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Analog Devices Inc./Maxim Integrated MAX6727KARVD3+T
- Part No.:
- MAX6727KARVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6727KARVD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-8
- Quantity:
- Payment:
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Inventory:3,405
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Product details
Overview
MAX6727KARVD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (1.575V threshold), VCC2 (3.075V threshold), and RSTIN (626.5mV reference) with 210ms minimum reset timeout, push-pull RST and open-drain RST2 outputs, and integrated watchdog timer - used in multivoltage telecom power systems to ensure reliable boot and brownout recovery.
For engineers reviewing the MAX6727KARVD3+T datasheet, MAX6727KARVD3+T pinout, MAX6727KARVD3+T application, or MAX6727KARVD3+T equivalent, this page delivers verified electrical specs, dual reset output behavior, RSTIN-adjustable third-voltage monitoring capability, watchdog startup timing (35s initial / 1.12s normal), and validated alternatives for dual-supply fail-safe supervision.
Technical Context
The MAX6727KARVD3+T implements independent voltage comparators for VCC1, VCC2, and RSTIN, each feeding into a shared reset timeout timer that restarts on any threshold violation. Its dual reset outputs (RST push-pull referenced to VCC1; RST2 open-drain referenced to VCC2) enable simultaneous control of primary and secondary domain resets without external logic.
It integrates a dual-mode watchdog with 35s minimum startup period (for complex boot sequences) and 1.12s minimum normal timeout (for runtime fault detection), triggered by WDI edge transitions. Reset assertion is guaranteed down to VCC1 or VCC2 = 0.8V, and RSTIN supports externally adjustable thresholds via resistor divider using its 626.5mV internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.575V (factory-trimmed, ±2.5% over -40°C to +85°C) - sets primary supply brownout detection point for 1.8V I/O rails |
| VCC2 Threshold | 3.075V (factory-trimmed, ±2.5%) - monitors secondary 3.3V core supply with hysteresis of 0.5% |
| RSTIN Reference | 626.5mV (±2.5mV) - enables precise third-voltage monitoring down to 0.62V via external resistor divider |
| Reset Timeout | 210ms (min) - ensures µP reset hold time meets typical bootloader initialization requirements |
| Supply Current | 14µA (typ at 3.6V) - enables use in battery-backed systems with multi-year standby life |
| Watchdog Periods | 35s min startup / 1.12s min normal - prevents false resets during boot while enabling rapid fault response in steady state |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
Pinout & Package
MAX6727KARVD3+T is housed in an 8-pin SOT23-8 package (2.0mm × 2.1mm × 1.25mm height), RoHS-compliant and lead-free (+T suffix), with exposed pad for thermal enhancement and standard JEDEC moisture sensitivity level 1 handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when any monitored supply drops below threshold or WDI times out |
| 2 | GND | System ground reference for all comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; forces reset when pulled low |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal circuitry when > VCC1 and sets VCC2 comparator reference |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers device when > VCC2 and sets VCC1 comparator reference |
| 6 | RSTIN | High-impedance adjustable reset input; compares against 626.5mV reference to monitor third supply (e.g., 1.2V core) |
| 7 | WDI | Watchdog input; rising/falling edges reset dual-mode timer; long startup (35s) followed by short normal period (1.12s) |
| 8 | RST2 | Active-low open-drain reset output referenced to VCC2; provides independent reset signal for secondary domain |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | RST (push-pull, VCC1-referenced) and RST2 (open-drain, VCC2-referenced) allow concurrent reset control of I/O and core domains |
| Triple-voltage monitoring | Simultaneous factory-trimmed VCC1/VCC2 thresholds plus RSTIN with 626.5mV reference enables full-system supply supervision |
| Dual-mode watchdog timer | 35s startup window accommodates bootloader execution; 1.12s runtime timeout detects software hangs without false triggers |
| Guaranteed reset validity | Outputs remain functional down to VCC1 or VCC2 = 0.8V - critical for graceful shutdown during deep brownout conditions |
| Low-power operation | 14µA typical supply current at 3.6V enables integration into always-on subsystems without compromising battery life |
Applications
| Telecom Power Management | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Dual-rail DC/DC converter system powering FPGA I/O (1.8V) and core (1.2V) with backup battery. IC Role / Device Role / Timing Role: Supervises VCC1 (1.8V), VCC2 (1.2V), and RSTIN (battery voltage) to assert RST on brownout and RST2 on core rail collapse. Use Value: Prevents FPGA configuration corruption by holding reset until both rails stabilize post-brownout, with 210ms timeout ensuring complete power sequencing. |
Use Scenario: Modular PLC backplane with hot-swappable I/O modules requiring coordinated reset across 5V logic and 3.3V communication interfaces. IC Role / Device Role / Timing Role: Monitors main 5V supply (VCC1), isolated 3.3V comms rail (VCC2), and auxiliary 24V field power (via RSTIN divider) to trigger domain-specific resets. Use Value: Enables safe module insertion/removal by asserting RST2 only on comms rail failure while maintaining logic domain operation via RST. |
| Network Router Line Cards | Medical Diagnostic Equipment |
|
