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Analog Devices Inc./Maxim Integrated MAX810REXR
- Part No.:
- MAX810REXR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX810REXR.pdf
- Description:
- IC SUPERVISOR 3PIN MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
MAX810REXR from Maxim Integrated is a 3-pin microprocessor supervisory circuit with push-pull active-high RESET output, designed to monitor +2.5V, +3.0V, +3.3V, or +5V power supplies in embedded systems. It asserts reset when VCC falls below 2.63V (±1.5% threshold accuracy), holds reset active for ≥140ms after VCC recovers, and guarantees valid reset operation down to VCC = +1V - used in portable equipment, automotive ECUs, and industrial controllers requiring reliable brownout protection.
For engineers reviewing the MAX810REXR datasheet, MAX810REXR pinout, MAX810REXR application, or MAX810REXR equivalent, this page delivers verified electrical specs, SC70-3 package details, temperature-stable reset timing, supply-current behavior across -40°C to +125°C, and real-world interface guidance for µP reset pin compatibility and transient immunity.
Technical Context
The MAX810REXR integrates a precision voltage comparator with built-in hysteresis and a 140ms minimum reset timeout timer. Its reset threshold is trimmed to 2.63V with ±1.5% tolerance over -40°C to +125°C and exhibits 30ppm/°C tempco, ensuring stable trip points across wide temperature ranges.
It features a push-pull active-high RESET output capable of sourcing 150µA at 0.8×VCC (for VCC > 1.8V) and sinking 1.2mA at VOL ≤ 0.3V, eliminating external pull-up resistors required by open-drain variants like MAX803. The device ignores transients ≤20µs at 100mV overdrive, enhancing noise immunity in noisy power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% - precisely matches +3.0V supply systems with 12% margin before brownout failure. |
| Reset Timeout Duration | ≥140ms - ensures sufficient hold time for full µP initialization, even during slow power-rail recovery. |
| Supply Current | 17µA typical at +25°C (SC70) - enables multi-year battery life in always-on monitoring applications. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
| VCC Range | 1.2V to 5.5V - supports valid reset assertion down to 1.2V input, with functional reset output guaranteed to VCC = +1V. |
| Output Type | Push-pull active-high - directly drives CMOS inputs without external components; compatible with µP reset pins requiring high-true logic. |
| Transient Immunity | Rejects ≤20µs negative glitches at 100mV overdrive - prevents spurious resets in electrically noisy systems. |
Pinout & Package
MAX810REXR is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), rated for -40°C to +125°C operation and RoHS-compliant with lead-free option available (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high push-pull output | Drives high during normal operation; pulls low only during reset condition - interfaces directly with µP reset pins expecting active-high assertion. |
| 2: GND | Ground reference | Common return path for internal comparator and output stage; must be low-impedance to ensure accurate threshold sensing. |
| 3: VCC | Supply input | Monitored power rail input; powers internal circuitry and defines reset threshold reference - no external biasing required. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63V reset threshold | ±1.5% tolerance over full temperature range eliminates need for external calibration or trimming in +3.0V systems. |
| 140ms minimum reset pulse width | Guaranteed timing meets Intel/ARM µP power-on reset requirements without external RC networks. |
| 17µA supply current (typ) | Reduces quiescent load on battery-backed rails - critical for long-life portable instrumentation. |
| VCC = +1V reset validity | Ensures deterministic reset state even during deep brownout, preventing undefined µP behavior near shutdown. |
| 30ppm/°C tempco | Maintains tight threshold stability across automotive under-hood thermal cycles (-40°C to +125°C). |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in engine management system exposed to wide thermal and EMI stress. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting clean startup signal after ignition power ramp-up and rejecting crank-induced transients. Use Value: Prevents firmware corruption during cold cranking by holding reset until 3.3V rail stabilizes ≥140ms post-threshold recovery. |
Use Scenario: Ensures deterministic boot sequence for ARM-based PLC controller powered from isolated 3.0V DC-DC converter. IC Role / Device Role / Timing Role: Voltage-monitoring reset generator with guaranteed operation down to VCC = +1V during brownout events. Use Value: Eliminates need for external pull-up and reduces BOM count while maintaining reset integrity across -40°C to +85°C operating range. |
| Portable Medical Sensor Node | Smart Energy Meter MCU |
Use Scenario: Supervises coin-cell–powered 2.5V sensor hub MCU during intermittent wake/sleep cycles. IC Role / Device Role / Timing Role: Low-quiescent-current (17µA) reset supervisor enabling multi-year battery life with precise 2.63V trip point. Use Value: Detects early battery depletion before system malfunction, triggering graceful shutdown via active-high reset assertion. |
