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Analog Devices Inc./Maxim Integrated MAX6801UR31D2+T
- Part No.:
- MAX6801UR31D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR31D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,831
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Product details
Overview
MAX6801UR31D2+T from Maxim Integrated is a precision 3.08V active-low microprocessor supervisory circuit in SOT23-3 package, designed to monitor VCC supply voltage and assert a push/pull RESET signal during power-up, brownout, or power-down events. It guarantees valid reset operation down to VCC = 0.7V, features 20ms minimum reset timeout, consumes only 4–12µA supply current, and operates across –40°C to +125°C for industrial embedded control applications.
For engineers reviewing the MAX6801UR31D2+T datasheet, MAX6801UR31D2+T pinout, MAX6801UR31D2+T application, or MAX6801UR31D2+T equivalent, key selection criteria include factory-trimmed 3.08V reset threshold tolerance (±1.8% at +25°C, ±3% over full temperature), push/pull output drive capability (VOH ≥ 0.8×VCC, VOL ≤ 0.4V at 50µA), transient immunity up to 30µs at 100mV overdrive, and guaranteed reset assertion validity below 1V supply.
Technical Context
The MAX6801UR31D2+T implements a precision bandgap-based voltage comparator with factory-trimmed 3.08V threshold and hysteresis optimized for stable reset assertion during VCC transients. Its internal timing circuit generates a fixed 20ms (min) reset pulse width after VCC rises above threshold, independent of external components.
It uses BiCMOS process technology to achieve ultra-low 4µA typical supply current at 3V and maintain push/pull output logic states (RESET low during fault, high otherwise) with rail-to-rail VOH and sub-0.4V VOL across its full operating voltage range (0.7V to 5.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.8% at +25°C; ensures reliable detection of VCC drop below nominal 3.3V supply level |
| Reset Timeout Period | 20ms (min); guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and compatibility with 1.8V–5V systems |
| Supply Current | 4µA (typ) at 3V; enables battery-powered equipment with multi-year runtime |
| Output Type | Active-low push/pull RESET; drives high/low without external pull-up, simplifying interface to µP reset pins |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| VCC Propagation Delay | 30µs max at 10V/ms VCC fall rate; rejects fast supply glitches without false resets |
Pinout & Package
MAX6801UR31D2+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Active-low push/pull reset output | Drives low during VCC fault and remains low for 20ms after recovery; sinks 50µA with VOL ≤ 0.4V, sources 500µA with VOH ≥ 0.8×VCC |
| 3 (VCC) | Supply voltage input | Monitored power rail input; device asserts reset when VCC falls below 3.08V and remains functional down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±1.8% accuracy at +25°C ensures precise 3.3V supply monitoring without calibration |
| No external components required | Integrated comparator, timer, and push/pull driver eliminate discrete resistors, capacitors, and transistors |
| Ultra-low supply current | 4µA typical at 3V enables use in always-on battery-backed systems without significant drain |
| Power-supply transient immunity | Rejects negative-going VCC glitches up to 30µs duration at 100mV overdrive, preventing spurious resets |
| Guaranteed reset validity to 0.7V | Ensures deterministic RESET state even during severe brownout conditions common in automotive start-stop |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 3.3V microcontroller supply in programmable logic controllers exposed to wide ambient temperature swings and EMI-rich factory floors. IC Role / Device Role / Timing Role: Precision reset supervisor asserting active-low signal during brownout to prevent firmware corruption and ensure clean boot sequence. Use Value: 20ms minimum timeout provides ample time for FPGA configuration and peripheral initialization before CPU release. |
Use Scenario: Supervising 3.3V domain in body control units powered by vehicle battery with cold-cranking voltage dips below 6V. IC Role / Device Role / Timing Role: Reset generator maintaining valid RESET output down to 0.7V VCC to guarantee safe shutdown during cranking transients. Use Value: Push/pull output eliminates need for external pull-up resistor, reducing BOM count and PCB area in tight under-dash modules. |
| Medical Infusion Pumps | Smart Energy Meters |
|
Use Scenario: Ensuring fail-safe restart of safety-critical ARM Cortex-M4 controller after AC power interruption or battery swap. IC Role / Device Role / Timing Role: Fault-tolerant power monitor triggering hardware reset when 3.3V rail drops below 3.08V due to capacitor discharge or load surge. Use Value: ±3% threshold tolerance over –40°C to +125°C prevents nuisance resets in sterilization ovens or outdoor enclosures. |
