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Analog Devices Inc./Maxim Integrated MAX6827ZUT+
- Part No.:
- MAX6827ZUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6827ZUT+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
MAX6827ZUT+ from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, designed to monitor primary supply (VCC) at 2.25V–2.38V and secondary supply (VCC2) at 2.244V–2.388V across –40°C to +125°C, with push-pull active-high RESET output, manual reset input (MR), and 1.6s watchdog timeout - used in portable battery-powered equipment and multivoltage embedded systems.
For engineers reviewing the MAX6827ZUT+ datasheet, MAX6827ZUT+ pinout, MAX6827ZUT+ application, or MAX6827ZUT+ equivalent, this page delivers verified specifications, exact pin functions, real-world use cases for critical µP monitoring, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX6827ZUT+ integrates dual independent voltage monitors: one factory-trimmed VCC threshold (2.32V nominal, ±0.068V over temperature) and one factory-trimmed VCC2 threshold (2.313V nominal, ±0.075V over temperature), both guaranteed valid down to VCC = +1.2V. It features an internal 1.6s watchdog timer cleared by WDI edge transitions and a 140ms minimum reset timeout delay after all monitored voltages recover.
Its push-pull RESET output drives high (VOH ≥ 0.8 × VCC) when deasserted and low (VOL ≤ 0.3V) when asserted, supporting direct interface to µP reset inputs without external pullups. MR includes a 50kΩ internal pullup, and WDI accepts CMOS-level signals with 50ns pulse-width detection capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.25V to 2.38V (min/max over –40°C to +125°C); ensures reliable power-up reset for 2.5V I/O rails with margin. |
| VCC2 Threshold | 2.244V to 2.388V (min/max over –40°C to +125°C); factory-trimmed for accurate monitoring of secondary 2.5V or 2.3V supplies. |
| Reset Timeout Period | 140ms minimum; guarantees µP remains held in reset long enough for stable power rail settling. |
| Watchdog Timeout | 1.12s to 2.4s (min/max over –40°C to +85°C); provides robust software execution supervision with temperature-compensated timing. |
| RESET Output Type | Push-pull active-high; eliminates need for external pullup resistor and supports direct connection to µP reset pins requiring high-true assertion. |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments without derating. |
| VCC Supply Current | 30µA max at –40°C to +125°C (VCC = +3.6V); enables multi-year battery life in always-on portable instrumentation. |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant, surface-mountable with 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; asserts high during fault conditions (VCC/VCC2 undervoltage, MR low, or WDI timeout) and holds for ≥140ms after recovery. |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection to system ground plane. |
| 3 | MR | Manual reset input, active-low with 50kΩ internal pullup to VCC; pulling low forces reset regardless of supply status; debounced internally. |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; left floating or three-stated disables watchdog function. |
| 5 | VCC2 | Secondary supply input for factory-trimmed 2.313V monitor; connects directly to 2.5V or 2.3V rail being supervised. |
| 6 | VCC | Primary supply input for 2.32V threshold monitor; powers internal circuitry and defines logic levels for MR/WDI/RESET. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises primary (VCC) and secondary (VCC2) rails with separate, factory-trimmed thresholds - no external resistors required. |
| Guaranteed operation down to VCC = +1.2V | Ensures valid RESET assertion even during deep brownout events where VCC drops below typical logic thresholds. |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without false reset - critical for noisy switching power supply environments. |
| No external components required | Integrates pullup on MR, precision references, watchdog timer, and reset delay generator - reduces BOM count and PCB area. |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for µP reset hold time, ensuring deterministic boot sequence. |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical meters powered by single Li-ion cell with dual-rail PMIC (2.5V analog, 1.8V digital). IC Role / Device Role / Timing Role: MAX6827ZUT+ monitors both rails and asserts active-high RESET to ARM Cortex-M0 MCU until both supplies stabilize post-power-on. Use Value: Prevents firmware execution before ADC reference and core logic are fully powered, eliminating measurement corruption. |
Use Scenario: Industrial PLC controller with isolated 2.5V I/O supply and 3.3V logic supply. IC Role / Device Role / Timing Role: MAX6827ZUT+ supervises 2.5V I/O rail (VCC2) and 3.3V logic rail (VCC), triggering reset if either sags during ESD event or load step. Use Value: Maintains deterministic state machine behavior by holding µP in reset during transient supply disturbances. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with FPGA-based signal processing and 2.5V analog front-end. IC Role / Device Role / Timing Role: MAX6827ZUT+ uses VCC2 pin to supervise 2.5V analog supply while VCC monitors 3.3V FPGA core supply - both thresholds factory-trimmed for accuracy. Use Value: Eliminates need for external resistor dividers, reducing calibration drift and improving long-term measurement stability. |
Use Scenario: Automotive body control module with watchdog-critical firmware and dual 2.5V/1.8V supplies. IC Role / Device Role / Timing Role: MAX6827ZUT+ provides hardware-enforced reset via MR button and automatic watchdog supervision of main µP's WDI line. Use Value: Meets ISO 26262 ASIL-B diagnostic coverage requirements through independent voltage and software-execution monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6829ZUT+ | Same VCC/VCC2 thresholds and package, but features active-low open-drain RESET output instead of push-pull active-high. | Requires external pullup resistor; compatible only with µPs accepting active-low reset assertion. | Select MAX6829ZUT+ only when interfacing with legacy µPs requiring active-low reset signaling and open-drain bus sharing. |
| TPS3808G33DBVR | Single-supply supervisor (monitors only VCC), 3.3V fixed threshold, 200ms reset timeout, SOT23-6 package - no VCC2 or watchdog input. | Lacks dual-rail monitoring and watchdog functionality; suitable only for simpler single-rail systems. | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage applications where watchdog and secondary rail monitoring are unnecessary. |
Compared with MAX6829ZUT+, MAX6827ZUT+ eliminates external pullup needs and simplifies µP interface; compared with TPS3808G33DBVR, it adds essential dual-rail supervision and watchdog safety for complex embedded systems.
