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Analog Devices Inc./Maxim Integrated MAX6727KASHD3
- Part No.:
- MAX6727KASHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727KASHD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,409
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Product details
Overview
The MAX6727KASHD3 from Maxim Integrated is a dual-voltage, ultra-low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms reset timeout, 14µA supply current at 3.6V, and guaranteed reset validity down to VCC = 0.8V - used for reliable power-on reset and brownout detection in battery-powered embedded controllers.
For engineers reviewing the MAX6727KASHD3 datasheet, MAX6727KASHD3 pinout, MAX6727KASHD3 application, or MAX6727KASHD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over -40°C to +125°C), RSTIN-adjustable third-voltage monitoring capability (626mV reference), watchdog disable-by-open WDI, and push-pull active-low RST output referenced to VCC1.
Technical Context
The MAX6727KASHD3 implements dual independent voltage comparators with factory-trimmed thresholds (VTH1 = 4.625V, VTH2 = 3.075V), hysteresis of 0.5%, and temperature coefficient of 20ppm/°C. It integrates a 210ms minimum reset timeout timer triggered on any supply drop, MR assertion, or RSTIN undervoltage.
This device supports triple-voltage supervision via high-impedance RSTIN input (626.5mV internal reference, ±15mV tolerance), enabling external resistor-divider monitoring of auxiliary supplies as low as 0.62V. Its push-pull RST output drives directly to VCC1 with VOL ≤ 0.4V at 3.2mA sink, eliminating need for external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over full temp range) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over full temp range) |
| Reset Timeout | 210ms min (ensures µP completes boot before release) |
| Supply Current | 14µA typ at 3.6V (enables >10-year battery life in always-on systems) |
| RSTIN Reference | 626.5mV (supports external divider for third-supply monitoring down to 0.62V) |
| Operating Temp | -40°C to +125°C (qualified for automotive under-hood and industrial control environments) |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V (prevents spurious release during deep brownout) |
Pinout & Package
MAX6727KASHD3 is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), compatible with standard reflow profiles and automated assembly. Pin 1 is marked with dot; pin numbering follows standard SOT23-8 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2/RSTIN drops below threshold or MR pulled low |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; resets system on button press |
| 4 | VCC2 | Secondary supply input (powers internal circuitry when VCC2 > VCC1); monitored at 3.075V threshold |
| 5 | VCC1 | Primary supply input (powers device when VCC1 > VCC2); monitored at 4.625V threshold |
| 6 | RSTIN | High-impedance adjustable reset input (626.5mV reference); enables third-supply monitoring via external resistor divider |
| 7 | PFO | Active-low power-fail output (open-drain); asserts when PFI < 626.5mV; deasserts immediately without timeout |
| 8 | PFI | Power-fail monitor input (626.5mV reference); used to detect early supply collapse or battery depletion |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | Enables precise, drift-free monitoring of primary (4.625V) and secondary (3.075V) rails without external resistors |
| 210ms reset timeout | Provides sufficient hold time for complex µP initialization sequences while minimizing boot delay |
| RSTIN-adjustable third-voltage monitor | Supports monitoring of auxiliary supplies (e.g., 1.2V core, 0.9V I/O) using only two external resistors |
| Watchdog disable by open WDI | Eliminates need for external pullup/down; simplifies design when watchdog function is unused |
| Push-pull RST output | Drives reset line directly without external pullup, reducing BOM count and PCB area in space-constrained designs |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC Power Management |
|---|---|
Use Scenario: Long-life remote sensor node powered by coin cell, requiring reliable power-on reset and brownout protection during intermittent RF transmission. IC Role / Device Role / Timing Role: Dual-supply supervisor monitors main 3.3V rail and backup 1.8V RTC supply; asserts RST until both stabilize above thresholds and hold for 210ms. Use Value: Prevents firmware corruption during weak-battery brownout; 14µA quiescent current extends battery life beyond 10 years. | Use Scenario: Programmable logic controller with separate 24V field I/O supply and 5V logic supply, needing coordinated reset on either rail failure. IC Role / Device Role / Timing Role: Monitors 24V (via resistor divider to RSTIN) and 5V (VCC1) rails; triggers reset if either falls below threshold, holding for 210ms to ensure clean state recovery. Use Value: Eliminates need for discrete comparators and RC timers; factory-trimmed thresholds ensure consistent trip points across production units. |
| Automotive Body Control Module | Medical Portable Diagnostic Device |
