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Analog Devices Inc./Maxim Integrated MAX6801UR26D3+T
- Part No.:
- MAX6801UR26D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR26D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,609
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Product details
Overview
MAX6801UR26D3+T from Maxim Integrated is a precision 2.63V reset supervisor IC with push/pull active-low RESET output, 100ms minimum timeout, and guaranteed operation down to VCC = 0.7V. It monitors 2.85V–5.0V power supplies in microprocessor systems, asserts reset during brownout/power-up, and maintains reset for ≥100ms after VCC recovers - used in industrial controllers and battery-powered instrumentation.
For engineers reviewing the MAX6801UR26D3+T datasheet, MAX6801UR26D3+T pinout, MAX6801UR26D3+T application, or MAX6801UR26D3+T equivalent, key selection criteria include reset threshold accuracy (±1.8% at +25°C), ultra-low 4µA supply current, SOT23-3 package compatibility, and push/pull drive capability supporting direct interface to µP reset inputs without external pullup.
Technical Context
The MAX6801UR26D3+T implements a factory-trimmed bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.63V ±1.8%, triggering an internally timed 100ms (min) reset pulse. Its push/pull output drives low actively and high actively, eliminating need for external pullup resistors.
Reset assertion is guaranteed functional down to VCC = 0.7V across –40°C to +125°C, and the comparator rejects transients ≤30µs at 100mV overdrive. The BiCMOS process ensures stable performance with <3% threshold drift over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.8% at +25°C; ensures reliable brownout detection for 2.85V logic rails |
| Reset Timeout | 100ms (min); holds µP in reset long enough for power stabilization and oscillator startup |
| Supply Current | 4µA typical at +3.0V; enables multi-year battery life in portable monitoring devices |
| Operating Voltage Range | 0.7V to 5.5V; supports valid reset assertion even during deep brownout or partial power loss |
| Output Type | Push/pull active-low RESET; drives low to 0.4V @ 50µA, eliminates external pullup resistor |
| Temperature Range | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| VCC Transient Immunity | Rejects ≤30µs negative glitches at 100mV overdrive; prevents false resets in noisy power systems |
Pinout & Package
MAX6801UR26D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized 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 ≥100ms after recovery; interfaces directly to µP reset pin |
| 3 (VCC) | Supply voltage input | Monitored rail input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±1.8% tolerance at +25°C and ±3% over –40°C to +125°C - eliminates manual calibration |
| Ultra-low quiescent current | 4µA at +3.0V - reduces standby power in always-on battery-backed systems |
| Guaranteed reset validity to 0.7V | RESET output remains functional down to VCC = 0.7V - ensures deterministic behavior during deep brownout |
| No external components required | Self-contained reset generation with integrated timer and comparator - reduces BOM count and layout area |
| Transient-immune comparator | Rejects fast VCC glitches ≤30µs - prevents spurious resets in electrically noisy environments |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 3.3V/5V rails. IC Role / Device Role / Timing Role: Monitors main VCC rail and asserts active-low RESET to hold CPU in safe state during undervoltage events. Use Value: Prevents corrupted I/O writes and firmware execution errors by enforcing ≥100ms reset hold time after power recovery. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries with long sleep cycles. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output and triggers controlled restart when battery voltage drops below 2.63V. Use Value: Enables >5-year battery life via 4µA supply current and eliminates false wakeups from transient noise. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
Use Scenario: Portable ultrasound or glucose meters requiring FDA-compliant power sequencing. IC Role / Device Role / Timing Role: Provides fail-safe reset signal to ARM Cortex-M microcontroller during cold-start and low-battery conditions. Use Value: Ensures deterministic boot state with ±1.8% threshold accuracy and operation down to 0.7V VCC. |
Use Scenario: Under-dash modules exposed to wide temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Supervises 5V system rail and asserts RESET during ignition cycling and battery disconnect events. Use Value: Guarantees reset functionality across –40°C to +125°C and rejects ≤30µs supply glitches per ISO 7637-2. |
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 | 2.93V reset threshold, 100ms timeout, same SOT23-3 package and push/pull output | Higher threshold better suited for 3.3V systems; less margin for 2.85V rails | Select when supervising 3.3V logic with tighter VTH tolerance requirement (±1.5%) |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout, higher 12µA ICC, same push/pull output | Designed for TI ecosystem integration; lacks sub-1V operation guarantee | Prefer when using TI power management ICs and 3.3V rail stability is primary concern |
Compared with MAX809TRD3+T and TPS3808G33DBVR, MAX6801UR26D3+T offers the lowest valid operating voltage (0.7V), tightest brownout margin for 2.85V systems, and lowest quiescent current - making it optimal for ultra-low-power and wide-VCC-range applications where deep brownout detection is critical.
