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Analog Devices Inc./Maxim Integrated MAX6826LUT+T
- Part No.:
- MAX6826LUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6826LUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:14,050
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Product details
Overview
MAX6826LUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (4.63V threshold) and user-adjustable secondary voltage via RESET IN pin (0.63V internal reference), with manual reset input, 1.6s watchdog timeout, and 140ms min reset timeout delay-used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6826LUT+T datasheet, MAX6826LUT+T pinout, MAX6826LUT+T application, or MAX6826LUT+T equivalent, key selection considerations include its push-pull active-low RESET output, guaranteed reset validity down to VCC = +1.0V, immunity to short negative VCC transients, and support for multivoltage system monitoring with no external components required.
Technical Context
The MAX6826LUT+T implements dual-supply supervision using independent comparators: one for factory-trimmed VCC threshold (4.63V ±30mV over -40°C to +125°C), another for user-configurable RESET IN (0.63V typical, ±5mV hysteresis). It integrates a 1.6s watchdog timer cleared by WDI edge transitions and a 140ms minimum reset timeout delay generator.
Its push-pull RESET output drives low during fault conditions (VCC < VTH, RESET IN < 0.63V, MR low, or WDI timeout) and returns high after timeout; MR features internal 50kΩ pullup and 200ns propagation delay; WDI accepts CMOS-level inputs and tolerates up to 160µA sink current when driven high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V (±30mV over -40°C to +125°C); ensures reliable detection of +5V rail brownout before µP malfunction. |
| RESET IN Threshold | 0.63V (±15mV, 2.5mV hysteresis); enables precise monitoring of sub-1V supplies via external resistor divider. |
| Reset Timeout Period | 140ms minimum; guarantees sufficient hold time for µP initialization across full temperature range. |
| Watchdog Timeout | 1.6s nominal (0.8–2.6s over -40°C to +125°C); provides robust software execution monitoring without external timing components. |
| VCC Operating Range | +1.2V to +5.5V (full temp range); supports operation during deep brownout while maintaining valid reset assertion. |
| Supply Current | 30µA max at +125°C, VCC = +5.5V; enables multi-year battery life in portable applications. |
| Output Type | Active-low push-pull RESET; eliminates need for external pullup and interfaces directly with standard µP reset inputs. |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free.
| 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 WDI timeout; drives high post-timeout. |
| 2 | GND | Ground reference for all internal comparators, timers, and I/O; requires low-impedance connection to system ground plane. |
| 3 | MR | Manual reset input (active-low); internally pulled up to VCC (50kΩ); 200ns delay ensures noise immunity without external RC. |
| 4 | WDI | Watchdog input; edge-sensitive (rising/falling); clears 1.6s timer on transition; disabled if left floating or three-stated. |
| 5 | RESET IN | User-adjustable monitor input; high-impedance (±100nA leakage); 0.63V internal reference enables sub-1V supply monitoring. |
| 6 | VCC | Main supply input; powers all circuitry and defines logic levels; valid operation guaranteed down to +1.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Factory-trimmed VCC threshold (4.63V) + user-adjustable RESET IN (0.63V ref) enable simultaneous supervision of core and I/O rails. |
| No external components required | Integrated comparators, timer, pullup, and hysteresis eliminate discrete resistors, capacitors, and logic-reducing BOM count and PCB area. |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior during severe brownout, preventing µP lockup or undefined state entry. |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches down to 100mV below threshold without spurious reset-critical for noisy power environments. |
| 1.6s watchdog with edge-triggered clear | Prevents software hang detection failure; timer resets only on WDI edge-not level-avoiding false clears in stuck-loop scenarios. |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Power management in handheld medical devices with dual Li-ion cell input and 3.3V/1.8V regulated rails. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and adjustable 1.2V core voltage; asserts reset within 20µs of VCC drop below 4.63V. Use Value: Prevents firmware corruption during battery depletion by guaranteeing reset before µP enters unstable operating region. |
Use Scenario: Industrial PLC controller with isolated I/O modules requiring coordinated power-up sequencing. IC Role / Device Role / Timing Role: Monitors 5V backplane supply and 2.5V FPGA configuration rail; provides 140ms reset hold time for FPGA bitstream loading. Use Value: Eliminates need for external RC timing network-reducing component count and improving thermal stability over temperature. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Precision digital multimeter with analog front-end powered from separate low-noise LDO. IC Role / Device Role / Timing Role: Uses RESET IN pin to monitor 1.5V analog supply via resistor divider; triggers reset if analog rail drops below 1.45V. Use Value: Ensures ADC reference stability by halting µP operation before analog section becomes non-linear. |
Use Scenario: Automotive body control module where µP must never execute invalid code due to supply disturbance. IC Role / Device Role / Timing Role: Provides fail-safe reset with 1.6s watchdog; WDI connected to µP GPIO toggled in main loop and critical subroutines. Use Value: Detects both infinite loops and subroutine hangs-reducing risk of uncontrolled actuator activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827LUT+T | Identical pinout and VCC threshold, but features active-high push-pull RESET output instead of active-low. | Requires inverted reset logic handling in µP firmware or external inverter; unsuitable for systems expecting active-low reset assertion. | Select MAX6827LUT+T only when µP reset input is active-high or system design accommodates polarity inversion. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no RESET IN pin, no watchdog timer, 200ms reset timeout. | Lacks dual-monitoring capability and software hang detection; suitable only for basic power-on reset in single-rail systems. | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage applications where watchdog and auxiliary monitoring are unnecessary. |
Compared with MAX6827LUT+T and TPS3808G33DBVR, the MAX6826LUT+T uniquely combines dual-supply monitoring, user-adjustable secondary threshold, and integrated watchdog in a 6-pin SOT23-enabling compact, robust supervision of complex multivoltage embedded systems without design compromises.