Use Scenario: Supervising metrology SoC supply in ANSI C12.22-compliant meters deployed in utility substations with wide thermal cycling. IC Role / Device Role / Timing Role: Brownout detector holding µP in reset until stable 3.3V rail is re-established post-power-failure recovery. Use Value: 4µA quiescent current extends lithium-thionyl chloride battery life beyond 10 years in tamper-proof meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 3.08V threshold, 20ms timeout, same SOT23-3 package, but higher 15µA ICC and ±2.5% threshold tolerance | Limited to commercial temperature range (–40°C to +85°C), not rated for extended industrial or automotive use | Select when cost sensitivity outweighs extended temp qualification and ultra-low current requirements |
| TPS3808G30DBVR | 3.0V threshold (not 3.08V), 20ms timeout, 1.8µA ICC, but requires external pull-up for open-drain output | Open-drain output necessitates external resistor; lacks guaranteed 0.7V operation and push/pull drive simplicity | Choose where lowest possible current dominates and board space allows for pull-up component |
Compared with MAX809TRD2+T and TPS3808G30DBVR, MAX6801UR31D2+T delivers tighter threshold accuracy, lower supply current, guaranteed operation down to 0.7V, and true push/pull output - making it optimal for high-reliability industrial and automotive reset supervision where minimal BOM and deterministic behavior are critical.
Availability
MAX6801UR31D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with long lifecycle assurance.
Supply support for MAX6801UR31D2+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 industrial, automotive, and communications applications, emphasizing reliability, low power, and integration.
The MAX6800/MAX6801/MAX6802 family targets space-constrained µP systems needing single-chip, no-component reset supervision with guaranteed low-voltage operation and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6801UR31D2+T and how tightly is it specified?
The MAX6801UR31D2+T has a factory-trimmed nominal reset threshold of 3.08V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This precision ensures reliable detection of 3.3V supply brownout without false triggering or missed events, and is confirmed in Table 1 and Electrical Characteristics of the official datasheet.
Does MAX6801UR31D2+T require any external components to function as a reset supervisor?
No, MAX6801UR31D2+T operates as a complete reset solution with no external components required. Its integrated voltage comparator, timing circuit, and push/pull output driver eliminate the need for external resistors, capacitors, or transistors - enabling direct connection between VCC, GND, and the microprocessor's reset pin.
What is the minimum supply voltage at which MAX6801UR31D2+T guarantees correct reset output behavior?
MAX6801UR31D2+T guarantees correct RESET/RESET output state down to VCC = 0.7V, as explicitly stated in the General Description and Absolute Maximum Ratings sections. This ensures deterministic reset assertion during deep brownout conditions common in automotive and battery-powered systems.
How does the 20ms reset timeout period of MAX6801UR31D2+T benefit system reliability?
The 20ms (minimum) reset timeout period of MAX6801UR31D2+T ensures the microprocessor remains held in reset long enough for power rails to stabilize, clock circuits to lock, and internal registers to clear - preventing erratic startup behavior or corrupted firmware execution in complex embedded systems.
Is MAX6801UR31D2+T pin-compatible with other supervisory ICs, and if so, which ones?
Yes, MAX6801UR31D2+T is pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 per the Benefits and Features section. All share identical SOT23-3 pinout (GND, RESET, VCC), enabling drop-in replacement in existing layouts where voltage threshold and timeout match design requirements.
MAX6801UR31D2+T 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:
- Obsolete
- 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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR31D2+T FAQ
1.How can I place an order for MAX6801UR31D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR31D2+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 MAX6801UR31D2+T reliable?
The price and inventory of MAX6801UR31D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR31D2+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR31D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR31D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR31D2+T?
MAX6801UR31D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR31D2+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 MAX6801UR31D2+T?
For technical support, including MAX6801UR31D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR31D2+T requirements.
6.How does Aetrix verify that MAX6801UR31D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR31D2+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 MAX6801UR31D2+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR31D2+T?
All MAX6801UR31D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR31D2+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 MAX6801UR31D2+T part is unused and in its original packaging.
Return procedure for MAX6801UR31D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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