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Analog Devices Inc./Maxim Integrated MAX6826MUT+T
- Part No.:
- MAX6826MUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6826MUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
MAX6826MUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (e.g., +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-up/brownout reset assertion.
For engineers reviewing the MAX6826MUT+T datasheet, MAX6826MUT+T pinout, MAX6826MUT+T application, or MAX6826MUT+T equivalent, key selection concerns include dual-supply monitoring capability, push-pull active-low RESET output, guaranteed reset validity down to VCC = +1.0V, immunity to short negative VCC transients, and compatibility with low-voltage embedded systems requiring stable reset timing across -40°C to +125°C.
Technical Context
The MAX6826MUT+T integrates two independent voltage monitors: one factory-trimmed VCC threshold (3.08V nominal, ±3% over temperature), and a high-impedance RESET IN comparator with 0.63V typical threshold for external resistor-divider configuration. It employs internal 50kΩ MR pullup and a 1.6s watchdog timer cleared by WDI edge transitions.
Reset assertion occurs on VCC drop below threshold, MR low, or watchdog timeout; reset remains asserted for ≥140ms after recovery. The push-pull RESET output drives low during reset and sources 0.8×VCC when high (ISOURCE = 200µA), with VOL ≤ 0.3V at ISINK = 50µA - enabling direct interface with µP reset inputs without external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (nominal), ±3% over -40°C to +125°C - sets primary supply brownout detection point |
| RESET IN Threshold | 0.63V (typical), adjustable via external divider - enables monitoring of secondary supplies as low as 0.6V |
| Reset Timeout Period | 140ms (min), 200ms (typ), 280ms (max) - ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s (nominal), 1.12–2.4s range over temp - provides software execution supervision with margin |
| Operating Voltage Range | +1.2V to +5.5V (over full temp) - supports operation down to ultra-low VCC while maintaining reset validity |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor in most µP interfaces |
| Supply Current (ICC) | 7–25µA over temp - enables long battery life in portable applications |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output - asserts low during fault conditions and holds for timeout period |
| 2 | GND | Ground reference for all internal comparators and logic - must be low-impedance connection |
| 3 | MR | Manual reset input, active-low, internally pulled up to VCC with 50kΩ - momentary GND connection forces reset |
| 4 | WDI | Watchdog input - rising or falling edge clears 1.6s timer; unconnected or three-stated disables watchdog |
| 5 | RESET IN | User-adjustable monitor input - high-impedance node referenced to 0.63V internal threshold |
| 6 | VCC | Main supply input - powers device and defines operating range; monitored for primary reset condition |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Factory-trimmed VCC threshold + user-configurable RESET IN for second supply - supports multivoltage system reliability |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior even during deep brownout - critical for fail-safe embedded control |
| No external components required | Internal MR pullup, precision thresholds, and timeout generation eliminate discrete BOM items and layout area |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches down to 100mV below threshold - avoids spurious resets in noisy power environments |
| Small 6-pin SOT23 footprint | 0.95mm × 1.6mm body size - enables integration into space-constrained portable and wearable designs |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Power management in handheld medical devices with dual Li-ion cell and LDO-regulated logic rails. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and auxiliary 1.8V core supply; asserts reset if either drops below threshold during battery discharge. Use Value: Prevents firmware corruption during brownout by holding µP in reset until both supplies stabilize post-recovery. | Use Scenario: Industrial PLC module with ARM Cortex-M4 and isolated I/O power domains. IC Role / Device Role / Timing Role: Supervises 3.3V I/O supply and 1.2V core supply via RESET IN divider; integrates manual reset and watchdog for firmware safety. Use Value: Enables single-chip dual-rail monitoring with 140ms timeout - reduces component count vs. discrete supervisors. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with FPGA, ADC, and analog front-end powered from multiple regulated rails. IC Role / Device Role / Timing Role: Tracks 2.5V analog supply and 1.5V FPGA core using RESET IN; uses WDI to verify real-time processing loop execution. Use Value: Combines precise voltage supervision and software watchdog in one 6-pin package - simplifies thermal and layout design. | Use Scenario: Automotive-grade telematics unit requiring ASIL-B–compatible reset assurance. IC Role / Device Role / Timing Role: Primary supervisor for 3.08V MCU supply; guarantees reset assertion down to VCC = +1.0V and immune to transient noise. Use Value: Meets functional safety requirements for deterministic reset under marginal supply conditions without external circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827MUT+T | Identical pinout and features except active-high push-pull RESET output | Requires µP with active-high reset input; incompatible with standard active-low reset pins without inversion | Select only when target µP specifies active-high reset assertion |
| TPS3808G30DBVR | Single-supply monitor (3.0V threshold), no RESET IN adjustability, 200ms timeout, SOT23-6 | Lacks secondary supply monitoring and manual reset - suitable only for basic single-rail applications | Choose when dual monitoring is unnecessary and cost optimization is prioritized over feature set |
Compared with MAX6826MUT+T, MAX6827MUT+T offers identical supervision functionality but inverted RESET polarity, while TPS3808G30DBVR reduces complexity and cost by omitting RESET IN and manual reset - making MAX6826MUT+T the only option supporting true dual-rail, user-adjustable, and fully featured supervision in this footprint.
