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Analog Devices Inc./Maxim Integrated MAX6826MUT+
- Part No.:
- MAX6826MUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6826MUT+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,427
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Product details
Overview
MAX6826MUT+ from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (1.8V–5.0V) and user-adjustable secondary voltage down to +0.63V via RESET IN pin, with 140ms min reset timeout, manual reset input (MR), and 1.6s watchdog timer - used for reliable power-up/brownout reset in portable battery-powered systems.
For engineers reviewing the MAX6826MUT+ datasheet, MAX6826MUT+ pinout, MAX6826MUT+ application, or MAX6826MUT+ equivalent, this page delivers verified circuit role, exact threshold behavior, push-pull RESET output configuration, guaranteed operation down to VCC = +1.0V, and real-world design implications for multivoltage embedded controllers.
Technical Context
The MAX6826MUT+ integrates two independent voltage monitors: one factory-set VCC threshold (suffix "M" = 4.38V nominal at -40°C to +85°C) and a high-impedance RESET IN comparator with 0.63V typical trip point for external resistor-divider programming. It features an internal 50kΩ MR pullup, glitch-immune WDI with 50ns pulse detection, and a reset timeout delay generator with ±60ppm/°C threshold drift.
Its push-pull RESET output drives high (0.8×VCC) when deasserted and low (≤0.3V at ISINK ≤3.2mA) when asserted, supporting direct interface to µP reset pins without external pullups. The device operates across -40°C to +125°C and draws only 7–25µA ICC depending on VCC and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 4.38V nominal (M-suffix), ±0.15V over -40°C to +125°C - sets primary supply brownout detection level |
| RESET IN Threshold | 0.63V typical, ±0.015V hysteresis - enables precise user-defined secondary voltage monitoring down to 0.6V |
| Reset Timeout Period | 140ms minimum - ensures stable µP initialization after supply recovery before release |
| Watchdog Timeout | 1.6s nominal (1.12–2.4s over temp) - provides software execution supervision with edge-triggered clearing |
| Supply Current (ICC) | 7µA typ at +3.6V / +25°C; 25µA max at -40°C to +125°C - enables ultra-low-power battery operation |
| Operating Voltage Range | +1.2V to +5.5V (VCC), valid reset assertion guaranteed down to +1.0V - supports deep brownout detection |
| Output Type | Active-low push-pull RESET - eliminates need for external pullup resistor on reset line |
Pinout & Package
MAX6826MUT+ uses a 6-pin SOT23 package (U6+1 outline, land pattern 90-0175), RoHS-compliant, with 1.0mm pitch and thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during VCC/VCC2/RESET IN fault, MR low, or WDI timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC; 1µs minimum pulse width required |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; unconnected disables watchdog |
| 5 | RESET IN | User-adjustable monitor input; 0.63V threshold enables external resistor-divider for secondary voltage sensing |
| 6 | VCC | Primary supply input; powers internal circuitry and defines logic levels for MR/WDI/RESET |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring | Simultaneous VCC (4.38V) and user-programmable RESET IN (0.63V) thresholds enable multivoltage system supervision |
| No external components required | Internal pullup on MR, precision bandgap references, and integrated timeout generator eliminate discrete timing parts |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches of 100mV below threshold without spurious reset - reduces false triggers in noisy environments |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset assertion even during deep brownout, critical for fail-safe embedded control |
| Low quiescent current | 7µA typical ICC at +3.6V allows >10-year battery life in always-on portable instrumentation |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Power management in handheld medical meters with Li-ion battery and dual-rail (3.3V/1.8V) MCU subsystems. IC Role / Device Role: Dual-supply supervisor asserting reset if main rail drops below 4.38V or core rail falls below 1.8V (via RESET IN divider). Use Value: Prevents corrupted EEPROM writes during battery sag by holding µP in reset until both rails stabilize above thresholds. |
Use Scenario: Industrial PLC module with ARM Cortex-M4, requiring guaranteed boot integrity after cold start or AC dropout. IC Role / Device Role: Primary VCC monitor and watchdog supervisor ensuring firmware executes only after stable 3.3V and 1.2V supplies are confirmed. Use Value: Eliminates need for separate POR and watchdog ICs, reducing BOM count and PCB area in space-constrained control modules. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Precision digital multimeter with auto-ranging analog front-end powered by isolated 5V and 2.5V rails. IC Role / Device Role: Monitors 5V supply (VCC) and scaled 2.5V reference (via RESET IN) to detect simultaneous rail collapse. Use Value: Enables single-chip fault detection for dual-rail analog subsystems, avoiding measurement errors due to partial power loss. |
Use Scenario: Automotive body controller where µP must never execute invalid code during ignition cycling. IC Role / Device Role: Supervises 5V microcontroller supply and 3.3V CAN transceiver rail using factory VCC threshold and external divider on RESET IN. Use Value: Provides AEC-Q100-aligned reliability (per operating temp range -40°C to +125°C) with no external timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827MUT+ | Same package and pinout; active-high push-pull RESET output instead of active-low | Requires inverted reset logic handling in µP firmware or external inverter | Select when system architecture mandates active-high reset assertion |
| TPS3808G18DBVR | Single-supply monitor (1.8V threshold only); no RESET IN or watchdog; 200ms timeout; 1.6µA ICC | Lacks dual-monitoring and watchdog capability; suitable only for basic VCC-only supervision | Choose only if secondary voltage monitoring and software watchdog are unnecessary |
Compared with MAX6826MUT+, MAX6827MUT+ offers identical supervision functionality but inverted reset polarity, while TPS3808G18DBVR reduces feature set to single-rail monitoring with lower power - neither is pin-compatible, and both require layout or firmware adaptation.
