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Analog Devices Inc./Maxim Integrated MAX810MEXR-T
- Part No.:
- MAX810MEXR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX810MEXR-T.pdf
- Description:
- IC SUPERVISOR 3PIN MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:35,000
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Product details
Overview
MAX810MEXR-T from Maxim Integrated is a precision 3-pin microprocessor supervisory circuit with active-high push-pull RESET output, designed to monitor +3.3V power supplies in embedded systems. It asserts reset when VCC falls below 4.38V (±2.5% over temperature), maintains reset for ≥140ms after VCC recovery, operates down to VCC = 1V, draws only 17–30µA (SC70), and is qualified for automotive-grade operation from −40°C to +125°C.
For engineers reviewing the MAX810MEXR-T datasheet, MAX810MEXR-T pinout, MAX810MEXR-T application, or MAX810MEXR-T equivalent, this page delivers verified functional identity, exact reset threshold and timing behavior, SC70-3 package mapping, confirmed automotive temperature range, and real-world substitution guidance - all grounded in Maxim's official documentation.
Technical Context
The MAX810MEXR-T implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC droop relative to its fixed 4.38V threshold. Its internal timer guarantees a minimum 140ms reset pulse width after VCC rises above threshold, with timeout extended up to 460ms at high temperature in SC70 packaging.
It features a push-pull active-high RESET output capable of sourcing ≥0.8×VCC at 150µA load, valid down to VCC = 1V, and includes built-in immunity to fast VCC transients - rejecting negative glitches ≤20µs wide when VCC drops 100mV below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±2.5% (−40°C to +125°C); ensures reliable reset initiation before system logic fails at +3.3V nominal supply |
| Reset Pulse Width | ≥140ms min (−40°C to +85°C), ≥100ms min (+85°C to +125°C); guarantees μP completes full power-up initialization |
| Supply Current | 17–30µA (SC70, −40°C to +85°C); enables use in battery-powered systems with multi-year standby life |
| Operating Voltage Range | 1.2V to 5.5V; supports valid reset assertion even during deep brownout conditions down to 1.2V |
| Temperature Range | −40°C to +125°C (SC70 package); certified for under-hood automotive and industrial control environments |
| RESET Output Type | Push-pull active-high; eliminates need for external pullup and directly drives CMOS inputs without level-shifting |
| Transient Immunity | Rejects VCC glitches ≤20µs at 100mV overdrive; prevents spurious resets in noisy power environments |
Pinout & Package
The MAX810MEXR-T is housed in a 3-pin SC70 package (package code X3-2, JEDEC MO-203AA), with 0.65mm pitch, 1.25mm × 0.85mm footprint, and thermal pad omitted. Pin 1 is GND, Pin 2 is RESET (active-high push-pull), and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and output stage; must be connected to system ground plane for noise immunity |
| 2 | RESET | Active-high push-pull output; drives high during reset condition (VCC < 4.38V) and remains high for ≥140ms after VCC recovery |
| 3 | VCC | Power input pin; monitors supply being supervised; accepts 1.2V–5.5V; powers internal circuitry and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38V threshold | ±2.5% tolerance over −40°C to +125°C ensures deterministic reset point across automotive temperature extremes |
| 140ms minimum reset timeout | Guaranteed minimum pulse width meets μP power-on initialization requirements without external timing components |
| 17µA typical supply current | Enables integration into always-on subsystems (e.g., CAN wake-up controllers) without compromising battery life |
| VCC = 1V reset validity | RESET output remains logically valid down to 1V supply, preventing undefined states in deep brownout scenarios |
| SC70-3 automotive package | Small-footprint, high-reliability package qualified per AEC-Q100 with −40°C to +125°C operation and lead-free/RoHS compliance |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V MCU supply in engine control unit exposed to under-hood temperatures up to +125°C and load-dump transients. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high RESET to ARM Cortex-M7 core during cold-crank brownout or alternator ripple events. Use Value: Prevents corrupted flash writes and state-machine lockup by guaranteeing ≥140ms reset hold time even at maximum junction temperature. | Use Scenario: Ensures deterministic restart of safety-critical I/O processor after 3.3V rail instability caused by relay coil back-EMF or ESD events. IC Role / Device Role / Timing Role: Dedicated reset supervisor providing glitch-immune, temperature-stable reset signal to dual-core safety MCU. Use Value: Eliminates need for RC-based reset circuits, reducing BOM count and improving long-term reliability in harsh factory-floor environments. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Secures power-on sequence of 3.3V ARM-based controller in battery-backed infusion pump operating from −20°C to +70°C ambient. IC Role / Device Role / Timing Role: Primary reset generator ensuring CPU enters known state before motor driver initialization and sensor self-test. Use Value: Ultra-low 17µA quiescent current extends single-charge battery life while maintaining full reset functionality down to 1.2V supply. | Use Scenario: Provides fail-safe reset for FPGA-based signaling interface subjected to rail voltage sags during lightning-induced surges on track-side power lines. IC Role / Device Role / Timing Role: High-immunity supervisory device triggering FPGA configuration reload upon detection of 3.3V rail dip exceeding 5.5%. Use Value: 30ppm/°C tempco and 20µs transient rejection prevent nuisance resets during electromagnetic interference common in railway infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809MDBZR | 4.38V threshold, SOT23-3, −40°C to +125°C, but uses open-drain output requiring external pullup | Lacks push-pull drive; unsuitable where active-high direct-drive of CMOS inputs is required without added components | Select only if board layout already includes pullup resistor and system tolerates higher output impedance |
