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Analog Devices Inc./Maxim Integrated MAX6727KARVD3
- Part No.:
- MAX6727KARVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727KARVD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6727KARVD3 from Maxim Integrated is a dual-voltage, ultra-low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package. It monitors VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 2.925V and 1.665V respectively, asserts active-low open-drain RST and RST2 outputs, and provides a 210ms minimum reset timeout period. It is designed for reliable power monitoring in battery-powered embedded systems where supply integrity must be maintained down to 0.8V.
For engineers reviewing the MAX6727KARVD3 datasheet, MAX6727KARVD3 pinout, MAX6727KARVD3 application, or MAX6727KARVD3 equivalent, key selection criteria include its dual-supply monitoring capability, guaranteed reset validity at VCC ≥ 0.8V, low 14µA typical supply current, open-drain output configuration, and compatibility with 1.2V–5.0V system rails.
Technical Context
The MAX6727KARVD3 implements dual independent voltage comparators with hysteresis (0.5% of threshold), each feeding into a shared reset timeout timer. Its RST and RST2 outputs are both active-low open-drain, referenced to VCC1 and VCC2 respectively, and asserted simultaneously when either supply falls below its threshold or when MR is pulled low.
It features no watchdog or power-fail functionality - confirmed by absence of WDI, PFI, and PFO pins in its pinout and omission from its ordering suffix group. The "D3" timeout suffix corresponds to a 210ms (min) reset hold time after all monitored supplies recover.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V (typ), factory-trimmed for stable 3.0V rail monitoring with ±37.5mV tolerance |
| VCC2 Threshold | 1.665V (typ), factory-trimmed for stable 1.8V rail monitoring with ±45mV tolerance |
| Reset Timeout | 210ms (min), ensures µP reset remains asserted long enough for full system stabilization |
| Supply Current | 14µA (typ at 3.6V), enables multi-year operation in always-on battery-powered devices |
| Operating Temp | -40°C to +125°C, supports industrial and automotive under-hood applications |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V, guarantees correct logic state during brownout recovery |
| Output Type | Open-drain RST and RST2, allows wired-OR configuration and level translation across voltage domains |
Pinout & Package
MAX6727KARVD3 is housed in an 8-pin SOT23 package (SOT23-8), measuring 4.9mm × 6.0mm × 1.75mm, with gull-wing leads and RoHS-compliant finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output referenced to VCC1; requires external pullup |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; debounced by design |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers VCC2 comparator and RST2 output stage |
| 5 | RST2 | Active-low open-drain reset output referenced to VCC2; independent assertion timing from RST |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, VCC1 comparator, and RST output stage |
| 7 | RSTIN | Adjustable reset input with 626.5mV internal reference; unused in this variant per pin mapping |
| 8 | PFO | Power-fail output pin; not functional in MAX6727A series - left unconnected or tied to GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 and VCC2 supervision with separate thresholds and outputs avoids single-point failure |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during deep brownout, critical for flash write integrity |
| Open-drain RST and RST2 outputs | Enables flexible reset bus architecture with multiple supervisors or mixed-voltage µPs on same line |
| Factory-trimmed precision thresholds | Eliminates external resistor networks and calibration, reducing BOM count and layout area |
| Low 14µA supply current | Extends battery life in portable medical, IoT sensor, and wearables without sacrificing supervision reliability |
Applications
| Battery-Powered IoT Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless sensor node powered by a 3.0V Li-SOCl₂ primary cell and regulated 1.8V core supply must maintain data integrity during voltage sag. IC Role / Device Role / Timing Role: MAX6727KARVD3 continuously monitors both rails and asserts RST/RST2 to halt µP execution before undervoltage causes SRAM corruption. Use Value: Prevents firmware crash and flash write errors during battery depletion, enabling safe shutdown and retained configuration. | Use Scenario: An isolated digital I/O module in a factory automation controller uses 24V DC input converted to 3.3V and 1.2V rails. IC Role / Device Role / Timing Role: MAX6727KARVD3 supervises the 3.3V logic rail (VCC1) and 1.2V FPGA core rail (VCC2), asserting reset if either drops below spec. Use Value: Eliminates need for discrete supervisor ICs per rail, reducing footprint and improving mean time between failures (MTBF). |
| Medical Wearable Monitor | Automotive Body Control Module |
Use Scenario: A wearable ECG patch operates from a 3.6V coin cell and generates 1.8V analog front-end supply. IC Role / Device Role / Timing Role: MAX6727KARVD3 monitors both supplies and holds reset until both stabilize post-power-up, preventing analog initialization faults. Use Value: Ensures clean startup of ADC and RF transceiver, avoiding false alarms or missed heartbeats due to marginal supply conditions. | Use Scenario: A BCM supplies 5.0V MCU rail and 3.3V CAN transceiver rail from vehicle battery (9V–16V). IC Role / Device Role / Timing Role: MAX6727KARVD3 supervises the 5.0V (VCC1) and 3.3V (VCC2) rails, asserting reset during cold-crank voltage dip below 6V. Use Value: Maintains reset assertion through 0.8V brownout, ensuring MCU does not execute spurious code during engine start transient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726KARVD3 | Push-pull RST and RST2 outputs instead of open-drain; identical thresholds and timeout | Requires no external pullups; incompatible with wired-OR reset buses | Select when driving single-load reset lines and minimizing external components |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input or RST2 output; 200ms timeout | Lacks secondary rail supervision; cannot replace dual-monitoring requirement | Use only if system has only one critical supply or adds second supervisor separately |
Compared with MAX6726KARVD3, the MAX6727KARVD3 offers open-drain flexibility for multi-device reset arbitration; compared with TPS3808G33DBVR, it uniquely provides true dual-rail supervision in one IC, eliminating board space and BOM overhead of cascaded supervisors.
