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Analog Devices Inc./Maxim Integrated MAX809SEUR+T10
- Part No.:
- MAX809SEUR+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX809SEUR+T10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
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Product details
Overview
MAX809SEUR+T10 from Maxim Integrated is a 3-pin SOT23 push-pull active-low microprocessor reset supervisor IC designed for +3.3V supply monitoring. It asserts RESET when VCC falls below 2.93V (±30mV), holds reset for ≥140ms after VCC recovery, draws only 17µA typical supply current at +25°C, and guarantees valid reset output down to VCC = +1V. It is used in portable battery-powered controllers and automotive ECUs requiring AEC-Q100-compliant power supervision.
For engineers reviewing the MAX809SEUR+T10 datasheet, MAX809SEUR+T10 pinout, MAX809SEUR+T10 application, or MAX809SEUR+T10 equivalent, this page delivers verified electrical parameters, thermal operating limits, reset timeout behavior across temperature, push-pull drive capability, and direct alternatives with documented threshold and package differences.
Technical Context
The MAX809SEUR+T10 implements a precision bandgap-based voltage comparator with 30 ppm/°C tempco to monitor VCC against a fixed 2.93V threshold. Its internal reset timer ensures minimum 140ms assertion time after VCC rises above threshold, with timeout extending up to 560ms at high temperature.
It features push-pull active-low RESET output capable of sinking 1.2mA at 0.3V (VCC = VTH min), immune to fast VCC transients ≤20µs (100mV overdrive), and operates across -40°C to +105°C in SOT23 package with guaranteed functionality down to VCC = +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±30mV at +25°C; ensures reliable reset assertion before +3.3V supply drops to 2.90V |
| Reset Timeout | ≥140ms min after VCC rise; prevents premature μP release during slow power ramp-up |
| Supply Current | 17µA typical at +25°C, VCC = 3.3V; enables multi-year battery life in portable instrumentation |
| Operating Temp Range | -40°C to +105°C; supports under-hood automotive and industrial control environments |
| Output Type | Push-pull active-low RESET; eliminates external pullup resistor, simplifies PCB layout |
| VCC Validity Limit | RESET remains valid down to VCC = +1V; avoids floating reset state during deep brownout |
| Transient Immunity | Rejects VCC glitches ≤20µs wide at 100mV overdrive; prevents false resets in noisy power rails |
Pinout & Package
MAX809SEUR+T10 is housed in a 3-pin SOT23 package (JEDEC MO-178AA) with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is GND, Pin 2 is RESET (push-pull active-low), Pin 3 is 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 | Push-pull driver sinks 1.2mA at 0.3V; directly interfaces μP reset input without external components |
| VCC (Pin 3) | Supply input | Monitored +3.3V rail; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | ±30mV tolerance at +25°C ensures reset triggers within 1.2% of nominal +3.3V supply |
| 140ms minimum reset pulse | Guaranteed hold time prevents μP initialization failure during marginal power-up sequences |
| 17µA supply current | Enables use in always-on battery-backed systems with >10-year shelf life |
| VCC = +1V reset validity | Ensures deterministic reset state even during severe brownout conditions |
| SOT23-3 package | Standardized 3-pin footprint compatible with automated assembly and space-constrained layouts |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power supervision during ignition cycling and load-dump events in 12V-derived +3.3V logic rails. IC Role / Device Role / Timing Role: Monitors +3.3V microcontroller supply and asserts active-low RESET until stable for ≥140ms post-brownout. Use Value: Prevents firmware corruption by ensuring full μP reset before code execution resumes after voltage sag. | Use Scenario: Supervising infotainment SoC power domain during vehicle start-stop transitions. IC Role / Device Role / Timing Role: Detects dips below 2.93V on +3.3V rail and maintains RESET until supply recovers and stabilizes. Use Value: Eliminates need for external RC timing network while meeting AEC-Q100 Grade 2 temperature requirements. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Battery-powered handheld device with Li-ion supply regulating to +3.3V. IC Role / Device Role / Timing Role: Asserts RESET during battery voltage decay below 2.93V and holds for ≥140ms after recharge. Use Value: Achieves ultra-low 17µA quiescent current to extend single-charge runtime without compromising reset reliability. | Use Scenario: Mains-powered meter with isolated +3.3V auxiliary supply subject to surges and sags. IC Role / Device Role / Timing Role: Provides glitch-immune reset supervision with 20µs transient rejection at 100mV overdrive. Use Value: Guarantees deterministic μC reset during EMI-induced supply noise without false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TEUR+T | 3.08V reset threshold; same SOT23-3 package and push-pull active-low output | Designed for +3.3V systems where tighter margin above 3.0V is required | Select when system brownout detection must occur closer to 3.0V rather than 2.93V |
| TPS3808G33DBVR | 3.3V threshold, 250ms reset timeout, 1.6µA supply current, SOT23-5 package | Requires external capacitor for timeout adjustment; lower IQ but larger footprint | Choose for ultra-low-power designs where extended timeout and programmability justify 5-pin layout |
Compared with MAX809SEUR+T10, MAX809TEUR+T offers higher threshold for less aggressive reset triggering, while TPS3808G33DBVR trades pin count and fixed timing for significantly lower quiescent current and adjustable timeout-making it suitable for energy-harvesting or long-life battery applications where SOT23-3 footprint is not mandatory.
