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Analog Devices Inc./Maxim Integrated MAX6801UR29D2-T
- Part No.:
- MAX6801UR29D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR29D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:35,000
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Product details
Overview
MAX6801UR29D2-T from Maxim Integrated is a precision microprocessor supervisory circuit with push/pull active-low RESET output, 2.93V factory-trimmed reset threshold, and 20ms minimum reset timeout period. It monitors VCC in 2.85V–5.0V digital systems, asserts reset during brownout/power-down, and guarantees valid RESET down to VCC = 0.7V. Used in portable equipment, controllers, and critical μP power monitoring.
For engineers reviewing the MAX6801UR29D2-T datasheet, MAX6801UR29D2-T pinout, MAX6801UR29D2-T application, or MAX6801UR29D2-T equivalent, key selection factors include guaranteed 0.7V operation, 4μA supply current, SOT23-3 package compatibility, and precise 2.93V ±1.8% threshold at +25°C.
Technical Context
The MAX6801UR29D2-T implements a precision bandgap-based reset comparator with factory-trimmed 2.93V threshold and hysteresis optimized for immunity to fast VCC transients (≤30µs at 100mV overdrive). Its push/pull output drives CMOS inputs directly without external pull-up.
Reset assertion is triggered on VCC falling below 2.93V and held for ≥20ms after VCC rises above threshold. The device operates across -40°C to +125°C, with supply current stable from 4μA (VCC = 3.0V) to 5μA (VCC = 5.0V), and maintains RESET validity down to VCC = 0.7V.
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; holds processor in reset long enough for stable power recovery |
| Supply Voltage Range | 0.7V to 5.5V; enables operation during deep brownout and full-system power sequencing |
| Supply Current | 4μA at VCC = 3.0V; minimizes battery drain in portable/battery-powered systems |
| Output Type | Active-low push/pull RESET; eliminates need for external pull-up resistor |
| Operating Temperature | -40°C to +125°C; qualified for industrial and automotive under-hood environments |
| VCC Propagation Delay | 30µs max at 10V/ms VCC fall rate; rejects sub-30µs noise spikes on supply rail |
Pinout & Package
MAX6801UR29D2-T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), 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 reset comparator and output driver; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-Low Push/Pull Output | Drives μP RESET pin low during fault; actively pulls high when deasserted - no external pull-up required |
| 3 (VCC) | Supply Input | Monitored power rail input; supports operation down to 0.7V while maintaining valid RESET state |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Guaranteed RESET functionality down to VCC = 0.7V - enables robust reset during severe brownout |
| Precision reset threshold | Factory-trimmed 2.93V ±1.8% at +25°C and ±3% over full temperature range - eliminates manual calibration |
| Transient immunity | Rejects VCC glitches ≤30µs duration at 100mV overdrive - prevents false resets from switching noise |
| No external components | Self-contained reset generator - requires only VCC, GND, and RESET connection to μP - reduces BOM count and layout area |
| Low quiescent current | 4μA typical at 3.0V - extends battery life in always-on portable instrumentation |
Applications
| Portable/Battery-Powered Equipment | Critical μP/μC Power Monitoring |
|---|---|
Use Scenario: Handheld test meters and wireless sensors operating from single-cell Li-ion or alkaline batteries with wide VCC droop during load transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold microcontroller in reset until battery voltage recovers above 2.93V. Use Value: Prevents erratic firmware execution during brownout by guaranteeing RESET remains asserted down to VCC = 0.7V and for ≥20ms post-recovery. |
Use Scenario: Industrial PLC modules requiring deterministic startup and fault recovery under fluctuating 3.3V or 5V rails. IC Role / Device Role / Timing Role: Primary power-good monitor generating a clean, glitch-immune reset pulse synchronized to VCC stabilization. Use Value: Eliminates need for RC-based reset circuits - delivers repeatable 20ms reset pulse with ±3% threshold accuracy over -40°C to +125°C. |
| Controllers | Intelligent Instruments |
Use Scenario: Motor control boards where EMI-induced VCC dips must not trigger spurious resets during commutation. IC Role / Device Role / Timing Role: Immune reset supervisor rejecting <30µs transients while asserting reset for ≥20ms on sustained undervoltage. Use Value: Ensures controller remains operational during brief supply disturbances - improves system uptime and reliability. |
Use Scenario: Digital multimeters and oscilloscope front-ends requiring cold-start reliability and EEPROM write protection during power loss. IC Role / Device Role / Timing Role: System-level reset initiator that gates μC execution until regulated 3.3V rail is stable above 2.93V. Use Value: Enables safe power-fail interrupt handling and nonvolatile memory write completion before reset assertion. |
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 | 2.93V threshold, 20ms timeout, same SOT23-3 package, but higher 15μA supply current and only specified down to VCC = 1.0V | Lacks guaranteed operation below 1.0V - unsuitable for ultra-low-voltage brownout detection | Select MAX809TRD2-T only if supply current >4μA is acceptable and VCC never falls below 1.0V. |
| MAX6327LT29D2-T | 2.93V threshold, 20ms timeout, push/pull output, but rated only to +85°C and consumes 8μA at 3.0V | Not qualified for extended industrial temperature range (-40°C to +125°C) | Choose MAX6327LT29D2-T only for commercial-temperature consumer applications with relaxed thermal requirements. |
Compared with MAX809TRD2-T and MAX6327LT29D2-T, the MAX6801UR29D2-T uniquely combines 0.7V operation, 4μA supply current, and full -40°C to +125°C qualification - making it optimal for battery-critical and thermally demanding embedded systems.