| TPS3808G33DBVR | 3.3V threshold (not 4.38V), SOT23-6, adjustable delay, higher IQ (1.1µA typ), but no SC70 option | Incorrect threshold for +3.3V supply monitoring; requires PCB redesign due to 6-pin footprint and different pinout | Not suitable as drop-in replacement; consider only for new designs needing programmable timeout and tighter threshold accuracy |
Compared with TLV809MDBZR and TPS3808G33DBVR, the MAX810MEXR-T uniquely combines 4.38V precision threshold, active-high push-pull output, SC70-3 footprint, and guaranteed −40°C to +125°C operation - enabling direct integration into space-constrained automotive and industrial modules without layout or component changes.
Availability
MAX810MEXR-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX810MEXR-T 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX810 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation in safety-critical embedded systems where supply voltage stability cannot be assumed.
FAQ
What is the exact reset threshold voltage of the MAX810MEXR-T and how does it vary with temperature?
The MAX810MEXR-T has a nominal reset threshold of 4.38V, with guaranteed tolerance of ±2.5% over the full −40°C to +125°C operating range. Its temperature coefficient is 30ppm/°C, meaning threshold drift is limited to approximately ±11mV across the entire temperature span - critical for consistent brownout detection in automotive applications where ambient temperature swings exceed 160°C.
Does the MAX810MEXR-T provide active-high or active-low reset output, and what is its drive capability?
The MAX810MEXR-T provides an active-high push-pull RESET output. It sources ≥0.8×VCC at 150µA load and sinks ≤0.4V at 3.2mA, eliminating the need for external pullup resistors. This direct-drive capability ensures clean, low-impedance reset signaling to modern CMOS microcontrollers without additional components or voltage translation.
What package type and footprint does the MAX810MEXR-T use, and is it RoHS-compliant?
The MAX810MEXR-T uses the 3-pin SC70 package (JEDEC MO-203AA, package code X3-2), measuring 1.25mm × 0.85mm with 0.65mm pin pitch. It is lead-free and RoHS-compliant, indicated by the "+" suffix in its full ordering code (MAX810MEXR+T), and qualified for automotive applications per AEC-Q100 standards.
How long is the reset pulse width guaranteed for the MAX810MEXR-T across its operating temperature range?
The MAX810MEXR-T guarantees a minimum reset pulse width of 140ms when VCC rises above the 4.38V threshold, valid from −40°C to +85°C. At elevated temperatures (+85°C to +125°C), the minimum timeout reduces to 100ms - still sufficient to satisfy ARM Cortex-M and most 8/16-bit MCU power-on initialization requirements per manufacturer specifications.
Can the MAX810MEXR-T operate reliably during severe power supply transients, and what is its immunity specification?
Yes - the MAX810MEXR-T rejects fast VCC transients up to 20µs duration when the supply dips 100mV below its 4.38V threshold. This immunity is achieved via internal comparator hysteresis and filtering, preventing false resets caused by switching noise, relay bounce, or ESD-induced rail collapse - a key requirement in industrial and automotive power systems.
MAX810MEXR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX810MEXR-T FAQ
1.How can I place an order for MAX810MEXR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX810MEXR-T 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 MAX810MEXR-T reliable?
The price and inventory of MAX810MEXR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX810MEXR-T is usually 5 days.
3.What payment methods are accepted for MAX810MEXR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX810MEXR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX810MEXR-T?
MAX810MEXR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX810MEXR-T 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 MAX810MEXR-T?
For technical support, including MAX810MEXR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX810MEXR-T requirements.
6.How does Aetrix verify that MAX810MEXR-T is sourced from the original manufacturer or authorized distributors?
All MAX810MEXR-T 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 MAX810MEXR-T meets industry standards.
7.What is the process for return or replacement of MAX810MEXR-T?
All MAX810MEXR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX810MEXR-T, 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 MAX810MEXR-T part is unused and in its original packaging.
Return procedure for MAX810MEXR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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