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Analog Devices Inc./Maxim Integrated MAX6801UR44D3+
- Part No.:
- MAX6801UR44D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR44D3+.pdf
- Description:
- MAX6801 3-PIN, LOW-POWER MICROPR
- Quantity:
- Payment:
- Shipping:
Inventory:15,780
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Product details
Overview
MAX6801UR44D3+ from Maxim Integrated is a 3-pin SOT23 push/pull active-low microprocessor supervisory circuit designed to monitor 4.38V power supplies in embedded systems. It asserts RESET when VCC drops below 4.38V (±3% over temperature), maintains reset for ≥100ms after recovery, draws only 5µA typical supply current, and operates down to 0.7V VCC - enabling reliable brownout detection in battery-powered controllers and automotive ECUs.
For engineers reviewing the MAX6801UR44D3+ datasheet, MAX6801UR44D3+ pinout, MAX6801UR44D3+ application, or MAX6801UR44D3+ equivalent, this device serves as a precision, low-power reset supervisor for 4.38V rails where guaranteed reset validity down to 0.7V, transient immunity, and minimal board space are critical selection criteria.
Technical Context
The MAX6801UR44D3+ integrates a factory-trimmed voltage comparator with hysteresis and an internal timeout timer. Its reset threshold is fixed at 4.38V (min 4.249V, max 4.511V over –40°C to +125°C) and features propagation delay <30µs on VCC fall at 10V/ms.
It uses BiCMOS process technology to achieve ultra-low 4–12µA supply current across temperature, while maintaining push/pull output drive capability: VOL ≤0.4V at ISINK = 1.2mA (VCC ≥ 4.25V) and VOH ≥0.8×VCC at ISOURCE = 800µA (VCC ≥ 5.0V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±3% over –40°C to +125°C - ensures accurate 4.38V rail monitoring without external calibration |
| Reset Timeout Period | ≥100ms minimum - guarantees sufficient processor reset hold time after power recovery |
| Supply Current | 5µA typical at +25°C, VCC = +5.0V - enables multi-year operation in coin-cell–powered devices |
| Operating VCC Range | 0.7V to 5.5V - supports valid reset assertion during deep brownout and full rail operation |
| Output Type | Active-low push/pull - drives RESET directly without pullup resistor, compatible with standard µP reset inputs |
| VCC Transient Immunity | Rejects <30µs negative glitches at 100mV overdrive - prevents false resets from EMI or switching noise |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint ideal for space-constrained PCB layouts |
Pinout & Package
MAX6801UR44D3+ is housed in a RoHS-compliant 3-pin SOT23 package (outline U3-1, land pattern 90-0179), with gull-wing leads and 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage - must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull output - sinks current when asserted (VOL ≤0.4V), sources current when deasserted (VOH ≥0.8×VCC) |
| 3 | VCC | Power supply input - monitors this rail for undervoltage; device remains functional down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.38V threshold | Eliminates need for external resistive divider or trimming components - reduces BOM count and layout area |
| Guaranteed reset validity to 0.7V VCC | Ensures deterministic reset behavior during deep brownout, unlike many supervisors that fail below 1.0V |
| 100ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for microcontroller reset hold time after power recovery |
| 4.0µA typical supply current | Enables integration into always-on subsystems (e.g., CAN wake-up logic) without impacting battery life |
| Transient-immune comparator | Rejects fast VCC dips up to 100mV amplitude for <30µs - avoids spurious resets in noisy automotive environments |
Applications
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
|---|---|
|
Use Scenario: Monitoring 4.38V supply powering CAN transceiver and microcontroller in door module. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to halt MCU execution during battery sag below 4.38V. Use Value: Prevents firmware corruption by ensuring MCU remains held in reset until stable 4.38V rail is restored for ≥100ms. |
Use Scenario: Supervising 4.38V auxiliary rail feeding isolated digital I/O drivers in modular PLC backplane. IC Role / Device Role / Timing Role: Brownout detector generating clean reset pulse to synchronize I/O state recovery after power interruption. Use Value: Guarantees deterministic reinitialization of all I/O channels with no race conditions due to precise 4.38V threshold and 100ms timeout. |
| Portable Medical Sensor Hub | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Power monitoring for 4.38V rail derived from Li-ion battery via buck converter in handheld diagnostic device. IC Role / Device Role / Timing Role: Low-power supervisor maintaining reset assertion during battery discharge below 4.38V until recharge restores voltage. Use Value: Extends usable battery life by operating reliably down to 0.7V VCC while consuming only 5µA - no wake-up leakage penalty. |
Use Scenario: Ensuring secure boot integrity by validating 4.38V RTC/metering ASIC supply in ANSI C12.22–compliant smart meter. IC Role / Device Role / Timing Role: Tamper-resistant reset source with guaranteed timing and voltage accuracy across –40°C to +85°C operating range. Use Value: Meets ANSI C12.20 section 7.3.2 requirement for supply monitoring with ≤±3% threshold tolerance and ≥100ms reset duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 4.63V reset threshold, 240ms timeout, same SOT23-3 package and push/pull output | Higher threshold suits 4.63V rails; longer timeout may exceed some MCU minimum requirements | Select when system requires 4.63V trip point and extended reset hold time beyond 100ms |
| TLV809K33DBZR | 3.3V reset threshold, 140ms timeout, open-drain output, 1.8V–6V VCC range | Lower threshold targets 3.3V logic rails; open-drain requires external pullup and offers bidirectional reset sharing | Choose for 3.3V systems needing flexible reset bus architecture, not direct replacement for 4.38V monitoring |
Compared with MAX6801UR44D3+, MAX809TRD3+T provides higher threshold and longer timeout for robust 4.63V rail supervision, while TLV809K33DBZR serves distinct 3.3V applications with open-drain flexibility - neither is pin-compatible, but both address adjacent voltage-monitoring needs in industrial and portable designs.
