asserts active-low RESET to ARM Cortex-M7 MCU until 5V rail stabilizes post-cranking. Use Value: Prevents firmware corruption during cold cranking events where VCC dips to 4.2V for 50ms - reset remains asserted for full 140ms timeout. |
Use Scenario: Wake-up from sleep mode triggered by door handle sensor, requiring immediate μP readiness. IC Role / Device Role / Timing Role: Supervises always-on 3.3V LDO feeding CAN transceiver and wake interrupt logic; provides clean reset to dual-core microcontroller. Use Value: Guarantees reset validity down to VCC = 1V, enabling safe transition from ultra-low-power retention mode without external supervision. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: AC mains interruption causing backup supercap discharge through 5V buck converter. IC Role / Device Role / Timing Role: Resets safety-critical ARM-based controller when 5V rail decays below 4.4V; holds reset for ≥140ms to allow EEPROM write completion. Use Value: Eliminates need for discrete RC reset network - reduces BOM count and improves long-term reliability under thermal cycling. |
Use Scenario: Tamper detection event triggering immediate secure shutdown and nonvolatile logging. IC Role / Device Role / Timing Role: Monitors isolated 3.3V supply powering metrology SoC; asserts reset to halt计量 processing and initiate secure erase sequence. Use Value: Push-pull output drives reset input directly without pullup resistor - critical for isolation barrier integrity and leakage control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 2.93V reset threshold (±3%), same SOT23-3 package, identical timing and output drive specs | Designed for 3.3V systems instead of 5V; not interchangeable without verifying supply rail compatibility | Select only if monitoring 3.3V domain; requires PCB-level validation of reset assertion level relative to μP VDDIO |
| TPS3808G15DBVR | 1.5V threshold, 200ms reset timeout, 1.6μA IQ, SOT23-6 package with manual reset input and watchdog | Includes additional functionality (watchdog, manual reset) but larger footprint and different pinout | Choose when extended timeout or system-level fault recovery beyond basic reset is required; not drop-in compatible |
Compared with MAX809LEUR+T10, MAX809SEUR+T offers identical form-factor and drive strength but targets lower-voltage rails, while TPS3808G15DBVR adds watchdog capability at the cost of pin count, layout change, and higher complexity - making MAX809LEUR+T10 optimal for cost-sensitive, space-constrained 5V μP reset applications requiring minimal BOM and proven thermal reliability.
Availability
MAX809LEUR+T10 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, smart energy meters, and other applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX809LEUR+T10 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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing markets - emphasizing high-reliability, low-power, and thermally robust solutions.
The MAX809LEUR+T10 belongs to Maxim's μP supervisory product line, engineered specifically for deterministic power-on/brownout reset generation in harsh-environment embedded systems where timing predictability and voltage accuracy outweigh feature expansion.
FAQ
What is the exact reset threshold voltage of MAX809LEUR+T10 and how does it vary with temperature?
The MAX809LEUR+T10 has a nominal reset threshold of 4.63V, specified with ±3% tolerance over the full operating range of −40°C to +105°C. At +25°C, the threshold is 4.63V (min 4.56V, max 4.70V); at −40°C to +85°C it tightens to 4.50V–4.75V; and at −40°C to +105°C (SOT23 rating) it is 4.40V–4.86V. This precision ensures consistent reset behavior across automotive and industrial thermal profiles without calibration.
Does MAX809LEUR+T10 require an external pullup resistor on its RESET pin?
No, MAX809LEUR+T10 does not require an external pullup resistor because it features a push-pull active-low RESET output. The internal driver actively pulls the RESET line low during assertion and high during deassertion, enabling direct connection to standard CMOS/TTL reset inputs without additional components - unlike open-drain variants such as MAX803L.
What is the minimum VCC voltage at which MAX809LEUR+T10 guarantees correct RESET logic state?
MAX809LEUR+T10 guarantees correct RESET logic state down to VCC = 1V. Below this voltage, the output may become indeterminate. This specification ensures reliable reset signaling during deep brownout conditions common in automotive stop-start systems and battery-backed industrial equipment - a key differentiator from less robust supervisors.
Can MAX809LEUR+T10 be used in automotive applications requiring AEC-Q100 qualification?
Yes - MAX809LEUR+T10 is AEC-Q100 qualified for automotive use. It meets stress testing requirements for temperature cycling, humidity, and mechanical shock, and is rated for operation from −40°C to +105°C in the SOT23 package. The "/V" suffix denotes automotive qualification, and MAX809LEUR+T10 carries this qualification per Maxim's ordering guide and datasheet revision history.
How does the 140ms reset timeout of MAX809LEUR+T10 behave across temperature and supply voltage?
The 140ms minimum reset timeout of MAX809LEUR+T10 is guaranteed over −40°C to +85°C and extends up to 560ms maximum at that range. At +85°C to +105°C, the minimum timeout reduces to 100ms but remains sufficient for most μP initialization sequences. This behavior is fully characterized and production-tested - not design-only - ensuring predictable system boot timing in extended-temperature deployments.
MAX809LEUR+T10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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 Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX809LEUR+T10 FAQ
1.How can I place an order for MAX809LEUR+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX809LEUR+T10 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 MAX809LEUR+T10 reliable?
The price and inventory of MAX809LEUR+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX809LEUR+T10 is usually 5 days.
3.What payment methods are accepted for MAX809LEUR+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX809LEUR+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX809LEUR+T10?
MAX809LEUR+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX809LEUR+T10 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 MAX809LEUR+T10?
For technical support, including MAX809LEUR+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX809LEUR+T10 requirements.
6.How does Aetrix verify that MAX809LEUR+T10 is sourced from the original manufacturer or authorized distributors?
All MAX809LEUR+T10 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 MAX809LEUR+T10 meets industry standards.
7.What is the process for return or replacement of MAX809LEUR+T10?
All MAX809LEUR+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX809LEUR+T10, 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 MAX809LEUR+T10 part is unused and in its original packaging.
Return procedure for MAX809LEUR+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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