Use Scenario: High-density line card with multiple ASICs powered by 1.0V, 1.8V, and 3.3V rails, subject to transient load switching noise. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 1.0V core rail, VCC1 for 1.8V I/O, VCC2 for 3.3V PHY - all feeding single reset timeout timer. Use Value: Immunity to sub-20µs VCC transients avoids spurious resets during high-speed packet bursts, while 210ms timeout ensures ASIC firmware reload completes. |
Use Scenario: Portable ultrasound unit with lithium battery, buck-boost regulator, and safety-critical FPGA-based beamformer. IC Role / Device Role / Timing Role: Supervises battery voltage (RSTIN), regulated 3.3V analog front-end (VCC1), and 1.2V digital core (VCC2) with watchdog monitoring FPGA activity. Use Value: Dual-mode watchdog (35s startup / 1.12s runtime) guarantees beamformer initialization completes before runtime supervision begins, meeting IEC 62304 Class C requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6725KA3D3+T | Same 8-pin SOT23 package, identical VCC1/VCC2/RSTIN thresholds and 210ms timeout, but adds active-high RST output alongside RST2 | Required where µP reset pin is bidirectional and needs complementary polarity signals | Select MAX6725KA3D3+T if system requires both active-low and active-high reset assertions on separate pins |
| TPS3808G33DBVR | Single-supply (VDD only), no RSTIN or VCC2 monitoring; 3.3V fixed threshold, 200ms timeout, lower quiescent current (1.1µA) | Suitable only for single-rail systems; lacks triple-monitoring capability and dual reset outputs | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage applications where RSTIN/VCC2 supervision is unnecessary |
Compared with MAX6727KARVD3+T, MAX6725KA3D3+T offers enhanced reset polarity flexibility at identical monitoring capability, while TPS3808G33DBVR reduces cost and current but sacrifices triple-supply coverage and dual-domain reset control - making MAX6727KARVD3+T optimal for multirail reliability-critical designs.
Availability
MAX6727KARVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6727KARVD3+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 and mixed-signal ICs for power management, sensing, and interface applications, with leadership in supervisory, PMIC, and data-converter solutions.
The MAX6715–MAX6729 family was engineered specifically for multivoltage embedded systems needing compact, ultra-low-power, triple-supply supervision with flexible reset architecture and robust watchdog timing - targeting telecom, industrial, and portable equipment.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6727KARVD3+T?
The MAX6727KARVD3+T has a factory-trimmed VCC1 reset threshold of 1.575V (minimum 1.530V, maximum 1.620V) with ±2.5% tolerance over temperature. This value is encoded in the "K" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is confirmed in the Electrical Characteristics table on page 2 of the datasheet.
Does the MAX6727KARVD3+T support monitoring a third voltage, and how is it configured?
Yes, the MAX6727KARVD3+T supports third-voltage monitoring via the RSTIN pin, which compares the applied voltage against an internal 626.5mV reference. To monitor a higher voltage (e.g., 5V), connect a resistor divider between the supply and GND, with the midpoint fed to RSTIN - the threshold is calculated as VEXT_TH = 626.5mV × (R1 + R2)/R2.
What are the reset output types and drive capabilities of the MAX6727KARVD3+T?
The MAX6727KARVD3+T provides two reset outputs: RST is a push-pull active-low output referenced to VCC1 (VOH ≥ 0.8×VCC1, VOL ≤ 0.4V at 3.2mA sink), and RST2 is an open-drain active-low output referenced to VCC2 (requires external pullup, leakage < 0.5µA when deasserted).
How does the watchdog timer operate on the MAX6727KARVD3+T?
The MAX6727KARVD3+T features a dual-mode watchdog: after any reset event (power-up, MR, or timeout), it enters a 35s minimum startup period; the first valid WDI edge before timeout completion switches it to 1.12s minimum normal mode. WDI must see rising/falling edges within this window to prevent reset assertion.
Is the MAX6727KARVD3+T compatible with 0.8V supply operation, and what happens to reset outputs at low VCC?
Yes, the MAX6727KARVD3+T guarantees correct reset output logic state down to VCC1 or VCC2 = 0.8V. Below this, RST remains asserted (low) for push-pull operation, while RST2 requires external pullup to maintain defined logic level - ensuring fail-safe behavior during deep brownout conditions.
MAX6727KARVD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6727KARVD3+T FAQ
1.How can I place an order for MAX6727KARVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KARVD3+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 MAX6727KARVD3+T reliable?
The price and inventory of MAX6727KARVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KARVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6727KARVD3+T?
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4.How is shipping managed for MAX6727KARVD3+T?
MAX6727KARVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KARVD3+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 MAX6727KARVD3+T?
For technical support, including MAX6727KARVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KARVD3+T requirements.
6.How does Aetrix verify that MAX6727KARVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6727KARVD3+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 MAX6727KARVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6727KARVD3+T?
All MAX6727KARVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KARVD3+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 MAX6727KARVD3+T part is unused and in its original packaging.
Return procedure for MAX6727KARVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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