Availability
MAX6827ZUT+ 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 and long production lifecycles.
Supply support for MAX6827ZUT+ 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 industrial, automotive, and computing applications.
The MAX6826–MAX6831 family was engineered specifically for dual-rail µP supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed accuracy, wide temperature operation, and integrated watchdog functionality in SOT23.
FAQ
What is the exact VCC reset threshold voltage range for MAX6827ZUT+ over temperature?
The MAX6827ZUT+ has a VCC reset threshold of 2.25V (min) to 2.38V (max) across –40°C to +125°C, with a nominal value of 2.32V at +25°C. This range is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold (VCC Falling)" for suffix Z. The MAX6827ZUT+ maintains this accuracy without external calibration components.
Does MAX6827ZUT+ support monitoring a secondary supply, and what is its threshold range?
Yes, MAX6827ZUT+ supports secondary supply monitoring via the VCC2 pin with a factory-trimmed threshold of 2.244V (min) to 2.388V (max) over –40°C to +125°C, nominal 2.313V. This is distinct from the adjustable RESET IN feature found in MAX6826/MAX6827/MAX6828 - VCC2 is fixed and optimized for 2.5V or 2.3V rails.
What type of RESET output does MAX6827ZUT+ provide, and how does it interface with a microprocessor?
MAX6827ZUT+ provides a push-pull active-high RESET output. When asserted, RESET goes high (VOH ≥ 0.8 × VCC); when deasserted, it goes low (VOL ≤ 0.3V). This allows direct connection to µPs requiring active-high reset signaling - no external pullup resistor is needed, unlike open-drain alternatives such as MAX6828ZUT+ or MAX6831ZUT+.
Can the watchdog timer in MAX6827ZUT+ be disabled, and how?
Yes, the watchdog timer in MAX6827ZUT+ is disabled by leaving the WDI pin unconnected or connecting it to a three-stated buffer output. When WDI is floating, the internal driver cycles low-high-low every ~1.4s, preventing timeout. No configuration register or external command is required - disabling is purely hardware-based and requires no firmware changes.
Is MAX6827ZUT+ qualified for operation at –40°C to +125°C, and what parameters are guaranteed across that range?
Yes, MAX6827ZUT+ is fully specified and guaranteed over –40°C to +125°C. Key parameters guaranteed across this range include VCC and VCC2 reset thresholds, 140ms minimum reset timeout period, 1.12s to 2.4s watchdog timeout, RESET output VOL ≤ 0.3V, and VCC supply current ≤ 30µA at +3.6V - all explicitly listed in the Electrical Characteristics table with temperature columns.
MAX6827ZUT+ 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 High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6827ZUT+ FAQ
1.How can I place an order for MAX6827ZUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6827ZUT+ 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 MAX6827ZUT+ reliable?
The price and inventory of MAX6827ZUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6827ZUT+ is usually 5 days.
3.What payment methods are accepted for MAX6827ZUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6827ZUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6827ZUT+?
MAX6827ZUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6827ZUT+ 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 MAX6827ZUT+?
For technical support, including MAX6827ZUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6827ZUT+ requirements.
6.How does Aetrix verify that MAX6827ZUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6827ZUT+ 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 MAX6827ZUT+ meets industry standards.
7.What is the process for return or replacement of MAX6827ZUT+?
All MAX6827ZUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6827ZUT+, 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 MAX6827ZUT+ part is unused and in its original packaging.
Return procedure for MAX6827ZUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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