Availability
MAX6801UR29D2-T is available at Aetrix Electronics and suitable for portable equipment, industrial controllers, intelligent instruments, and critical μP/μC power monitoring requiring stable component supply across extended temperature ranges and low-power operation.
Supply support for MAX6801UR29D2-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, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing applications.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, high-accuracy microprocessor supervisory functions - engineered specifically for space-constrained, battery-sensitive, and thermally harsh embedded systems requiring guaranteed reset behavior down to 0.7V.
FAQ
What is the exact reset threshold voltage of MAX6801UR29D2-T and how tightly is it specified?
The MAX6801UR29D2-T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±1.8% at +25°C and ±3% over the full -40°C to +125°C operating range. This precision eliminates external adjustment and ensures consistent brownout detection across temperature and unit-to-unit variation - critical for reliable μP startup in industrial environments.
Does MAX6801UR29D2-T require an external pull-up resistor on its RESET pin?
No. The MAX6801UR29D2-T features a push/pull active-low RESET output, meaning it actively drives the output low during reset assertion and actively pulls it high when deasserted. Unlike open-drain alternatives, it requires no external pull-up resistor - simplifying design and reducing component count.
What is the minimum supply voltage at which MAX6801UR29D2-T guarantees valid RESET operation?
The MAX6801UR29D2-T guarantees correct RESET/RESET state down to VCC = 0.7V - a key differentiator versus many competing supervisors limited to 1.0V or higher. This enables reliable reset assertion even during deep brownout conditions common in battery-powered systems approaching end-of-life.
How does MAX6801UR29D2-T handle fast transients on the VCC line?
The MAX6801UR29D2-T's reset comparator is designed to reject fast negative-going VCC transients up to 30µs in duration when overdriven by 100mV - preventing false resets caused by switching noise or EMI. This transient immunity is characterized and guaranteed per the Typical Operating Characteristics graphs in the datasheet.
Is MAX6801UR29D2-T compatible with standard SOT23-3 footprints and assembly processes?
Yes. The MAX6801UR29D2-T uses the industry-standard 3-pin SOT23-3 package (outline 21-0051) with 0.95mm height and 0.95mm pitch. It supports standard reflow soldering profiles including lead-free (up to +260°C) and is compatible with automated pick-and-place and AOI inspection systems used in high-volume manufacturing.
MAX6801UR29D2-T 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-T FAQ
1.How can I place an order for MAX6801UR29D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR29D2-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 MAX6801UR29D2-T reliable?
The price and inventory of MAX6801UR29D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR29D2-T is usually 5 days.
3.What payment methods are accepted for MAX6801UR29D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR29D2-T transactions.
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4.How is shipping managed for MAX6801UR29D2-T?
MAX6801UR29D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR29D2-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 MAX6801UR29D2-T?
For technical support, including MAX6801UR29D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR29D2-T requirements.
6.How does Aetrix verify that MAX6801UR29D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR29D2-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 MAX6801UR29D2-T meets industry standards.
7.What is the process for return or replacement of MAX6801UR29D2-T?
All MAX6801UR29D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR29D2-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 MAX6801UR29D2-T part is unused and in its original packaging.
Return procedure for MAX6801UR29D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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