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Analog Devices Inc./Maxim Integrated MAX6727KAWGD3+T
- Part No.:
- MAX6727KAWGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727KAWGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6727KAWGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and RSTIN (626.5mV reference) with 210ms reset timeout, watchdog timer, manual reset input, and dual open-drain reset outputs - used in multivoltage telecom and industrial power management systems.
For engineers reviewing the MAX6727KAWGD3+T datasheet, MAX6727KAWGD3+T pinout, MAX6727KAWGD3+T application, or MAX6727KAWGD3+T equivalent, this page delivers verified specifications, exact pin functions, real-world use cases for dual-RST supervision, and validated alternative parts for voltage-monitoring redundancy and system-level reset coordination.
Technical Context
The MAX6727KAWGD3+T integrates three independent voltage monitors: primary supply (VCC1) with factory-trimmed 4.625V reset threshold, secondary supply (VCC2) at 3.075V, and adjustable auxiliary input (RSTIN) referenced to a 626.5mV internal bandgap. It asserts two synchronized active-low open-drain reset outputs (RST and RST2) upon any monitored voltage drop below its threshold.
It features a dual-mode watchdog timer (35s startup / 1.12s normal mode), manual reset input (MR) with 50kΩ internal pullup, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. The device operates across –40°C to +85°C and draws only 14µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - sets precise brownout detection for 5V or 4.8V primary rails |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - enables reliable monitoring of 3.3V I/O or core supplies |
| RSTIN Reference Voltage | 626.5mV (±15.5mV) - allows external resistor-divider to monitor third supply as low as 0.62V |
| Reset Timeout Period | 210ms (min) - ensures µP completes boot sequence before releasing reset |
| Watchdog Timeout | 1.12s (min) normal mode; 35s (min) startup mode - accommodates long initialization then tight fault response |
| Supply Current | 14µA (typ) at 3.6V - supports ultra-low-power battery-backed or always-on supervision |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom equipment environments |
Pinout & Package
MAX6727KAWGD3+T is housed in an 8-pin SOT23-8 package (2.0mm × 2.1mm × 1.25mm), surface-mount, lead-free, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserted when VCC1/VCC2/RSTIN/MR/WDI fault occurs; requires external pullup |
| 2 | GND | Ground reference for all internal comparators, timers, and logic |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); initiates full reset on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal VCC2 monitor and RST2 output stage |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers main logic, VCC1 monitor, RST output, and WDI interface |
| 6 | RSTIN | Adjustable undervoltage monitor input; high-impedance (±25nA); referenced to 626.5mV internal reference |
| 7 | WDI | Watchdog input; detects µP activity via rising/falling edges; triggers reset if idle >1.12s (normal) or >35s (startup) |
| 8 | RST2 | Second active-low open-drain reset output; identical timing/function to RST but driven from VCC2 domain |
Key Features
| Feature | Design Value |
|---|---|
| Dual open-drain RST outputs | Independent RST and RST2 pins enable simultaneous reset of multiple voltage domains (e.g., CPU + FPGA) without contention |
| Triple-voltage monitoring | Factory-set VCC1 (4.625V) and VCC2 (3.075V) plus RSTIN (626.5mV ref) support full-system power integrity verification |
| Guaranteed reset validity to 0.8V | Ensures clean, monotonic reset assertion even during deep brownout - critical for nonvolatile memory write protection |
| Immunity to short VCC transients | Rejects <20µs negative glitches (per 100mV overdrive), preventing spurious resets in noisy power environments |
| Low 14µA supply current | Minimizes standby power draw in battery-powered or energy-harvesting applications where supervision must persist |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Supervising 48V-to-5V/3.3V/1.2V DC/DC conversion chain in base station power subsystem. IC Role / Device Role / Timing Role: Triple-voltage monitor asserting coordinated RST and RST2 to hold CPU, FPGA, and analog front-end in reset until all rails stabilize. Use Value: Prevents partial initialization and latch-up by enforcing strict sequencing with 210ms timeout and 626.5mV RSTIN monitoring of auxiliary bias rail. |
Use Scenario: Monitoring redundant 24V input, isolated 5V logic, and 3.3V microcontroller supply in programmable logic controller backplane. IC Role / Device Role / Timing Role: Dual-RST output drives separate reset lines for safety-critical I/O ASIC and main ARM Cortex-M7 MCU. Use Value: Enables independent reset release timing and fault isolation - RST2 tied to I/O domain ensures analog signal integrity before digital handshake. |
| Server Management Controller | Battery-Powered Edge Sensor Node |
