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Analog Devices Inc./Maxim Integrated MAX809TEUR+T10
- Part No.:
- MAX809TEUR+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX809TEUR+T10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,993
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Product details
Overview
MAX809TEUR+T10 from Maxim Integrated is a 3-pin SOT23-packaged microprocessor supervisory circuit with push-pull active-low RESET output, 3.08V reset threshold (±2% 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 MAX809TEUR+T10 datasheet, MAX809TEUR+T10 pinout, MAX809TEUR+T10 application, or MAX809TEUR+T10 equivalent, this page delivers verified electrical specs, thermal performance limits, reset timing behavior, package dimensions, and real-world interface guidance for industrial and automotive-grade designs.
Technical Context
The MAX809TEUR+T10 implements a precision voltage-monitoring comparator with 30ppm/°C tempco and built-in hysteresis to reject fast VCC transients up to 100mV/20μs. Its internal reset timer guarantees ≥140ms assertion after VCC rises above 3.08V, with timeout extended to 560ms maximum at +85°C.
It features a push-pull active-low RESET output capable of sinking 3.2mA at VCC = VTH(min), with VOL ≤ 0.4V and VOH ≥ 0.8×VCC, enabling direct interfacing with CMOS/TTL inputs without external pullups - unlike open-drain variants such as MAX803.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2% (−40°C to +105°C); ensures reset asserts before system logic fails at 3.3V nominal supplies |
| Reset Timeout | 140ms min (−40°C to +85°C); holds μP in reset long enough for stable clock and supply settling |
| Supply Current | 17μA typ at +25°C, VCC = 3.3V; enables use in battery-powered devices with multi-year standby life |
| VCC Operating Range | 1.2V to 5.5V (−40°C to +105°C); supports brownout detection down to 1.2V while maintaining valid reset state |
| RESET Output Type | Push-pull active-low; eliminates need for external pullup resistor and reduces BOM count |
| Transient Immunity | Rejects VCC glitches ≤100mV amplitude and ≤20μs duration; prevents spurious resets in noisy environments |
| Output Drive Strength | Sinks 3.2mA at VCC = VTH(min); drives standard CMOS loads directly without level-shifting |
Pinout & Package
MAX809TEUR+T10 uses a 3-pin SOT23 package (JEDEC MO-178AA) with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads. Pin 1 = GND, Pin 2 = RESET (active-low push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low reset output | Drives low during power-up/brownout; remains low ≥140ms after VCC exceeds 3.08V; sinks 3.2mA minimum |
| VCC (Pin 3) | Supply input | Monitored voltage source; powers internal circuitry and defines reset threshold reference; accepts 1.2–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±2% tolerance over full temperature range ensures deterministic reset point for 3.3V systems |
| 140ms minimum reset pulse | Guarantees μP initialization completes before code execution begins, even under slow-rising VCC |
| 12μA supply current | Enables integration into always-on subsystems without compromising battery lifetime |
| VCC = 1V reset validity | RESET remains asserted and electrically defined down to 1V supply, preventing undefined logic states |
| Transient-immune comparator | Ignores VCC dips ≤100mV/20μs, eliminating false resets caused by switching noise or load transients |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power sequencing in programmable logic controllers where main 3.3V rail ramps slowly after cold start. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until 3.3V rail stabilizes above 3.08V and remains valid for ≥140ms. Use Value: Prevents firmware corruption by blocking CPU execution until all peripherals and clocks are fully powered and synchronized. | Use Scenario: Reset coordination across multiple ECUs sharing a common 3.3V domain in door module electronics. IC Role / Device Role / Timing Role: Single-point reset generator with AEC-Q100 qualified timing and voltage accuracy for fault-tolerant vehicle networks. Use Value: Ensures deterministic boot order and eliminates race conditions between microcontrollers during ignition-on transition. |
| Portable Medical Sensors | Smart Energy Meters |
Use Scenario: Battery-backed glucose monitor entering wake-from-sleep mode with marginal coin-cell voltage. IC Role / Device Role / Timing Role: Monitors decaying 3.3V LDO output and asserts RESET before analog front-end or ADC becomes unstable. Use Value: Avoids erroneous sensor readings by halting MCU operation when supply margin falls below safe operating threshold. | Use Scenario: Long-life electricity meter operating on supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse from capacitor discharge and triggers controlled shutdown sequence via active-low RESET. Use Value: Guarantees EEPROM write completion and nonvolatile register save before power loss-induced data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | 3.0V threshold, 200ms fixed timeout, 1.4μA quiescent current, SOT23-6 package | Requires external capacitor for timeout adjustment; lower IQ but larger footprint and different pinout | Select when ultra-low power dominates over board space and pin compatibility |
| STM809SWX6F | 3.08V threshold, 140ms timeout, 15μA IQ, SOT23-3, no AEC-Q100 qualification | Lacks automotive qualification; same pinout and electrical behavior but not validated for automotive temperature range | Select for cost-sensitive industrial designs where AEC-Q100 is not required |
Compared with TPS3808G30DBVR and STM809SWX6F, the MAX809TEUR+T10 offers AEC-Q100 qualification, identical SOT23-3 pinout, and guaranteed 140ms reset hold time without external components - making it optimal for automotive and high-reliability industrial deployments requiring drop-in compatibility and extended temperature support.
