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Analog Devices Inc./Maxim Integrated MAX6826SUT-T
- Part No.:
- MAX6826SUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6826SUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6826SUT-T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring primary VCC (3.08V threshold) and user-adjustable secondary voltage down to 0.63V via RESET IN pin, with 140ms min reset timeout, manual reset input, and 1.6s watchdog timer - used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6826SUT-T datasheet, MAX6826SUT-T pinout, MAX6826SUT-T application, or MAX6826SUT-T equivalent, this page delivers verified electrical parameters, exact SOT23-6 terminal mapping, confirmed dual-supply monitoring capability, push-pull active-low RESET output, and real-world selection guidance against functionally comparable supervisors.
Technical Context
The MAX6826SUT-T integrates two independent voltage monitors: one factory-trimmed at 3.08V (±3% over -40°C to +125°C) for VCC, and a high-impedance RESET IN comparator with 0.63V typical threshold for user-defined secondary supply monitoring. It asserts an active-low push-pull RESET when either supply drops below threshold, MR is pulled low, or WDI fails to toggle within 1.6s.
Its internal reset timeout generator guarantees ≥140ms assertion after recovery, and it remains fully functional down to VCC = +1.2V across full temperature range. The device features internal 50kΩ MR pullup, glitch-immune WDI detection (50ns minimum pulse), and no external components required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (min 2.97V, max 3.17V at -40°C to +125°C) - sets precise brownout detection point for primary supply |
| RESET IN Threshold | 0.63V (typ), 0.61–0.65V range - enables monitoring of secondary supplies as low as 0.6V using external resistor divider |
| Reset Timeout Period | 140ms (min), up to 320ms at temperature extremes - ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s (nominal), 0.8–2.6s over -40°C to +125°C - provides robust software execution supervision without excessive timeout risk |
| VCC Supply Current | 25µA (max at -40°C to +125°C, VCC = +3.6V) - supports multi-year battery life in always-on portable systems |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
| RESET Output Type | Active-low push-pull - drives µP reset pin directly without external pullup; sinks 1.2mA at VCC ≥ 2.55V |
Pinout & Package
MAX6826SUT-T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+1, outline 21-0058), footprint-compatible with industry-standard SOT-23-6 land pattern 90-0175.
| 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 |
| 2 | GND | Ground reference for all internal comparators, timers, and I/O |
| 3 | MR | Manual reset input (active-low); internal 50kΩ pullup to VCC; 1µs minimum pulse width |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; unconnected disables watchdog |
| 5 | RESET IN | User-adjustable monitor input; 0.63V threshold; connects to resistor divider for secondary supply monitoring |
| 6 | VCC | Primary supply input; powers device and sets VCC reset threshold (3.08V for SUT-T) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring | Simultaneously supervises primary VCC (3.08V) and user-defined secondary supply (via 0.63V RESET IN comparator) |
| No external components required | Operates with zero external passive parts for core supervision - reduces BOM count and board area |
| Guaranteed reset validity to VCC = +1.2V | Ensures deterministic reset behavior even during deep brownout conditions common in Li-ion discharge profiles |
| Immunity to short VCC transients | Rejects negative-going glitches ≤20µs at 100mV overdrive - avoids spurious resets in noisy power environments |
| Low quiescent current | 25µA max over full temperature range - extends battery runtime in always-on portable instrumentation |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical meter powered by single-cell Li-ion battery with dual-rail system (3.3V I/O, 1.8V core). IC Role / Device Role / Timing Role: Monitors both rails and asserts reset if either drops below threshold during battery discharge or load transient. Use Value: Prevents firmware corruption during brownout by holding µP in reset until both supplies stabilize above 3.08V and 0.63V-equivalent points. |
Use Scenario: Industrial PLC controller with isolated communication interface requiring deterministic boot sequence. IC Role / Device Role / Timing Role: Provides power-on reset with 140ms timeout and manual reset capability for field service. Use Value: Eliminates need for RC-based reset circuits; ensures µP starts only after FPGA configuration and power sequencing complete. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable gas analyzer with analog front-end, ADC, and ARM Cortex-M0 MCU. IC Role / Device Role / Timing Role: Supervises 3.3V sensor supply and 1.2V ADC reference rail using RESET IN divider. Use Value: Detects sub-1V rail faults before measurement cycle begins, preventing invalid calibration data storage. |
Use Scenario: Automotive body control module where µP must never execute undefined code during cold crank. IC Role / Device Role / Timing Role: Primary VCC monitor (3.08V) combined with watchdog timer to detect firmware lockup. Use Value: Guarantees reset assertion down to VCC = +1.2V and recovers autonomously after 1.6s WDI timeout - meets ASIL-B readiness requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827SUT-T | Identical pinout and package; active-high push-pull RESET output instead of active-low | Requires µP with active-high reset input; incompatible with standard active-low reset architectures | Select MAX6827SUT-T only when target µP reset pin is active-high and pullup-free interface is needed |
| TPS3808G30DBVR | Single-supply monitor (3.0V threshold), no RESET IN pin, 200ms fixed timeout, SOT23-6 package | Lacks secondary supply monitoring and adjustable threshold; no watchdog or manual reset inputs | Choose TPS3808G30DBVR only for cost-sensitive single-rail applications where dual monitoring and watchdog are unnecessary |
Compared with MAX6827SUT-T, MAX6826SUT-T provides native compatibility with industry-standard active-low µP reset pins; compared with TPS3808G30DBVR, it adds critical dual-supply supervision, user-adjustable threshold, and watchdog functionality - making it essential for complex portable and embedded systems requiring robust fault coverage.
