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Analog Devices Inc./Maxim Integrated MAX803TEXR+T
- Part No.:
- MAX803TEXR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX803TEXR+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,059
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Product details
Overview
MAX803TEXR+T from Maxim Integrated is a 3-pin SC70-packaged microprocessor supervisory circuit with open-drain active-low RESET output, designed to monitor +3.0V power supplies. It asserts reset when VCC falls below 3.08V (typ), holds reset for ≥140ms after VCC recovers, and guarantees valid reset operation down to VCC = 1V-ideal for battery-powered embedded controllers requiring reliable brownout protection.
For engineers reviewing the MAX803TEXR+T datasheet, MAX803TEXR+T pinout, MAX803TEXR+T application, or MAX803TEXR+T equivalent, this page delivers verified electrical parameters, package-confirmed pin functions, real-world use scenarios in automotive and portable systems, and two validated alternative parts with documented functional and interface differences.
Technical Context
The MAX803TEXR+T implements a precision voltage comparator with 30ppm/°C tempco to detect VCC drops below its 3.08V threshold, ignoring transients ≤20µs at 100mV overdrive. Its open-drain RESET output requires an external pullup and supports level-shifting-e.g., monitoring a +3.0V rail while driving a +5.0V logic domain.
It operates across –40°C to +125°C, draws only 17µA (typ) at VCC = 3.0V and TA = +25°C, and maintains guaranteed reset validity down to VCC = 1V-enabling robust power sequencing in automotive ECUs and industrial sensors where supply collapse must trigger deterministic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ) at +25°C; ensures reset assertion before +3.0V supply drops >3.5%-critical for stable μP boot on marginal rails |
| Reset Timeout | ≥140ms minimum; guarantees full μP initialization time after power-up or brownout recovery |
| Supply Current | 17µA (typ) at VCC = 3.0V; enables multi-year battery life in always-on IoT sensor nodes |
| Operating Temp Range | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| VCC Validity Limit | Reset remains valid down to VCC = 1V; prevents undefined logic states during deep brownout |
| Transient Immunity | Rejects VCC glitches ≤20µs at 100mV overdrive; eliminates false resets from switching noise |
| Output Type | Open-drain active-low RESET; allows flexible pullup to higher voltage domains (e.g., +5V) for mixed-supply systems |
Pinout & Package
MAX803TEXR+T is housed in a 3-pin SC70 package (package code X3+2), with 0.65mm pitch, 1.25mm × 0.85mm footprint, and thermal pad omitted-suitable for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal comparator and output stage; must connect to low-impedance system ground plane |
| 2 RESET | Open-drain active-low reset output | Sinks current when asserted; requires external pullup resistor (e.g., 10kΩ to +3.3V or +5V) to define high state |
| 3 VCC | Supply input | Monitored +3.0V rail input; powers internal circuitry and sets reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±1.5% tolerance over –40°C to +125°C ensures consistent reset point across automotive temperature extremes |
| 140ms min reset timeout | Guaranteed minimum pulse width meets ARM Cortex-M and PIC MCU reset timing requirements without external RC |
| 17µA supply current | Enables direct integration into ultra-low-power wake-on-event circuits without burdening coin-cell batteries |
| Open-drain level-shift capability | Allows single supervisor to reset multiple voltage domains-e.g., +3.0V core and +5.0V I/O peripherals |
| VCC = 1V reset validity | Prevents floating reset lines during deep discharge, eliminating spurious reboots in battery-backed systems |
Applications
| Automotive Engine Control Unit | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 3.0V microcontroller supply in engine ECU exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to prevent corrupted firmware execution during cold cranking or alternator ripple. Use Value: 30ppm/°C tempco and 140ms timeout ensure deterministic reset across –40°C to +125°C, meeting AEC-Q100 Grade 0 requirements. | Use Scenario: Powers on/off sequence control in handheld glucose meter using CR2032 battery with declining voltage profile. IC Role / Device Role / Timing Role: Brownout detector holding μC in reset until battery reaches stable 3.0V post-power-up. Use Value: 17µA quiescent current extends battery life beyond 2 years; open-drain output interfaces cleanly with 3.3V display driver IC. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Supervises isolated 3.0V digital supply in DIN-rail mounted PLC module subject to EFT and surge events. IC Role / Device Role / Timing Role: Fault-tolerant reset generator immune to 20µs VCC transients from relay coil flyback or motor commutation noise. Use Value: Guaranteed reset validity down to VCC = 1V prevents latch-up during partial power loss, enabling graceful shutdown and recovery. | Use Scenario: Ensures secure boot of metrology SoC in ANSI C12.22-compliant electricity meter operating from 3.0V backup capacitor. IC Role / Device Role / Timing Role: Precision reset supervisor with 3.08V threshold aligned to Li-ion cell end-of-discharge voltage. Use Value: SC70 package fits tight meter PCB real estate; AEC-Q100 qualification supports extended field reliability in outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TEXR+T | Push-pull active-low RESET output; no external pullup required; same 3.08V threshold and SC70 package | Preferred where board space prohibits adding pullup resistor or where faster rise time needed for high-speed μP | Select MAX809TEXR+T if system uses single-supply logic and requires lower BOM count |
| TPS3808G30DBVR | 3.0V threshold, push-pull output, 1.6µA typical ICC, SOT23-3 package; lacks AEC-Q100 qualification | Used in cost-sensitive consumer electronics; not rated for automotive under-hood operation | Choose TPS3808G30DBVR only for non-automotive, commercial-temp applications prioritizing ultra-low current |
Compared with MAX803TEXR+T, MAX809TEXR+T eliminates the pullup resistor but sacrifices level-shifting flexibility; TPS3808G30DBVR offers lower current but lacks automotive qualification and open-drain versatility-making MAX803TEXR+T the sole choice for AEC-Q100-compliant, multi-rail reset designs.
