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Analog Devices Inc./Maxim Integrated MAX6826ZUT+T
- Part No.:
- MAX6826ZUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6826ZUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6826ZUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (2.25V to 2.38V threshold) and user-adjustable secondary voltage down to 0.63V, with 140ms min reset timeout, manual reset input, and 1.6s watchdog timer - used in battery-powered embedded controllers requiring reliable brownout detection and system recovery.
For engineers reviewing the MAX6826ZUT+T datasheet, MAX6826ZUT+T pinout, MAX6826ZUT+T application, or MAX6826ZUT+T equivalent, this page delivers verified circuit role, exact reset thresholds, true watchdog timing, confirmed push-pull RESET output behavior, and validated alternative options for multivoltage µP monitoring systems.
Technical Context
The MAX6826ZUT+T implements dual-supply supervision using two independent comparators: one factory-trimmed for VCC at 2.32V (Z suffix), and a second high-impedance RESET IN comparator with 0.63V typical threshold for external resistor-divider monitoring. It integrates a 1.6s watchdog timer cleared on WDI edge transitions and a 140ms reset timeout delay generator.
Its push-pull RESET output asserts active-low when VCC falls below 2.32V, RESET IN drops below 0.63V, MR is pulled low, or watchdog times out - and remains asserted for ≥140ms after all conditions clear. Guaranteed operation down to VCC = +1.0V ensures reset validity during deep brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.24V to 2.40V (–40°C to +125°C); sets primary supply brownout detection point for 2.32V nominal systems |
| RESET IN Threshold | 0.610V to 0.650V (–40°C to +125°C); enables precise external voltage monitoring via resistor divider |
| Reset Timeout Period | 140ms minimum; ensures µP completes power stabilization before release from reset state |
| Watchdog Timeout Period | 1.12s to 2.60s (–40°C to +125°C); provides fail-safe software execution monitoring with temperature compensation |
| Supply Current (VCC = 3.6V) | 7µA to 25µA (–40°C to +125°C); supports ultra-low-power operation in portable/battery-powered equipment |
| Operating Voltage Range | +1.2V to +5.5V (–40°C to +125°C); allows use across wide range of logic supply rails including 1.8V, 2.5V, 3.3V, and 5V systems |
| RESET Output Type | Push-pull active-low; drives reset line directly without external pullup, compatible with standard µP reset inputs |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free, –40°C to +125°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC/VCC2/RESET IN fault, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and output driver |
| 3 | MR | Manual reset input (active-low); internal 50kΩ pullup; 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 comparator for external voltage sensing via resistor divider |
| 6 | VCC | Primary supply input; powers device and sets VCC reset threshold (2.32V for Z suffix) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring | Simultaneously supervises primary VCC (2.32V) and user-defined secondary voltage down to 0.63V |
| Guaranteed reset validity | RESET output remains functional down to VCC = +1.0V, ensuring reliability during severe brownout |
| No external components | Internal 50kΩ MR pullup, precision voltage references, and watchdog timer eliminate need for discrete parts |
| Immunity to VCC transients | Withstands negative VCC glitches ≤20µs at 100mV overdrive without false reset assertion |
| Low quiescent current | As low as 7µA at +3.6V and +25°C enables multi-year battery life in portable instrumentation |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical monitors powered by single Li-ion cell with 2.8V–4.2V range and 1.8V core logic rail. IC Role / Device Role: Primary supervisor for main 3.3V I/O supply and secondary monitor for 1.8V core via RESET IN divider. Use Value: Prevents firmware crash during battery sag by asserting reset before core voltage violates µP spec, using only 7µA supply current. |
Use Scenario: Industrial PLC controller with separate 5V analog front-end and 3.3V digital logic supplies. IC Role / Device Role: Dual-rail supervisor detecting undervoltage on both rails and enabling coordinated system reset. Use Value: Eliminates need for two discrete supervisors; 140ms timeout ensures stable power-up sequencing across mixed-voltage domains. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Precision handheld multimeter with real-time clock, ADC, and LCD display powered from regulated 2.5V and 1.8V rails. IC Role / Device Role: Monitors 2.5V supply directly and 1.8V rail via RESET IN pin using 100kΩ/220kΩ divider to set 1.8V trip point. Use Value: Enables accurate voltage threshold tuning without trimming resistors; 0.63V internal reference ensures ±1% trip accuracy over temperature. |
Use Scenario: Automotive-grade engine control unit requiring fail-safe reset under cold-crank conditions where VCC dips to 1.2V. IC Role / Device Role: Primary VCC supervisor with guaranteed reset assertion down to 1.0V and immunity to sub-20µs supply noise. Use Value: Maintains deterministic reset behavior during cranking transients where competing supervisors may miss faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827ZUT+T | Same VCC threshold (2.32V), but active-high push-pull RESET output instead of active-low | Requires inverted reset logic on µP side; incompatible with standard active-low reset inputs without level-shifting | Select only if target µP accepts active-high reset assertion or system design accommodates polarity inversion |
| MAX6829ZUT+T | Replaces RESET IN with factory-trimmed VCC2 monitor (2.313V threshold); no user-adjustable secondary input | Lacks flexibility for custom voltage monitoring; suited only for fixed dual-rail systems with known secondary supply | Choose when secondary supply is stable and known (e.g., 2.5V or 2.3V), eliminating need for external resistor network |
Compared with MAX6827ZUT+T and MAX6829ZUT+T, the MAX6826ZUT+T uniquely combines active-low push-pull RESET, user-adjustable secondary monitoring, and 2.32V primary threshold - making it the only option among the three that supports direct interface to standard µP reset pins while retaining full flexibility for arbitrary voltage supervision.