Availability
MAX6727KARVD3 is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLC I/O modules, medical wearable monitors, and automotive body control modules requiring stable component supply across extended temperature ranges.
Supply support for MAX6727KARVD3 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply supervisory circuits in miniature SOT23 packages, targeting space-constrained, low-power embedded systems needing robust power integrity assurance.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6727KARVD3?
The MAX6727KARVD3 has a factory-trimmed VCC1 reset threshold of 2.925V (typical), with a guaranteed range of 2.850V to 3.000V at -40°C to +125°C. This value is fixed by the "R" suffix in the part number and applies to the primary supply monitoring function of the MAX6727KARVD3.
Does the MAX6727KARVD3 include a watchdog timer function?
No, the MAX6727KARVD3 does not include a watchdog timer. Its pinout lacks WDI, and the device belongs to the MAX6727A subgroup, which is explicitly defined in the datasheet as omitting watchdog, power-fail, and adjustable RSTIN functionality. The MAX6727KARVD3 relies solely on voltage monitoring and manual reset for system supervision.
What is the purpose of the RST2 pin on the MAX6727KARVD3?
The RST2 pin on the MAX6727KARVD3 is an active-low open-drain reset output referenced to VCC2. It asserts simultaneously with RST when either VCC1 or VCC2 falls below its respective threshold, providing independent reset signaling for subsystems powered by the secondary rail - a key feature distinguishing the MAX6727KARVD3 from single-output supervisors.
Can the MAX6727KARVD3 operate with a 1.2V VCC2 supply?
Yes, the MAX6727KARVD3 supports VCC2 inputs from 0.9V to 3.3V, making 1.2V fully compatible. Its VCC2 reset threshold is 1.665V (typ), so a 1.2V rail would be monitored as a *secondary* supply only if configured via external divider - but per datasheet, the MAX6727KARVD3's VCC2 input is intended for supplies ≥1.2V used as actual system rails, not sub-threshold monitoring.
Is the MAX6727KARVD3 pin-compatible with other MAX67xxA variants in SOT23-8?
No, the MAX6727KARVD3 is not universally pin-compatible across the SOT23-8 variants. While it shares the 8-pin SOT23 package, pin functions differ: for example, MAX6728A/MAX6729A assign Pin 8 to PFO, whereas MAX6727A assigns Pin 8 to PFO (nonfunctional) and uses Pins 1/5 for dual open-drain RST outputs - requiring schematic and layout verification before substitution.
MAX6727KARVD3 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:
- 1.575V, 2.625V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6727KARVD3 FAQ
1.How can I place an order for MAX6727KARVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KARVD3 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 MAX6727KARVD3 reliable?
The price and inventory of MAX6727KARVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KARVD3 is usually 5 days.
3.What payment methods are accepted for MAX6727KARVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727KARVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727KARVD3?
MAX6727KARVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KARVD3 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 MAX6727KARVD3?
For technical support, including MAX6727KARVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KARVD3 requirements.
6.How does Aetrix verify that MAX6727KARVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6727KARVD3 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 MAX6727KARVD3 meets industry standards.
7.What is the process for return or replacement of MAX6727KARVD3?
All MAX6727KARVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KARVD3, 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 MAX6727KARVD3 part is unused and in its original packaging.
Return procedure for MAX6727KARVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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