Availability
MAX6801UR26D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and medical handheld devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6801UR26D3+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 computing applications - emphasizing reliability, low power, and integration.
The MAX6800/MAX6801/MAX6802 family delivers cost-effective, single-function µP reset supervision with factory-trimmed thresholds and minimal external components - targeting space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6801UR26D3+T and how tightly is it specified?
The MAX6801UR26D3+T has a nominal reset threshold of 2.63V, factory-trimmed to ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This precision ensures consistent brownout detection across temperature and supply variations without external calibration - critical for 2.85V logic systems where margin is narrow. The MAX6801UR26D3+T achieves this via laser-trimmed bandgap references in its BiCMOS process.
Does MAX6801UR26D3+T require an external pullup resistor on the RESET pin?
No, MAX6801UR26D3+T does not require an external pullup resistor because it features a push/pull output stage. The RESET pin actively drives low during fault conditions and actively drives high when VCC is above threshold - delivering VOH ≥0.8×VCC at 500µA source current. This eliminates BOM cost and layout area associated with pullup resistors, unlike open-drain alternatives such as the MAX6802UR26D3+T.
What is the minimum VCC voltage at which MAX6801UR26D3+T guarantees correct RESET output behavior?
MAX6801UR26D3+T guarantees correct RESET output behavior down to VCC = 0.7V across the full –40°C to +125°C temperature range. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where supply voltage range is specified as 0.7V to 5.5V for MAX6800/MAX6801. This capability ensures deterministic reset assertion during deep brownout events where other supervisors may fail.
How long does the RESET signal remain asserted after VCC rises above the 2.63V threshold in MAX6801UR26D3+T?
In MAX6801UR26D3+T, the RESET signal remains asserted for a minimum of 100ms after VCC rises above the 2.63V threshold. This timeout is factory-programmed and specified as 100ms (min), 150ms (typ), and 200ms (max) in the Electrical Characteristics table. The internal timer ensures sufficient hold time for microprocessor clock stabilization and peripheral initialization before release.
Is MAX6801UR26D3+T pin-compatible with other common reset supervisors like MAX809 or MAX6326?
Yes, MAX6801UR26D3+T is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 families in the SOT23-3 package - sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. This allows drop-in replacement in existing layouts without PCB modification, provided the reset threshold (2.63V) and timeout (100ms) meet system requirements. The MAX6801UR26D3+T maintains the same footprint and thermal profile as these legacy parts.
MAX6801UR26D3+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:
- 2.63V
- 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
MAX6801UR26D3+T FAQ
1.How can I place an order for MAX6801UR26D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR26D3+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 MAX6801UR26D3+T reliable?
The price and inventory of MAX6801UR26D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR26D3+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR26D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR26D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR26D3+T?
MAX6801UR26D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR26D3+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 MAX6801UR26D3+T?
For technical support, including MAX6801UR26D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR26D3+T requirements.
6.How does Aetrix verify that MAX6801UR26D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR26D3+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 MAX6801UR26D3+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR26D3+T?
All MAX6801UR26D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR26D3+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 MAX6801UR26D3+T part is unused and in its original packaging.
Return procedure for MAX6801UR26D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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