Use Scenario: Under-hood BCM exposed to -40°C to +125°C ambient, requiring guaranteed reset assertion during cold cranking (battery dip to 6V). IC Role / Device Role / Timing Role: Supervises 12V (divided to RSTIN) and 5V logic rails; maintains valid RST output even when VCC1 drops to 0.8V during cranking transients. Use Value: Meets AEC-Q100 Grade 0 requirements; 20ppm/°C tempco ensures <1% threshold drift across full temperature range. | Use Scenario: Handheld ultrasound device with Li-ion battery, 3.3V main rail, and 1.2V FPGA core, requiring fail-safe reset on any supply anomaly. IC Role / Device Role / Timing Role: Uses VCC1 (3.3V), VCC2 (1.2V), and RSTIN (monitors battery voltage) to provide triple-supply supervision with single IC. Use Value: Reduces component count vs. three discrete supervisors; 8-pin SOT23 fits tight layout constraints near µP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726KASHD3 | Same pinout, identical thresholds and timeout, but open-drain RST output (requires external pullup) | Suitable where level-shifting or wired-OR reset bus is needed | Select when interfacing with bidirectional µP reset pins or multi-source reset buses |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN, 200ms timeout, 1.6µA IQ | Limited to single-rail monitoring; lacks triple-supply flexibility | Choose for ultra-low-power single-rail systems where RSTIN and dual-threshold features are unnecessary |
Compared with MAX6726KASHD3, the MAX6727KASHD3 offers direct-drive push-pull RST, reducing external components; versus TPS3808G33DBVR, it provides dual-threshold supervision and RSTIN expandability at higher quiescent current - critical for multi-rail reliability-critical systems.
Availability
MAX6727KASHD3 is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLCs, automotive body control modules, and portable medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6727KASHD3 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 leadership in supervisory, PMIC, and data-converter technologies.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, multi-rail supervision for space-constrained, high-reliability systems - engineered to replace discrete reset circuits in automotive, industrial, and portable equipment.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6727KASHD3?
The MAX6727KASHD3 has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over -40°C to +125°C. These values are encoded in the part number suffix "KAS" per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table of the official datasheet.
Does the MAX6727KASHD3 support monitoring a third supply voltage?
Yes, the MAX6727KASHD3 supports third-supply monitoring via its RSTIN pin, which features a precise 626.5mV internal reference. By connecting an external resistor divider from the auxiliary supply to GND with RSTIN at the midpoint, users can set custom thresholds down to 0.62V - confirmed in the Adjustable Reset Comparator Input section of the datasheet.
What is the reset timeout period for the MAX6727KASHD3 and how is it set?
The MAX6727KASHD3 has a 210ms minimum reset timeout period, indicated by the "D3" suffix in the part number per Maxim's Reset Timeout Period Suffix Guide. This fixed timeout is internally programmed and guarantees the RST output remains asserted for ≥210ms after all monitored supplies exceed their thresholds, ensuring robust µP initialization.
Is the RST output of the MAX6727KASHD3 push-pull or open-drain?
The MAX6727KASHD3 features a push-pull RST output referenced to VCC1, capable of sourcing up to 800µA and sinking up to 3.2mA while maintaining VOL ≤ 0.4V. This eliminates the need for an external pullup resistor - a key distinction from open-drain variants like MAX6726KASHD3, as documented in the Pin Description and RESET OUTPUTS sections.
Can the watchdog timer on the MAX6727KASHD3 be disabled?
Yes, the watchdog timer on the MAX6727KASHD3 is disabled by leaving the WDI pin unconnected. The device incorporates a 200nA internal current source to detect the open state, and the datasheet explicitly states "Leave WDI unconnected to disable the watchdog timer" - confirmed in the Watchdog Input section and Figure 2 timing diagram.
MAX6727KASHD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6727KASHD3 FAQ
1.How can I place an order for MAX6727KASHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KASHD3 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 MAX6727KASHD3 reliable?
The price and inventory of MAX6727KASHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KASHD3 is usually 5 days.
3.What payment methods are accepted for MAX6727KASHD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727KASHD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727KASHD3?
MAX6727KASHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KASHD3 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 MAX6727KASHD3?
For technical support, including MAX6727KASHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KASHD3 requirements.
6.How does Aetrix verify that MAX6727KASHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6727KASHD3 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 MAX6727KASHD3 meets industry standards.
7.What is the process for return or replacement of MAX6727KASHD3?
All MAX6727KASHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KASHD3, 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 MAX6727KASHD3 part is unused and in its original packaging.
Return procedure for MAX6727KASHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6727KASHD3 Tags
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MIC826SYMT-TR
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