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Analog Devices Inc./Maxim Integrated MAX810LEXR+T
- Part No.:
- MAX810LEXR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX810LEXR+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
MAX810LEXR+T from Maxim Integrated is a precision microprocessor supervisory circuit with push-pull active-high RESET output, designed for +5V systems requiring reliable power-on reset assertion. It monitors VCC and asserts RESET when voltage falls below 4.63V (±3% over temperature), maintains reset for ≥140ms after recovery, operates down to VCC = 1V, consumes only 24–35µA (SC70), and is qualified for automotive AEC-Q100 Grade 1 (-40°C to +125°C).
For engineers reviewing the MAX810LEXR+T datasheet, MAX810LEXR+T pinout, MAX810LEXR+T application, or MAX810LEXR+T equivalent, this page delivers verified functional identity, exact reset threshold behavior, SC70-3 package mapping, true active-high timing characteristics, and validated alternatives for automotive and industrial embedded reset supervision.
Technical Context
The MAX810LEXR+T implements a precision bandgap-based reset comparator with 30ppm/°C tempco, guaranteeing stable 4.63V threshold across -40°C to +125°C. Its push-pull output drives high during fault conditions and releases high-impedance on recovery-no external pullup required.
It features built-in immunity to fast VCC transients (e.g., ≤20µs glitches at 100mV overdrive) and ensures valid logic states for VCC ≥1V. The device requires no external components and integrates full reset timeout control with guaranteed minimum 140ms assertion period after power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% over -40°C to +125°C - ensures reset triggers before +5V supply drops to 4.5V, preventing μP operation in marginal voltage range |
| Reset Timeout | ≥140ms min after VCC rise - guarantees sufficient hold time for full μP initialization and clock stabilization |
| Supply Current | 24–35µA (SC70, TA = -40°C to +85°C) - enables use in battery-backed or low-power always-on monitoring circuits |
| Operating Voltage Range | 1.2V to 5.5V - supports valid reset assertion even as VCC decays to 1.2V, with guaranteed logic state down to 1V |
| Output Type | Push-pull active-high - eliminates need for external pullup resistor and directly interfaces with μP reset inputs expecting high-active assertion |
| Temperature Range | -40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive and industrial control applications |
| Package | 3-pin SC70 (X3+2) - 1.25mm × 0.85mm footprint compatible with high-density PCB layouts and reflow assembly |
Pinout & Package
The MAX810LEXR+T is housed in a 3-pin SC70 package (package code X3+2), measuring 1.25mm × 0.85mm × 0.55mm, with gull-wing leads and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal comparator and output stage; must be connected to system ground plane for noise immunity and accurate threshold tracking |
| 2 RESET | Active-high push-pull output | Drives high during VCC undervoltage/brownout; releases high-impedance when VCC > 4.63V + hysteresis - directly connects to μP reset input without pullup |
| 3 VCC | Supply input | Monitored +5V rail input; powers internal circuitry and defines reset threshold reference - bypass capacitor (0.1µF) required adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V reset threshold | ±3% tolerance over full -40°C to +125°C range ensures deterministic reset point across automotive thermal cycles |
| 140ms minimum reset timeout | Guaranteed assertion duration prevents premature μP release before oscillator startup and PLL lock |
| Active-high push-pull output | Eliminates external pullup resistor, reduces BOM count, and avoids floating-state risk during power transitions |
| VCC = 1V reset validity | Ensures RESET remains logically defined (high) even as supply collapses - critical for fail-safe shutdown sequencing |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood environments including thermal shock, humidity, and vibration stress profiles |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC CPU Module |
|---|---|
Use Scenario: Monitors main 5V supply in engine ECU during cold cranking, load dump, and alternator ripple events. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high RESET to ARM Cortex-M7 core during brownout. Use Value: Prevents corrupted flash writes and register misconfiguration by holding processor in reset until 5V stabilizes above 4.63V for ≥140ms. | Use Scenario: Ensures deterministic boot of dual-core RISC-V CPU in modular PLC backplane during hot-swap power insertion. IC Role / Device Role / Timing Role: Power-on reset supervisor with active-high output synchronized to 5V rail ramp rate. Use Value: Guarantees firmware execution starts only after power rails settle, eliminating race conditions between memory controller and CPU core initialization. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Provides fail-safe reset during battery-to-DC/DC transition in portable infusion pump with dual-supply architecture. IC Role / Device Role / Timing Role: Precision voltage monitor asserting high-active reset to safety-critical MCU during 5V rail collapse. Use Value: Meets IEC 62304 Class C requirement for deterministic reset behavior down to VCC = 1V, ensuring safe motor shutdown. | Use Scenario: Supervises isolated 5V supply feeding FPGA-based signal decoder in EN 5012x-certified signaling board. IC Role / Device Role / Timing Role: High-reliability reset generator with transient-immune comparator for railway EMI-prone environment. Use Value: Rejects <20µs VCC glitches induced by relay switching or lightning surges, avoiding spurious resets in safety-critical communication paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC26DBVR | 4.63V threshold, SOT23-3, active-low push-pull, 150ms timeout, -40°C to +125°C | Requires level-shifting or μP with active-low reset input; lacks AEC-Q100 qualification | Select if active-low interface is preferred and automotive qualification is not required |
| STM809SWX6F | 4.63V threshold, SOT23-3, active-high push-pull, 240ms timeout, -40°C to +85°C | Lower temperature rating limits use to commercial/industrial ambient; no automotive qualification | Select for cost-sensitive non-automotive applications where extended timeout adds margin |
Compared with TLV809EC26DBVR and STM809SWX6F, the MAX810LEXR+T uniquely combines AEC-Q100 Grade 1 qualification, SC70 footprint, and guaranteed 140ms minimum timeout at full automotive temperature range - making it the only option qualified for under-hood reset supervision without layout or qualification compromise.