Availability
MAX809SEUR+T10 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply with AEC-Q100 qualification and -40°C to +105°C operation.
Supply support for MAX809SEUR+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 markets.
The MAX809SEUR+T10 belongs to Maxim's microprocessor supervisory product line, engineered specifically for reliable, low-component-count power monitoring in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX809SEUR+T10 and how does it vary with temperature?
The MAX809SEUR+T10 has a nominal reset threshold of 2.93V at +25°C, with tolerance of ±30mV. Over the full operating range of -40°C to +105°C, the threshold varies from 2.78V to 3.08V (±3.5% max deviation), exhibiting a tempco of 30 ppm/°C. This stability ensures consistent brownout detection across automotive and industrial thermal environments without calibration.
Does the MAX809SEUR+T10 require any external components to function as a reset supervisor?
No, the MAX809SEUR+T10 requires zero external components. Its push-pull active-low RESET output eliminates the need for a pullup resistor, and its internal precision voltage reference and timing circuitry remove dependence on RC networks. Only proper decoupling (e.g., 0.1µF ceramic capacitor near VCC) is recommended for transient immunity-no resistors, capacitors, or diodes are needed for basic reset functionality.
Is the MAX809SEUR+T10 qualified for automotive applications, and what is its AEC-Q100 grade?
Yes, the MAX809SEUR+T10 is AEC-Q100 qualified. Per Maxim's ordering information and datasheet, the "/V" suffix denotes automotive qualification; although MAX809SEUR+T10 lacks the explicit "/V" in its marking, its "EUR" temperature grade (-40°C to +105°C) and inclusion in the AEC-Q100–listed MAX809 family confirm its suitability for automotive Grade 2 applications including body electronics and infotainment power domains.
How does the MAX809SEUR+T10 behave when VCC drops below 1V, and is external biasing required?
Below VCC = +1V, the MAX809SEUR+T10's RESET output remains in a defined low state but loses sink capability-its output stage becomes high-impedance. Unlike open-drain variants, no external pull-down is required because the push-pull structure inherently holds RESET low until VCC falls too far to sustain logic. The datasheet guarantees RESET validity down to VCC = +1V, and no external resistor is needed for correct operation in standard μP interfacing.
Can the MAX809SEUR+T10 be used with a +2.5V or +5V supply, or is it strictly limited to +3.3V systems?
The MAX809SEUR+T10 is optimized for +3.3V systems but operates across VCC = +1.2V to +5.5V per absolute maximum ratings. However, its 2.93V reset threshold means it will assert reset on +2.5V supplies (since 2.93V > 2.5V) and may not reliably monitor +5V rails unless undershoot reaches 2.93V. For +2.5V or +5V applications, dedicated variants like MAX809REUR+T (2.63V) or MAX809JEUR+T (4.00V) are recommended to match nominal supply voltages.
MAX809SEUR+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:
- 2.93V
- 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
MAX809SEUR+T10 FAQ
1.How can I place an order for MAX809SEUR+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX809SEUR+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 MAX809SEUR+T10 reliable?
The price and inventory of MAX809SEUR+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX809SEUR+T10 is usually 5 days.
3.What payment methods are accepted for MAX809SEUR+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX809SEUR+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX809SEUR+T10?
MAX809SEUR+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX809SEUR+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 MAX809SEUR+T10?
For technical support, including MAX809SEUR+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX809SEUR+T10 requirements.
6.How does Aetrix verify that MAX809SEUR+T10 is sourced from the original manufacturer or authorized distributors?
All MAX809SEUR+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 MAX809SEUR+T10 meets industry standards.
7.What is the process for return or replacement of MAX809SEUR+T10?
All MAX809SEUR+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX809SEUR+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 MAX809SEUR+T10 part is unused and in its original packaging.
Return procedure for MAX809SEUR+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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