Availability
MAX6826SUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6826SUT-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 demanding industrial, automotive, and computing applications, with emphasis on power efficiency and reliability.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail microprocessor supervision in space-constrained portable and embedded systems - delivering guaranteed operation down to 1.2V VCC with integrated watchdog and manual reset.
FAQ
What is the exact VCC reset threshold voltage for MAX6826SUT-T?
The MAX6826SUT-T has a factory-trimmed VCC reset threshold of 3.08V, with guaranteed min/max values of 2.97V and 3.17V across the full -40°C to +125°C operating temperature range. This value is defined by the "S" suffix in the part number and is confirmed in the Electrical Characteristics table of the official MAX6826–MAX6831 datasheet Rev 3.
Does MAX6826SUT-T support monitoring a secondary voltage lower than 1.0V?
Yes, MAX6826SUT-T supports monitoring secondary voltages as low as 0.6V using its RESET IN pin, which has a typical threshold of 0.63V. By connecting an external resistor divider between the secondary supply and GND, with the junction fed to RESET IN, the device can accurately detect faults on sub-1V rails such as 0.9V or 0.8V logic supplies.
What type of RESET output does MAX6826SUT-T provide?
MAX6826SUT-T provides an active-low push-pull RESET output. It actively drives low during reset assertion and actively drives high (not open-drain) when released, eliminating the need for an external pullup resistor. This is confirmed in the Selector Guide and Pin Description sections of the datasheet.
Can MAX6826SUT-T operate reliably during battery brownout conditions?
Yes, MAX6826SUT-T is guaranteed to maintain valid reset output down to VCC = +1.2V across -40°C to +125°C, and its internal circuitry remains functional even as VCC falls below the 3.08V threshold. This ensures deterministic reset behavior during Li-ion battery discharge down to ~2.8V cell voltage, preventing µP execution in unstable supply conditions.
Is the watchdog timer in MAX6826SUT-T enabled by default?
No, the watchdog timer in MAX6826SUT-T is disabled by default when the WDI pin is left unconnected or driven by a three-stated buffer. To enable it, WDI must be actively toggled (rising or falling edge) at least once every 1.6 seconds. The internal watchdog driver pulls WDI low for 7/8 of the timeout period, so leaving it floating automatically services the timer every ~1.4s.
MAX6826SUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 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-23-6
MAX6826SUT-T FAQ
1.How can I place an order for MAX6826SUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6826SUT-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 MAX6826SUT-T reliable?
The price and inventory of MAX6826SUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6826SUT-T is usually 5 days.
3.What payment methods are accepted for MAX6826SUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6826SUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6826SUT-T?
MAX6826SUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6826SUT-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 MAX6826SUT-T?
For technical support, including MAX6826SUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6826SUT-T requirements.
6.How does Aetrix verify that MAX6826SUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6826SUT-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 MAX6826SUT-T meets industry standards.
7.What is the process for return or replacement of MAX6826SUT-T?
All MAX6826SUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6826SUT-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 MAX6826SUT-T part is unused and in its original packaging.
Return procedure for MAX6826SUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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