Availability
MAX6826ZUT+T 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 RoHS-compliant packaging.
Supply support for MAX6826ZUT+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 demanding industrial, automotive, and computing applications.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage, dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - emphasizing guaranteed operation down to 1.0V, minimal external components, and robust transient immunity.
FAQ
What is the exact VCC reset threshold voltage for MAX6826ZUT+T across temperature?
The MAX6826ZUT+T has a VCC reset threshold of 2.24V (min) to 2.40V (max) over the full –40°C to +125°C operating range, with 2.32V typical at +25°C. This Z-suffix threshold is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold" with conditions TA = –40°C to +125°C.
Does MAX6826ZUT+T support monitoring a 1.2V supply as the secondary voltage?
Yes, MAX6826ZUT+T supports monitoring a 1.2V supply using its RESET IN pin. With a typical internal threshold of 0.63V, a resistor divider (e.g., 100kΩ top, 110kΩ bottom) scales 1.2V to ~0.63V at the pin. The datasheet confirms RESET IN operation down to 0.610V (min) at –40°C to +125°C, enabling accurate 1.2V supervision.
What is the watchdog timeout period tolerance for MAX6826ZUT+T?
The watchdog timeout period for MAX6826ZUT+T is 1.12s (min) to 2.60s (max) across –40°C to +125°C, with 1.6s nominal. This variation is explicitly listed in the Electrical Characteristics table under "Watchdog Timeout Period" and reflects process and temperature dependencies inherent to the internal RC timer.
Is the RESET output of MAX6826ZUT+T push-pull or open-drain?
The RESET output of MAX6826ZUT+T is push-pull active-low, as confirmed by the Selector Guide (MAX6826 row shows "✔" under "ACTIVE-LOW RESET") and Pin Description (Pin 1 function states "Active-Low Push-Pull Reset Output"). It does not require an external pullup resistor and can sink up to 3.2mA at VCC ≥ 4.25V.
Can MAX6826ZUT+T operate reliably when VCC drops to 1.1V?
Yes, MAX6826ZUT+T is guaranteed to assert a valid RESET output down to VCC = +1.0V, per the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.1V, the device continues full supervision functionality including VCC threshold detection, RESET IN monitoring, MR response, and watchdog timing - critical for brownout recovery.
MAX6826ZUT+T 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:
- 2.32V, 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
MAX6826ZUT+T FAQ
1.How can I place an order for MAX6826ZUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6826ZUT+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 MAX6826ZUT+T reliable?
The price and inventory of MAX6826ZUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6826ZUT+T is usually 5 days.
3.What payment methods are accepted for MAX6826ZUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6826ZUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6826ZUT+T?
MAX6826ZUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6826ZUT+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 MAX6826ZUT+T?
For technical support, including MAX6826ZUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6826ZUT+T requirements.
6.How does Aetrix verify that MAX6826ZUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6826ZUT+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 MAX6826ZUT+T meets industry standards.
7.What is the process for return or replacement of MAX6826ZUT+T?
All MAX6826ZUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6826ZUT+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 MAX6826ZUT+T part is unused and in its original packaging.
Return procedure for MAX6826ZUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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