Availability
MAX809TEUR+T10 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical sensors, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX809TEUR+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 applications.
The MAX809 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation, brownout protection, and supply voltage monitoring in safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX809TEUR+T10 and how does it vary with temperature?
The MAX809TEUR+T10 has a nominal reset threshold of 3.08V with ±2% tolerance over −40°C to +105°C. Its tempco is 30ppm/°C, meaning threshold drift is limited to ±11.2mV across the full temperature range - ensuring consistent trip point for 3.3V systems regardless of ambient conditions. This specification is guaranteed per the datasheet's Electrical Characteristics table.
Does the MAX809TEUR+T10 require an external pullup resistor on the RESET pin?
No, the MAX809TEUR+T10 features a push-pull active-low RESET output and does not require an external pullup resistor. Unlike open-drain variants such as MAX803, its output actively drives high and low, simplifying PCB layout and reducing component count. The RESET pin sources current when deasserted and sinks up to 3.2mA when asserted.
What is the minimum VCC voltage at which the MAX809TEUR+T10 guarantees valid RESET output behavior?
The MAX809TEUR+T10 guarantees correct RESET logic state down to VCC = 1.0V. Below this, the output may become indeterminate. This is explicitly specified in the datasheet's Absolute Maximum Ratings and Electrical Characteristics sections, ensuring predictable reset assertion during deep brownout conditions before system collapse.
Is the MAX809TEUR+T10 qualified for automotive applications?
Yes, the MAX809TEUR+T10 is AEC-Q100 qualified for automotive applications. It operates over −40°C to +105°C and meets stress testing requirements for temperature cycling, humidity, and ESD - as confirmed in the Benefits and Features section of the official datasheet and Ordering Information table.
How does the MAX809TEUR+T10 handle fast transients on the VCC supply line?
The MAX809TEUR+T10's reset comparator rejects fast negative-going VCC transients up to 100mV amplitude and 20μs duration without asserting reset - verified in the Typical Operating Characteristics graphs and Applications Information section. This immunity prevents spurious resets in electrically noisy environments like motor drives or switching power supplies.
MAX809TEUR+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:
- 3.08V
- 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
MAX809TEUR+T10 FAQ
1.How can I place an order for MAX809TEUR+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX809TEUR+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 MAX809TEUR+T10 reliable?
The price and inventory of MAX809TEUR+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX809TEUR+T10 is usually 5 days.
3.What payment methods are accepted for MAX809TEUR+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX809TEUR+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX809TEUR+T10?
MAX809TEUR+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX809TEUR+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 MAX809TEUR+T10?
For technical support, including MAX809TEUR+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX809TEUR+T10 requirements.
6.How does Aetrix verify that MAX809TEUR+T10 is sourced from the original manufacturer or authorized distributors?
All MAX809TEUR+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 MAX809TEUR+T10 meets industry standards.
7.What is the process for return or replacement of MAX809TEUR+T10?
All MAX809TEUR+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX809TEUR+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 MAX809TEUR+T10 part is unused and in its original packaging.
Return procedure for MAX809TEUR+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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