Availability
MAX6801UR44D3+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O subsystems, and portable medical sensor hubs requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6801UR44D3+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, precision voltage supervision for microprocessor-based systems where board space, power budget, and brownout reliability are critical constraints.
FAQ
What is the exact reset threshold voltage of MAX6801UR44D3+ and how tightly is it specified?
The MAX6801UR44D3+ has a factory-trimmed nominal reset threshold of 4.38V, with guaranteed limits of 4.249V (min) and 4.511V (max) across the full –40°C to +125°C temperature range. This ±3% tolerance ensures consistent 4.38V rail monitoring without external calibration or adjustment, meeting stringent automotive and industrial voltage supervision requirements.
Does MAX6801UR44D3+ require any external components to function as a reset supervisor?
No, the MAX6801UR44D3+ requires zero external components - its 4.38V threshold is factory-trimmed, the 100ms reset timeout is internally generated, and the push/pull RESET output drives standard microcontroller reset inputs directly. This eliminates resistors, capacitors, or trimming potentiometers, reducing BOM cost and PCB area versus discrete supervision solutions.
Can MAX6801UR44D3+ operate reliably during severe brownout conditions?
Yes, the MAX6801UR44D3+ is guaranteed to maintain correct reset state down to VCC = 0.7V, and its push/pull output remains functional (VOL ≤0.4V at 1.2mA sink) even as supply voltage collapses. This ensures deterministic reset assertion during deep brownouts where competing supervisors may release reset prematurely, preventing MCU firmware corruption.
What is the supply current consumption of MAX6801UR44D3+ across temperature and voltage?
The MAX6801UR44D3+ draws only 4–12µA supply current (ICC) depending on VCC and temperature: 5µA typical at +25°C and VCC = +5.0V, rising to 10µA maximum at +125°C. This ultra-low quiescent current enables integration into always-on subsystems such as automotive wake-up circuits without compromising battery life or thermal design.
Is MAX6801UR44D3+ pin-compatible with other common reset supervisors?
The MAX6801UR44D3+ uses the standard 3-pin SOT23 package and shares pinout (GND, RESET, VCC) with MAX809/MAX810 and MAX6326/MAX6327 series, but differs in reset threshold and timeout. While not drop-in compatible due to its specific 4.38V/100ms configuration, the identical footprint allows layout reuse when migrating between Maxim's supervisory families with minor schematic updates.
MAX6801UR44D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR44D3+ FAQ
1.How can I place an order for MAX6801UR44D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR44D3+ 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 MAX6801UR44D3+ reliable?
The price and inventory of MAX6801UR44D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR44D3+ is usually 5 days.
3.What payment methods are accepted for MAX6801UR44D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR44D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR44D3+?
MAX6801UR44D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR44D3+ 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 MAX6801UR44D3+?
For technical support, including MAX6801UR44D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR44D3+ requirements.
6.How does Aetrix verify that MAX6801UR44D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6801UR44D3+ 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 MAX6801UR44D3+ meets industry standards.
7.What is the process for return or replacement of MAX6801UR44D3+?
All MAX6801UR44D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR44D3+, 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 MAX6801UR44D3+ part is unused and in its original packaging.
Return procedure for MAX6801UR44D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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