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Analog Devices Inc./Maxim Integrated MAX6827WUT
- Part No.:
- MAX6827WUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6827WUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6827WUT from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, designed to monitor primary supply (VCC) and user-adjustable secondary input (RESET IN), assert active-high push-pull RESET, and provide manual reset and 1.6s watchdog timer functions. It guarantees valid reset operation down to VCC = +1.0V and supports systems with +1.53V to +2.0V primary supplies and secondary monitoring down to +0.63V.
For engineers reviewing the MAX6827WUT datasheet, MAX6827WUT pinout, MAX6827WUT application, or MAX6827WUT equivalent, this page delivers verified technical context, exact pin roles, real-world timing behavior, confirmed reset threshold accuracy, and validated alternative options for multivoltage embedded supervision.
Technical Context
The MAX6827WUT implements dual-supply supervision with independent comparators for VCC (factory-trimmed at 1.67V ±0.055V) and RESET IN (typical 0.63V threshold). Its internal 140ms minimum reset timeout delay and 1.6s watchdog timer are temperature-stable across –40°C to +125°C.
This device uses BiCMOS process technology (750 transistors), features an internal 50kΩ pullup on MR, accepts CMOS-level WDI transitions, and asserts RESET high during fault conditions-requiring no external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.67V (±0.055V) - factory-trimmed for +1.53V to +2.0V supply monitoring |
| RESET IN Threshold | 0.63V (typ) - enables user-adjustable secondary voltage monitoring via resistor divider |
| Reset Timeout Period | 140ms (min) - ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout | 1.6s (nominal) - detects µP lockup by requiring WDI edge within this window |
| Operating Temperature | –40°C to +125°C - qualified for automotive and industrial environments |
| Supply Current (VCC) | 30µA (max at –40°C to +125°C) - ultra-low quiescent current for battery-powered systems |
| RESET Output Type | Active-high push-pull - drives high without external pullup; sinks 3.2mA at VCC ≥ 4.25V |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free compatible (replaces "-T" with "+T" for RoHS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; asserts high during VCC undervoltage, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC; 1µs minimum pulse width |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; unconnected disables watchdog |
| 5 | RESET IN | User-adjustable secondary monitor input; 0.63V comparator threshold; high-impedance (>100MΩ) |
| 6 | VCC | Main supply input; powers internal circuitry and sets operating range (+1.53V to +2.0V for W suffix) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply supervision | Simultaneously monitors VCC (1.67V) and RESET IN (0.63V) - eliminates need for two discrete supervisors |
| No external components required | Internal pullup on MR, fixed thresholds, and integrated timing eliminate capacitors/resistors for basic reset generation |
| Immunity to VCC transients | Withstands negative VCC glitches ≤20µs at 100mV overdrive - avoids spurious resets in noisy power rails |
| Guaranteed operation to VCC = +1.0V | Valid RESET assertion maintained even as primary supply decays below typical LDO dropout - critical for graceful shutdown |
| Watchdog with edge-triggered clear | WDI accepts rising/falling edges (≥50ns wide); timer resets on any transition - robust against software hangs |
Applications
| Portable Power Management | Automotive Body Control Module |
|---|---|
|
Use Scenario: Battery-powered handheld instrument with dual-core SoC requiring coordinated reset of I/O and core rails during brownout. IC Role / Device Role / Timing Role: Supervises 1.8V I/O rail (via RESET IN divider) and 1.6V core rail (VCC), asserts active-high RESET to both domains simultaneously. Use Value: Prevents partial initialization by holding reset until both supplies exceed 1.67V and 0.63V thresholds, then maintaining it for ≥140ms. |
Use Scenario: Under-hood ECU exposed to load-dump transients and wide temperature swings (–40°C to +125°C). IC Role / Device Role / Timing Role: Monitors 1.67V bias rail derived from main 12V system; provides manual reset for service mode and watchdog supervision of firmware execution. Use Value: Immunity to short VCC dips (<20µs) prevents false resets during alternator switching; guaranteed operation to VCC = +1.0V ensures fail-safe shutdown. |
| Industrial PLC I/O Card | Medical Sensor Node |
|
Use Scenario: Modular PLC backplane with hot-swappable I/O modules needing deterministic reset sequencing. IC Role / Device Role / Timing Role: Uses MR pin to accept board-level reset command; WDI tied to FPGA heartbeat signal to detect firmware stalls. Use Value: 1.6s watchdog timeout aligns with FPGA configuration time; push-pull RESET drives optocoupler input directly without pullup. |
Use Scenario: Wearable biosensor with coin-cell battery and ultra-low-power MCU requiring sub-2µA sleep current. IC Role / Device Role / Timing Role: Supervises 1.67V regulator output and 0.63V reference-derived analog supply; leverages 30µA max ICC to minimize standby drain. Use Value: Enables reliable wake-from-reset after battery insertion or voltage recovery, with no external timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6826WUT | Active-low push-pull RESET output; identical VCC/RESET IN thresholds and timing | Requires inverted reset logic on µP side; incompatible with active-high reset inputs | Select when host µP accepts active-low reset and board layout already uses pull-down strategy |
| MAX6829WUT | Replaces RESET IN with factory-trimmed VCC2 monitor (1.665V); same VCC threshold and watchdog | Fixed secondary threshold eliminates resistor divider but loses flexibility for sub-1V monitoring | Choose when secondary supply is stable 1.6V rail and design prioritizes BOM simplification over adjustability |
Compared with MAX6827WUT, MAX6826WUT requires µP-level logic inversion and changes reset assertion polarity, while MAX6829WUT trades adjustable RESET IN capability for guaranteed VCC2 accuracy-making MAX6827WUT optimal where secondary voltage varies or falls below 0.9V.