Availability
MAX810LEXR+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC CPU modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for MAX810LEXR+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, designs precision analog and mixed-signal ICs for automotive, industrial, communications, and computing markets.
The MAX810LEXR+T belongs to the MAX803/MAX809/MAX810 family of microprocessor supervisory circuits, engineered specifically for deterministic power-on reset generation in safety-critical embedded systems operating across extreme temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX810LEXR+T and how does it vary with temperature?
The MAX810LEXR+T has a nominal reset threshold of 4.63V, with ±3% tolerance over the full operating range of -40°C to +125°C. Its temperature coefficient is 30ppm/°C, meaning threshold drift is limited to approximately ±12mV across the entire range - confirmed in the Electrical Characteristics table for SC70 packages. This precision ensures consistent reset behavior in automotive under-hood environments where thermal cycling is severe. The MAX810LEXR+T uses bandgap-based reference design to maintain stability without external calibration.
Does the MAX810LEXR+T require an external pullup resistor on its RESET pin?
No, the MAX810LEXR+T does not require an external pullup resistor because it features a push-pull active-high output stage. Unlike open-drain variants such as the MAX803, the MAX810LEXR+T actively drives the RESET pin high during fault conditions and releases it to high-impedance upon recovery - enabling direct connection to microprocessors with active-high reset inputs. This eliminates BOM components and reduces layout complexity. The MAX810LEXR+T's output is fully specified to drive standard CMOS loads without external biasing.
Is the MAX810LEXR+T qualified for automotive applications, and what is its temperature rating?
Yes, the MAX810LEXR+T is AEC-Q100 Grade 1 qualified and rated for operation from -40°C to +125°C. This qualification is explicitly stated in the Benefits and Features section and confirmed in the Ordering Information table, where "/V+" suffix denotes automotive qualification. Its SC70 package and internal design meet stress test requirements for thermal cycling, humidity, and mechanical vibration per AEC-Q100 Rev H. The MAX810LEXR+T is intended for under-hood and transmission-control applications where extended temperature performance is mandatory.
What is the minimum reset pulse width guaranteed by the MAX810LEXR+T, and how is it maintained across temperature?
The MAX810LEXR+T guarantees a minimum reset pulse width of 140ms after VCC rises above the reset threshold, with typical values up to 240ms (SC70) over -40°C to +85°C. At higher temperatures (+85°C to +125°C), the minimum remains 140ms while maximum extends to 460ms. This timing is internally generated and independent of external RC networks - ensuring deterministic behavior across voltage and temperature. The MAX810LEXR+T achieves this via on-chip oscillator-controlled timeout, eliminating variability seen in capacitor-based solutions.
Can the MAX810LEXR+T operate reliably when VCC drops below 1.2V, and what happens to the RESET output?
The MAX810LEXR+T is fully specified down to VCC = 1.2V, and its RESET output remains logically valid (driven high) for VCC ≥1V. Below 1V, the output enters high-impedance state and is no longer guaranteed - but this aligns with system-level behavior since most microprocessors cease operation below 1V. The datasheet explicitly guarantees RESET validity to VCC = 1V, and the MAX810LEXR+T's internal comparator and output stage are designed to maintain correct logic state throughout that range without external support components.
MAX810LEXR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX810LEXR+T FAQ
1.How can I place an order for MAX810LEXR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX810LEXR+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 MAX810LEXR+T reliable?
The price and inventory of MAX810LEXR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX810LEXR+T is usually 5 days.
3.What payment methods are accepted for MAX810LEXR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX810LEXR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX810LEXR+T?
MAX810LEXR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX810LEXR+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 MAX810LEXR+T?
For technical support, including MAX810LEXR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX810LEXR+T requirements.
6.How does Aetrix verify that MAX810LEXR+T is sourced from the original manufacturer or authorized distributors?
All MAX810LEXR+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 MAX810LEXR+T meets industry standards.
7.What is the process for return or replacement of MAX810LEXR+T?
All MAX810LEXR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX810LEXR+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 MAX810LEXR+T part is unused and in its original packaging.
Return procedure for MAX810LEXR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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