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Analog Devices Inc./Maxim Integrated MAX6727KATGD3
- Part No.:
- MAX6727KATGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727KATGD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:532
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Product details
Overview
The MAX6727KATGD3 from Maxim Integrated is a dual-voltage, ultra-low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (1.62V threshold) and VCC2 (0.788V threshold) with 210ms reset timeout, watchdog disable capability, and open-drain RST/RST2 outputs - used to ensure reliable power-on reset and brownout recovery in battery-powered embedded systems.
For engineers reviewing the MAX6727KATGD3 datasheet, MAX6727KATGD3 pinout, MAX6727KATGD3 application, or MAX6727KATGD3 equivalent, key selection criteria include guaranteed reset validity down to VCC = 0.8V, 14µA typical supply current at 3.6V, externally adjustable RSTIN input for third-voltage monitoring (626.5mV reference), and immunity to sub-100ns VCC transients.
Technical Context
The MAX6727KATGD3 implements dual independent voltage monitoring with factory-trimmed thresholds: VTH1 = 1.62V (±45mV) on VCC1 and VTH2 = 0.788V (±25mV) on VCC2, both referenced to internal bandgap references with 20ppm/°C tempco. It asserts active-low reset when either supply falls below its threshold and holds reset for a guaranteed minimum 210ms after both supplies recover.
This device includes an adjustable RSTIN input (626.5mV ±15.5mV reference, 100nA max input current) for monitoring a third supply down to 0.62V, plus manual-reset (MR) with 50kΩ internal pullup and glitch rejection <100ns. Watchdog functionality is disabled by leaving WDI unconnected, leveraging a 200nA detection current source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.62V (min 1.575V, max 1.665V) - sets primary supply brownout detection point for 1.8V I/O rails |
| VCC2 Threshold | 0.788V (min 0.765V, max 0.810V) - enables core voltage supervision for sub-1V processors |
| Reset Timeout | 210ms (min 140ms, max 280ms) - ensures sufficient hold time for full system initialization after power recovery |
| Supply Current | 14µA typ at 3.6V - supports >10-year battery life in always-on IoT sensor nodes |
| RSTIN Reference | 626.5mV (±15.5mV) - allows precise third-voltage monitoring via external resistor divider |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V - ensures deterministic reset assertion during deep brownout |
Pinout & Package
MAX6727KATGD3 is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in portable electronics and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output referenced to VCC1; requires external pullup for logic-high state |
| 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 1µs minimum pulse width |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and RST2 output stage; valid from 0.8V–5.5V |
| 5 | VCC1 | Primary supply input powering core logic, VCC1 comparator, and RST output stage; valid from 0.8V–5.5V |
| 6 | RST2 | Active-low open-drain reset output referenced to VCC2; independent timing but shares same reset assertion logic as RST |
| 7 | RSTIN | High-impedance undervoltage monitor input with 626.5mV internal reference; enables third-supply monitoring down to 0.62V |
| 8 | PFO | Active-low open-drain power-fail output referenced to VCC1; asserts without timeout when PFI falls below 626.5mV (PFI not populated on MAX6727) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of 1.8V I/O rail (VCC1) and 0.9V core rail (VCC2) with separate thresholds and hysteresis |
| Adjustable third-supply monitor | RSTIN input with 626.5mV reference enables monitoring of auxiliary supplies (e.g., RTC battery, analog sensor rail) via resistor divider |
| Low-power operation | 14µA typical supply current at 3.6V supports multi-year battery life in always-on applications like smart meters and wearables |
| Brownout immunity | Guaranteed reset assertion down to VCC = 0.8V prevents spurious release during deep voltage sag |
| Noise-immune MR interface | 100ns glitch rejection and internal 50kΩ pullup eliminate need for external RC debounce in pushbutton reset circuits |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring 1.8V CAN transceiver supply and 0.85V MCU core voltage in harsh under-dash environments with wide temperature swings. IC Role / Device Role / Timing Role: Dual-voltage supervisor ensuring synchronized reset assertion across communication and processing domains during cold-crank events. Use Value: Prevents firmware lockup by asserting reset within 20µs of VCC2 drop below 0.788V and holding for 210ms to allow full MCU reinitialization. |