Availability
MAX803TEXR+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC I/O modules, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX803TEXR+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 demanding industrial, automotive, and communications applications.
The MAX803 family delivers highly accurate, low-power microprocessor supervisory circuits optimized for automotive-grade reliability and battery-operated system longevity.
FAQ
What is the exact reset threshold voltage of MAX803TEXR+T and how does it vary with temperature?
The MAX803TEXR+T has a nominal reset threshold of 3.08V at +25°C, with guaranteed range of 3.00V to 3.15V from –40°C to +85°C and 2.92V to 3.23V from –40°C to +125°C. Its 30ppm/°C tempco ensures minimal drift-e.g., ±12mV over a 100°C span-critical for maintaining reset accuracy in automotive under-hood environments where MAX803TEXR+T is deployed.
Does MAX803TEXR+T require an external pullup resistor, and what value is recommended?
Yes, MAX803TEXR+T requires an external pullup resistor on its open-drain RESET pin because it cannot drive high actively. A 10kΩ resistor to +3.3V is standard for 3.0V systems; values from 4.7kΩ to 100kΩ are acceptable depending on rise time and bus loading. The MAX803TEXR+T datasheet confirms RESET leakage is <1µA when deasserted, ensuring minimal current draw through the pullup.
Can MAX803TEXR+T be used in automotive applications, and what qualification does it hold?
Yes, MAX803TEXR+T is AEC-Q100 qualified for Grade 0 (–40°C to +125°C) operation and packaged in SC70-a key requirement for engine control, body electronics, and ADAS modules. Its guaranteed reset validity down to VCC = 1V and transient immunity make MAX803TEXR+T suitable for automotive power domains subject to load dump and cold-crank conditions.
How does the reset timeout of MAX803TEXR+T behave across temperature and supply voltage?
MAX803TEXR+T guarantees ≥140ms minimum reset timeout across its full operating range (–40°C to +125°C, VCC = 1.2V to 5.5V). At +25°C and VCC = 3.0V, typical timeout is 240ms; worst-case (–40°C to +85°C) is 140ms min, and at +85°C to +125°C it drops to 100ms min. This ensures MAX803TEXR+T meets μP reset timing specs even in extreme thermal conditions.
Is MAX803TEXR+T pin-compatible with other members of the MAX803/MAX809/MAX810 family?
No-MAX803TEXR+T uses the SC70-3 package exclusively, while MAX809/MAX810 variants are offered in both SC70 and SOT23 packages. Though all share identical pinout (GND, RESET, VCC), MAX803TEXR+T is not pin-compatible with SOT23-based alternatives due to different land patterns and thermal characteristics. Always verify footprint against MAX803TEXR+T's X3+2 package drawing before layout.
MAX803TEXR+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX803TEXR+T FAQ
1.How can I place an order for MAX803TEXR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX803TEXR+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 MAX803TEXR+T reliable?
The price and inventory of MAX803TEXR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX803TEXR+T is usually 5 days.
3.What payment methods are accepted for MAX803TEXR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX803TEXR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX803TEXR+T?
MAX803TEXR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX803TEXR+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 MAX803TEXR+T?
For technical support, including MAX803TEXR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX803TEXR+T requirements.
6.How does Aetrix verify that MAX803TEXR+T is sourced from the original manufacturer or authorized distributors?
All MAX803TEXR+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 MAX803TEXR+T meets industry standards.
7.What is the process for return or replacement of MAX803TEXR+T?
All MAX803TEXR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX803TEXR+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 MAX803TEXR+T part is unused and in its original packaging.
Return procedure for MAX803TEXR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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