Availability
MAX6826MUT+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6826MUT+ 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 demanding industrial, automotive, and computing applications, with emphasis on power efficiency and reliability.
The MAX6826–MAX6831 family was engineered specifically for dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed and user-adjustable thresholds in minimal 6-pin SOT23 footprint.
FAQ
What is the exact VCC reset threshold voltage for MAX6826MUT+?
The MAX6826MUT+ has an M-suffix threshold of 4.38V nominal at -40°C to +85°C, with guaranteed range 4.22V to 4.53V over -40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under VTH for MAX68__M devices. The MAX6826MUT+ does not monitor VCC2; its second monitor is the user-adjustable RESET IN pin.
Does MAX6826MUT+ support monitoring a secondary voltage like 2.5V or 1.8V?
Yes - the MAX6826MUT+ uses its RESET IN pin (Pin 5) with a 0.63V internal threshold to monitor secondary voltages. By connecting an external resistor divider (e.g., R1=3.9kΩ, R2=1.0kΩ), the MAX6826MUT+ can reliably supervise 2.5V (trip at 2.49V) or 1.8V (trip at 1.79V). This is explicitly supported per the Adjustable Reset Thresholds section and Figure 5 in the datasheet.
What type of RESET output does MAX6826MUT+ provide?
The MAX6826MUT+ provides an active-low push-pull RESET output (Pin 1), as confirmed in the Pin Configuration diagram and Selector Guide. It drives low (≤0.3V) when asserted and high (≥0.8×VCC) when deasserted - eliminating the need for an external pullup resistor unlike open-drain alternatives such as MAX6828MUT+.
Can MAX6826MUT+ operate reliably at VCC = +1.2V?
Yes - the MAX6826MUT+ is fully specified to operate from VCC = +1.2V to +5.5V over -40°C to +125°C, and its reset function remains valid down to VCC = +1.0V. This is guaranteed per Absolute Maximum Ratings and Electrical Characteristics tables, enabling use in ultra-low-voltage applications such as energy-harvesting sensors.
How does the watchdog timer in MAX6826MUT+ work, and what is its timeout period?
The MAX6826MUT+ watchdog timer asserts reset if the WDI pin (Pin 4) remains static (high or low) for longer than 1.6s nominal (1.12–2.4s over temperature). It clears on any rising or falling edge at WDI, or during reset assertion. The timer is disabled if WDI is left unconnected or driven by a three-stated buffer, per the Watchdog Input section.
MAX6826MUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.38V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6826MUT+ FAQ
1.How can I place an order for MAX6826MUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6826MUT+ 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 MAX6826MUT+ reliable?
The price and inventory of MAX6826MUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6826MUT+ is usually 5 days.
3.What payment methods are accepted for MAX6826MUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6826MUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6826MUT+?
MAX6826MUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6826MUT+ 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 MAX6826MUT+?
For technical support, including MAX6826MUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6826MUT+ requirements.
6.How does Aetrix verify that MAX6826MUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6826MUT+ 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 MAX6826MUT+ meets industry standards.
7.What is the process for return or replacement of MAX6826MUT+?
All MAX6826MUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6826MUT+, 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 MAX6826MUT+ part is unused and in its original packaging.
Return procedure for MAX6826MUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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