Availability
MAX6827WUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, automotive systems, and industrial embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6827WUT 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 power, sensing, and interface applications, with deep expertise in supervisory and reliability-critical circuits.
The MAX6826–MAX6831 family was engineered specifically for multivoltage embedded systems needing simultaneous primary/secondary supply monitoring, manual reset, and watchdog supervision in space-constrained SOT23-6 packages.
FAQ
What is the exact VCC reset threshold voltage for MAX6827WUT?
The MAX6827WUT has a factory-trimmed VCC reset threshold of 1.67V, with a guaranteed range of 1.61V to 1.72V across –40°C to +125°C. This value is specified for the "W" suffix variant and applies only when VCC is within its rated operating range of +1.53V to +2.0V. The threshold exhibits 60ppm/°C temperature coefficient and 2×VTH hysteresis.
Does MAX6827WUT support active-high or active-low reset output?
The MAX6827WUT provides an active-high push-pull RESET output. When a fault occurs (VCC drop, MR low, or watchdog timeout), RESET goes high and remains high for the full reset timeout period (≥140ms). This differs from MAX6826WUT (active-low) and MAX6828WUT (open-drain), and eliminates need for external pullup resistors.
Can MAX6827WUT monitor a secondary voltage below 0.9V?
Yes - the MAX6827WUT includes a RESET IN pin with a fixed 0.63V (typ) internal comparator threshold, enabling monitoring of secondary voltages as low as ~0.63V using an external resistor divider. This capability is explicitly confirmed for MAX6826/MAX6827/MAX6828 variants and is not available on MAX6829–MAX6831, which use fixed VCC2 inputs.
What is the watchdog timeout period for MAX6827WUT, and how is it cleared?
The MAX6827WUT features a nominal 1.6s watchdog timeout period, with a guaranteed range of 0.80s to 2.60s across –40°C to +125°C. The internal timer is cleared by any rising or falling edge on the WDI pin, by assertion of MR, or by activation of the RESET output. Leaving WDI unconnected disables the watchdog function entirely.
Is MAX6827WUT qualified for automotive temperature range?
Yes - the MAX6827WUT is fully specified and tested over –40°C to +125°C, matching the AEC-Q100 Grade 2 temperature requirement for automotive under-hood applications. Its guaranteed reset validity down to VCC = +1.0V, immunity to short VCC transients, and BiCMOS process technology support reliable operation in harsh automotive environments.
MAX6827WUT 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:
- 1.67V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6827WUT FAQ
1.How can I place an order for MAX6827WUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6827WUT 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 MAX6827WUT reliable?
The price and inventory of MAX6827WUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6827WUT is usually 5 days.
3.What payment methods are accepted for MAX6827WUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6827WUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6827WUT?
MAX6827WUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6827WUT 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 MAX6827WUT?
For technical support, including MAX6827WUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6827WUT requirements.
6.How does Aetrix verify that MAX6827WUT is sourced from the original manufacturer or authorized distributors?
All MAX6827WUT 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 MAX6827WUT meets industry standards.
7.What is the process for return or replacement of MAX6827WUT?
All MAX6827WUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6827WUT, 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 MAX6827WUT part is unused and in its original packaging.
Return procedure for MAX6827WUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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