Availability
MAX6826LUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, critical µP monitoring, and multivoltage systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6826LUT+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 microprocessor supervision in space-constrained, battery-sensitive systems-delivering dual-rail monitoring, watchdog safety, and guaranteed operation down to 1.0V VCC in minimal 6-pin SOT23 footprint.
FAQ
What is the exact reset threshold voltage for MAX6826LUT+T?
The MAX6826LUT+T has a factory-trimmed VCC reset threshold of 4.63V, with tolerance of ±30mV over the full operating temperature range (-40°C to +125°C). This value is specified in the Electrical Characteristics table under "VCC Reset Threshold" for suffix 'L'. The RESET IN pin uses a fixed 0.63V internal reference for user-adjustable monitoring.
Does MAX6826LUT+T support monitoring a secondary voltage below 1V?
Yes, the MAX6826LUT+T supports sub-1V secondary voltage monitoring via its RESET IN pin, which has a precise 0.63V internal reference voltage and ±100nA input leakage. By connecting an external resistor divider, users can configure trip points as low as 0.63V or scale higher voltages-enabling supervision of 0.9V, 0.8V, or 0.65V rails commonly found in modern µP cores.
What type of reset output does MAX6826LUT+T provide?
The MAX6826LUT+T provides an active-low push-pull RESET output. When asserted, it drives low with VOL ≤ 0.3V at ISINK = 50µA (VCC ≥ 1.0V); when deasserted, it drives high with VOH ≥ 0.8 × VCC at ISOURCE = 200µA (VCC ≥ 1.8V). This eliminates the need for an external pullup resistor and ensures fast, rail-to-rail reset signaling.
How does the watchdog timer in MAX6826LUT+T function?
The MAX6826LUT+T watchdog timer has a nominal timeout period of 1.6s (0.8–2.6s over temperature). It is cleared only by rising or falling edges on the WDI pin-not by static logic levels-preventing false clears during software hangs. If WDI remains static beyond timeout, RESET asserts for the full 140ms+ reset period, ensuring deterministic recovery.
Is MAX6826LUT+T compatible with systems requiring reset assertion down to VCC = 1.0V?
Yes, the MAX6826LUT+T is explicitly guaranteed to maintain valid reset assertion down to VCC = +1.0V across the full -40°C to +125°C temperature range. Its internal bandgap reference and comparator architecture remain functional at this low supply voltage, ensuring reliable brownout protection even during deep discharge of battery-powered systems.
MAX6826LUT+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:
- 4.63V, 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
MAX6826LUT+T FAQ
1.How can I place an order for MAX6826LUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6826LUT+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 MAX6826LUT+T reliable?
The price and inventory of MAX6826LUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6826LUT+T is usually 5 days.
3.What payment methods are accepted for MAX6826LUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6826LUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6826LUT+T?
MAX6826LUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6826LUT+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 MAX6826LUT+T?
For technical support, including MAX6826LUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6826LUT+T requirements.
6.How does Aetrix verify that MAX6826LUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6826LUT+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 MAX6826LUT+T meets industry standards.
7.What is the process for return or replacement of MAX6826LUT+T?
All MAX6826LUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6826LUT+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 MAX6826LUT+T part is unused and in its original packaging.
Return procedure for MAX6826LUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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