Use Scenario: Embedded BMC (Baseboard Management Controller) requiring fail-safe reset coordination across 12V, 5V, and 3.3V rails. IC Role / Device Role / Timing Role: MAX6727KAWGD3+T provides watchdog supervision (WDI) and MR-triggered reset for firmware recovery and hot-swap event handling. Use Value: 35s startup watchdog window allows full BMC boot before enabling 1.12s runtime monitoring - eliminates false positives during POST. |
Use Scenario: Long-life environmental sensor node powered by Li-SOCl₂ battery with 3.6V main rail, 2.8V ADC reference, and 1.8V MCU core. IC Role / Device Role / Timing Role: RSTIN monitors 2.8V reference rail via resistor divider; VCC1/VCC2 track main and core supplies; dual RST outputs manage sensor and radio subsystems. Use Value: 14µA quiescent current extends battery life beyond 10 years; 0.8V reset validity ensures safe shutdown before battery depletion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6728KAUD3+T | Includes PFO (power-fail output) instead of second RST; single open-drain RST output | Used where early power-fail interrupt (PFO) is required instead of dual reset signaling | Select when system needs power-fail warning to initiate graceful shutdown, not dual-domain reset control |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); fixed 3.3V VDD threshold; 200ms timeout; push-pull RST | Lacks third-voltage monitoring and dual-RST capability; suited for simpler 3.3V-centric designs | Choose for cost-sensitive, single-rail applications where auxiliary voltage monitoring is unnecessary |
Compared with MAX6727KAWGD3+T, MAX6728KAUD3+T trades dual-RST for PFO functionality - ideal for power-aware firmware shutdown - while TPS3808G33DBVR offers lower cost and smaller footprint but omits RSTIN and second reset output, limiting use to dual-rail-only systems.
Availability
MAX6727KAWGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, server management controllers, and battery-operated edge sensors requiring stable component supply, long-lifecycle assurance, and guaranteed dual-reset coordination.
Supply support for MAX6727KAWGD3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained systems needing robust power integrity monitoring, watchdog supervision, and flexible reset architecture.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6727KAWGD3+T?
The MAX6727KAWGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) with ±0.5% hysteresis. This value is encoded in the "KW" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified across –40°C to +85°C.
Does MAX6727KAWGD3+T support both push-pull and open-drain reset outputs?
No - MAX6727KAWGD3+T provides two open-drain active-low reset outputs (RST and RST2), as confirmed in the Selector Guide and Pin Description. It does not include push-pull reset drivers; those are found in variants like MAX6726 or MAX6729.
How is the 210ms reset timeout period set on MAX6727KAWGD3+T?
The "D3" suffix in MAX6727KAWGD3+T specifies a minimum 140ms, typical 210ms, and maximum 280ms reset timeout period. This is implemented via internal capacitor-based timing and is temperature-stable across –40°C to +85°C per the Electrical Characteristics table.
Can MAX6727KAWGD3+T monitor a 1.2V supply using the RSTIN pin?
Yes - the RSTIN pin uses a 626.5mV internal reference. To monitor a 1.2V rail, connect a resistor divider (e.g., R1 = 910kΩ, R2 = 1MΩ) so that RSTIN sees 626.5mV when the 1.2V rail drops to its trip point, enabling precise undervoltage detection down to 0.62V input.
What is the function of the WDI pin on MAX6727KAWGD3+T?
The WDI (watchdog input) pin on MAX6727KAWGD3+T monitors µP activity: a transition (rising or falling edge) within 1.12s (normal mode) or 35s (startup mode) clears the watchdog timer. Failure to toggle WDI triggers RST/RST2 assertion for the full 210ms timeout period.
MAX6727KAWGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 1.665V, 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
MAX6727KAWGD3+T FAQ
1.How can I place an order for MAX6727KAWGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KAWGD3+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 MAX6727KAWGD3+T reliable?
The price and inventory of MAX6727KAWGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KAWGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6727KAWGD3+T?
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4.How is shipping managed for MAX6727KAWGD3+T?
MAX6727KAWGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KAWGD3+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 MAX6727KAWGD3+T?
For technical support, including MAX6727KAWGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KAWGD3+T requirements.
6.How does Aetrix verify that MAX6727KAWGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6727KAWGD3+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 MAX6727KAWGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6727KAWGD3+T?
All MAX6727KAWGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KAWGD3+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 MAX6727KAWGD3+T part is unused and in its original packaging.
Return procedure for MAX6727KAWGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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