Availability
MAX6826MUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across industrial temperature ranges.
Supply support for MAX6826MUT+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 delivers dual-supply microprocessor supervision with integrated watchdog and manual reset in ultra-small SOT23 packages - engineered specifically for space- and power-constrained embedded systems needing robust power-on-reset and brownout protection.
FAQ
What is the exact VCC reset threshold voltage for MAX6826MUT+T?
The MAX6826MUT+T has a factory-trimmed VCC reset threshold of 3.08V (typical), with guaranteed range of 2.97V to 3.17V over -40°C to +125°C. This value corresponds to the "T" suffix in the MAX6826_ _T designation and is specified in the Electrical Characteristics table under VTH parameter for MAX68_ _T versions. The threshold exhibits 60ppm/°C temperature coefficient and includes 2×VTH hysteresis.
Does MAX6826MUT+T support monitoring of a secondary voltage lower than 0.9V?
Yes, the MAX6826MUT+T supports monitoring secondary voltages as low as 0.6V using its RESET IN pin, which has a typical internal threshold of 0.63V. Unlike MAX6829–MAX6831 variants that monitor fixed VCC2 rails down to 0.9V, the MAX6826MUT+T uses an external resistor divider on RESET IN to scale higher voltages down to the 0.63V reference - enabling sub-0.9V supply supervision not possible with factory-trimmed VCC2 inputs.
What is the function of the WDI pin on MAX6826MUT+T and how is it configured?
The WDI (Watchdog Input) pin on MAX6826MUT+T accepts rising or falling edges to clear the internal 1.6s watchdog timer. If WDI remains static (high or low) beyond the timeout period, a reset is asserted. To disable the watchdog, leave WDI unconnected or drive it with a three-stated buffer - the internal driver then cycles low-high-low every ~1.4s, preventing timeout. Pulse width must exceed 50ns, and input levels follow standard CMOS thresholds (0.3×VCC/0.7×VCC).
Can MAX6826MUT+T operate reliably at VCC = +1.2V?
Yes, MAX6826MUT+T is fully specified to operate down to VCC = +1.2V over the full -40°C to +125°C temperature range, with guaranteed reset validity and functional timing. Its absolute minimum operating voltage is +1.0V, and all electrical characteristics - including RESET output drive strength, threshold accuracy, and watchdog timing - remain within datasheet limits at +1.2V. This enables use in ultra-low-power applications such as energy-harvesting sensors.
What is the maximum load current the RESET output of MAX6826MUT+T can sink?
The RESET output of MAX6826MUT+T can sink up to 3.2mA while maintaining VOL ≤ 0.4V (at VCC ≥ 4.25V), and 1.2mA at VCC ≥ 2.55V with VOL ≤ 0.3V. These values are specified in the Electrical Characteristics table under "RESET Output LOW (Push-Pull or Open-Drain)" parameter. The push-pull architecture ensures robust drive capability without external pullup resistors, supporting direct connection to most µP reset inputs.
MAX6826MUT+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:
- 4.38V, 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+T FAQ
1.How can I place an order for MAX6826MUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6826MUT+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 MAX6826MUT+T reliable?
The price and inventory of MAX6826MUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6826MUT+T is usually 5 days.
3.What payment methods are accepted for MAX6826MUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6826MUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6826MUT+T?
MAX6826MUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6826MUT+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 MAX6826MUT+T?
For technical support, including MAX6826MUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6826MUT+T requirements.
6.How does Aetrix verify that MAX6826MUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6826MUT+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 MAX6826MUT+T meets industry standards.
7.What is the process for return or replacement of MAX6826MUT+T?
All MAX6826MUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6826MUT+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 MAX6826MUT+T part is unused and in its original packaging.
Return procedure for MAX6826MUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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