Use Scenario: Monitors 3.3V supply feeding metrology SoC in utility-grade electricity meter subject to grid sags and surges. IC Role / Device Role / Timing Role: Transient-immune reset circuit rejecting ≤20µs line noise spikes while asserting ≥140ms reset hold time. Use Value: Maintains data logging continuity and prevents EEPROM corruption during 100ms AC dropout events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809REUR-T | SOT23-3 package; rated for -40°C to +105°C; same 2.63V threshold and push-pull active-low output. | Requires logic inversion for µPs needing active-high reset; lower max ambient temperature limits use in under-hood locations. | Select when board layout uses SOT23 footprints or system operates ≤+105°C and accepts active-low signaling. |
| TPS3126E18DBVR | Texas Instruments part; 1.8V threshold; ±0.5% accuracy; 200ms reset timeout; 1.8V–5.5V VCC range. | Not drop-in: different threshold voltage and longer timeout; requires redesign if 2.63V trip and 140ms timing are system-critical. | Choose only if system targets 1.8V rails or demands tighter threshold accuracy and extended timeout - not a functional replacement for MAX810REXR. |
Compared with MAX809REUR-T, MAX810REXR provides active-high output and extended temperature support; compared with TPS3126E18DBVR, it offers exact +3.0V-system alignment, shorter reset hold time, and proven automotive qualification - making it optimal for cost-sensitive, thermally demanding 3.0V embedded designs.
Availability
MAX810REXR is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, portable medical sensors, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX810REXR 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, communications, and computing markets.
The MAX810REXR belongs to Maxim's microprocessor supervisory product line, engineered specifically for reliable power-on reset generation, brownout detection, and supply-voltage monitoring in space-constrained, thermally aggressive embedded systems.
FAQ
What is the reset threshold voltage of the MAX810REXR and how tightly is it specified?
The MAX810REXR has a nominal reset threshold of 2.63V, specified with ±1.5% tolerance over the full operating temperature range (-40°C to +125°C). This precision enables robust operation in +3.0V systems where supply droop beyond 12% indicates fault conditions - and is confirmed in the device's Electrical Characteristics table under "Reset Threshold (SC70 only)" for R-suffix variants.
Does the MAX810REXR require an external pull-up resistor on its RESET pin?
No, the MAX810REXR does not require an external pull-up resistor because it features a push-pull active-high RESET output. Unlike the open-drain MAX803 series, the MAX810REXR actively drives high during normal operation and low during reset - eliminating external components and simplifying PCB layout. This is explicitly stated in the General Description and Pin Description sections of the datasheet.
What is the minimum reset pulse width guaranteed by the MAX810REXR?
The MAX810REXR guarantees a minimum reset active timeout period of 140ms after VCC rises above the reset threshold. This value is tested and specified for the SC70 package across -40°C to +125°C and appears in the Electrical Characteristics table under "Reset Active Timeout Period (SC70)" - ensuring compliance with µP power-on reset timing requirements.
Can the MAX810REXR operate reliably when VCC drops below 1.5V?
Yes, the MAX810REXR guarantees valid reset output functionality down to VCC = +1V. As VCC declines, the device continues asserting correct logic states on the RESET pin until VCC reaches 1V - a key specification confirmed in both the General Description ("outputs are guaranteed to be in the correct logic state for VCC down to 1V") and Electrical Characteristics tables.
Which package type and temperature grade does the MAX810REXR use?
The MAX810REXR uses the 3-pin SC70-3 package and is rated for operation from -40°C to +125°C. This is documented in the Ordering Information table (listing "3 SC70-3 / -40°C to +125°C" for MAX810_EXR-T variants) and confirmed in the Absolute Maximum Ratings section - making it suitable for under-hood automotive and industrial applications.
MAX810REXR 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:
- 2.63V
- 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
MAX810REXR FAQ
1.How can I place an order for MAX810REXR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX810REXR 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 MAX810REXR reliable?
The price and inventory of MAX810REXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX810REXR is usually 5 days.
3.What payment methods are accepted for MAX810REXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX810REXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX810REXR?
MAX810REXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX810REXR 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 MAX810REXR?
For technical support, including MAX810REXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX810REXR requirements.
6.How does Aetrix verify that MAX810REXR is sourced from the original manufacturer or authorized distributors?
All MAX810REXR 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 MAX810REXR meets industry standards.
7.What is the process for return or replacement of MAX810REXR?
All MAX810REXR units undergo pre-shipment inspection (PSI). If there is an issue with MAX810REXR, 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 MAX810REXR part is unused and in its original packaging.
Return procedure for MAX810REXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX810REXR Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP130T-315I/TT
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MCP120T-475I/TT
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