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Analog Devices Inc./Maxim Integrated MAX6801UR29D2
- Part No.:
- MAX6801UR29D2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR29D2.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,780
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Product details
Overview
MAX6801UR29D2 from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-3 package, providing active-low push/pull reset assertion when VCC drops below 2.93V, with guaranteed reset validity down to 0.7V and a minimum 20ms timeout period. It monitors power supplies in battery-powered controllers and embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6801UR29D2 datasheet, MAX6801UR29D2 pinout, MAX6801UR29D2 application, or MAX6801UR29D2 equivalent, key selection criteria include factory-trimmed 2.93V threshold accuracy (±1.8% at +25°C), ultra-low 4µA supply current at 3V, 20ms min reset timeout stability over -40°C to +125°C, and compatibility with bidirectional µP reset pins via push/pull drive strength.
Technical Context
The MAX6801UR29D2 integrates a precision voltage comparator with factory-trimmed 2.93V reset threshold and hysteresis, coupled to an internal timer that guarantees ≥20ms reset pulse width after VCC recovers above threshold. Its push/pull output drives RESET low with 50µA sink capability at VCC ≥ 1.0V (VOL ≤ 0.4V) and releases high with VOH ≥ 0.8×VCC at ISOURCE = 500µA.
Designed for immunity to fast transients, the reset comparator ignores VCC glitches <30µs at 100mV overdrive, and operates across full VCC range (0.7V to 5.5V) while maintaining valid RESET/RESET states-critical for safe power-down sequencing in portable instrumentation and industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ensures reliable brownout detection at nominal 2.93V supply level |
| Reset Timeout Period | 20ms minimum; guarantees sufficient hold time for µP initialization during power recovery |
| Supply Current | 4µA typical at VCC = 3.0V; enables multi-year battery life in portable equipment |
| Operating Voltage Range | 0.7V to 5.5V; supports operation down to near-zero VCC for fail-safe reset assertion |
| Output Type | Active-low push/pull; eliminates external pull-up resistor and simplifies interface to standard µP reset inputs |
| Temperature Range | -40°C to +125°C; fully specified for automotive under-hood and industrial control environments |
| VOL (ISINK = 50µA) | ≤0.4V at VCC ≥ 1.0V; ensures solid logic-low state even at ultra-low supply voltages |
Pinout & Package
MAX6801UR29D2 is housed in a 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height-optimized for space-constrained PCB layouts in handheld and sensor modules.
| 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 µP RESET pin low during undervoltage; actively pulls high when released-no external pull-up required |
| 3 (VCC) | Power supply input | Monitored voltage source; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed threshold | 2.93V with ±1.8% tolerance at +25°C-eliminates manual calibration and external resistive dividers |
| Ultra-low quiescent current | 4µA at 3V enables >10-year battery operation in always-on monitoring applications |
| Guaranteed reset validity to 0.7V | Ensures deterministic reset behavior during deep brownout-critical for data integrity in flash memory systems |
| Transient-immune comparator | Rejects VCC glitches <30µs wide-prevents spurious resets in noisy power environments |
| Three timeout options | 20ms minimum pulse width matches typical µP boot sequence timing requirements without overspecification |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring fail-safe power-on reset and brownout protection during intermittent battery discharge. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 microcontroller during VCC drop below 2.93V, holding for ≥20ms post-recovery. Use Value: Prevents corrupted EEPROM writes and firmware lockup by guaranteeing clean reset before µP executes boot code-even at 0.7V supply. | Use Scenario: DIN-rail mounted programmable logic controller modules exposed to 24VDC rail fluctuations and EMI-induced transients. IC Role / Device Role / Timing Role: Primary reset supervisor monitoring 3.3V logic rail derived from switching regulator; asserts RESET on brownout and holds for 20ms to ensure FPGA configuration stability. Use Value: Eliminates need for RC-based reset circuits and improves immunity to 10V/ms VCC transients per design spec. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Under-hood body control modules operating from vehicle battery (9–16V) with LDO-regulated 3.3V domain subject to cold-crank dips. IC Role / Device Role / Timing Role: Monitors 3.3V domain and triggers active-low RESET to Infineon AURIX TC2xx MCU when VCC falls below 2.93V during cranking events. Use Value: Maintains reset assertion down to 0.7V VCC-ensuring MCU remains held in reset until stable supply returns, preventing erratic CAN bus behavior. | Use Scenario: ANSI C12.20-compliant electricity meters with dual-supply architecture (battery backup + main AC/DC), requiring tamper-proof power-fail detection. IC Role / Device Role / Timing Role: Supervises 3.3V real-time clock and metrology SoC supply; asserts RESET on main supply collapse and holds for 20ms to initiate secure shutdown sequence. Use Value: Enables deterministic transition to battery-backed RTC mode without firmware intervention-meeting Class 0.2 accuracy retention requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | Same 2.93V threshold and 20ms timeout, but rated only to +85°C; 10µA ICC vs. 4µA | Limited to commercial-temperature consumer electronics-not suitable for automotive or extended industrial use | Select MAX809TRD2-T only if ambient temperature stays ≤+85°C and higher supply current is acceptable |
| TPS3808G33DBVR | 2.93V threshold with 20ms timeout, but open-drain output requiring external pull-up; 1.6µA ICC | Requires additional resistor; better for shared-reset bus architectures but adds layout complexity | Choose TPS3808G33DBVR when interfacing with multiple devices on common RESET line or when lowest ICC is critical |
Compared with MAX809TRD2-T and TPS3808G33DBVR, MAX6801UR29D2 delivers superior thermal robustness (-40°C to +125°C), lowest active current among push/pull alternatives, and zero-component interface-making it optimal for space- and reliability-critical embedded systems where board area and long-term stability are prioritized.
Availability
MAX6801UR29D2 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6801UR29D2 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-with emphasis on power efficiency, reliability, and integration.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space-constrained, battery-operated, and harsh-environment systems needing deterministic reset behavior across wide voltage and temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6801UR29D2 and how tightly is it specified?
The MAX6801UR29D2 has a factory-trimmed reset threshold of 2.93V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This precision eliminates need for external trimming components and ensures consistent brownout detection across temperature extremes-critical for reliable operation in automotive and industrial applications where supply rails vary significantly.
Does MAX6801UR29D2 require an external pull-up resistor on its RESET pin?
No, MAX6801UR29D2 does not require an external pull-up resistor because it features a push/pull output stage. The RESET pin actively drives low during reset assertion and actively pulls high when released-providing a clean, low-impedance interface to microcontroller reset inputs without added components or leakage concerns.
What is the minimum VCC voltage at which MAX6801UR29D2 guarantees valid RESET output?
MAX6801UR29D2 guarantees valid RESET/RESET output down to VCC = 0.7V across the full -40°C to +125°C temperature range. This ensures deterministic reset behavior during deep brownout conditions-enabling safe shutdown sequences and preventing partial execution of firmware in battery-powered or automotive systems where supply collapse may occur rapidly.
How does MAX6801UR29D2 handle fast transients on the VCC supply line?
MAX6801UR29D2's reset comparator is designed to reject fast negative-going VCC transients: it ignores pulses <30µs wide at 100mV overdrive, per the Maximum Transient Duration vs. Reset Comparator Overdrive graph in the datasheet. This immunity prevents spurious resets in electrically noisy environments such as motor drives or switch-mode power supply domains-enhancing system robustness without external filtering.
What package type and footprint does MAX6801UR29D2 use, and is it RoHS-compliant?
MAX6801UR29D2 uses the 3-pin SOT23-3 package (outline 21-0051) with 1.3mm × 2.9mm body size and 0.95mm height. It is available in both leaded and lead-free versions; the "-T" suffix denotes leaded packaging, while "+T" indicates RoHS-compliant lead-free construction-ensuring compliance with global environmental regulations and compatibility with modern reflow soldering processes.
MAX6801UR29D2 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:
- 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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR29D2 FAQ
1.How can I place an order for MAX6801UR29D2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR29D2 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 MAX6801UR29D2 reliable?
The price and inventory of MAX6801UR29D2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR29D2 is usually 5 days.
3.What payment methods are accepted for MAX6801UR29D2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR29D2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR29D2?
MAX6801UR29D2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR29D2 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 MAX6801UR29D2?
For technical support, including MAX6801UR29D2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR29D2 requirements.
6.How does Aetrix verify that MAX6801UR29D2 is sourced from the original manufacturer or authorized distributors?
All MAX6801UR29D2 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 MAX6801UR29D2 meets industry standards.
7.What is the process for return or replacement of MAX6801UR29D2?
All MAX6801UR29D2 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR29D2, 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 MAX6801UR29D2 part is unused and in its original packaging.
Return procedure for MAX6801UR29D2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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