Use Scenario: Supervising 3.3V infotainment SoC I/O rail and 1.1V GPU core rail in head-unit designs subject to load-dump transients. IC Role / Device Role / Timing Role: Independent VCC1/VCC2 monitoring with 20ppm/°C tempco ensures stable thresholds across -40°C to +125°C operating range. Use Value: Guarantees reset remains valid down to 0.8V on either rail, enabling safe shutdown before data corruption occurs during battery voltage collapse. |
| Medical Wearable Sensors | Smart Energy Meters |
Use Scenario: Power sequencing for ultra-low-power ECG front-end (1.2V) and BLE radio (1.8V) powered from coin-cell battery. IC Role / Device Role / Timing Role: Dual-threshold supervisor with 14µA quiescent current minimizing battery drain while ensuring reliable wake-from-sleep reset. Use Value: Enables >5-year battery life with deterministic reset behavior during shallow discharge cycles where VCC sags to 1.6V. |
Use Scenario: Monitoring backup supercapacitor (2.7V) and main 3.3V supply in utility meter designs requiring 15-year field lifetime. IC Role / Device Role / Timing Role: RSTIN input configured to monitor supercap voltage via resistor divider, triggering graceful firmware save before power loss. Use Value: 626.5mV RSTIN reference allows precise 2.0V supercap fail threshold with <1% error over temperature, preventing data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726KATGD3 | Push-pull RST/RST2 outputs instead of open-drain; identical thresholds, timeout, and RSTIN spec | Eliminates need for external pullup resistors; better suited for driving CMOS inputs directly | Select MAX6726KATGD3 when interfacing with unidirectional reset pins or when board space prohibits pullup resistors |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input, no RSTIN, no PFO; 200ms timeout, 1.5µA IQ | Lacks dual-rail monitoring capability; suitable only for single-rail systems with ultra-low IQ requirement | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage applications where 14µA vs. 1.5µA matters and dual monitoring is unnecessary |
Compared with MAX6727KATGD3, MAX6726KATGD3 offers push-pull drive for simplified interface but forfeits open-drain flexibility for wired-OR reset buses; TPS3808G33DBVR reduces quiescent current by 90% but eliminates dual-supply and third-voltage monitoring entirely.
Availability
MAX6727KATGD3 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, medical wearables, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6727KATGD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory functions targeting space- and power-constrained embedded systems needing dual/three-rail monitoring with guaranteed operation down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6727KATGD3?
The MAX6727KATGD3 has a VCC1 reset threshold of 1.62V, with a guaranteed range of 1.575V (min) to 1.665V (max) at +25°C. This threshold is factory-trimmed and exhibits ±0.5% hysteresis and 20ppm/°C temperature coefficient, making it suitable for precise 1.8V rail supervision in industrial applications where voltage tolerance must remain within ±3%.
Does the MAX6727KATGD3 support monitoring a third voltage supply?
Yes, the MAX6727KATGD3 supports third-voltage monitoring via its RSTIN pin, which features a precise 626.5mV (±15.5mV) internal reference. By connecting an external resistor divider between the target supply and GND, designers can configure the trip point down to 0.62V - enabling supervision of auxiliary rails like RTC batteries, sensor analog supplies, or isolated DC-DC outputs without adding discrete components.
What is the function of Pin 8 (PFO) on the MAX6727KATGD3?
Pin 8 (PFO) on the MAX6727KATGD3 is an active-low open-drain power-fail output referenced to VCC1. Although the MAX6727 variant does not include the PFI input (unlike MAX6728/MAX6729), PFO remains functional as a secondary reset output or general-purpose open-drain signal driver. It asserts low simultaneously with RST/RST2 during reset events and deasserts immediately upon recovery - without timeout delay - allowing use as a fast power-fail interrupt signal.
How is watchdog functionality handled on the MAX6727KATGD3?
The MAX6727KATGD3 includes watchdog capability via the WDI pin, but it is disabled by default: leaving WDI unconnected activates an internal 200nA current source that detects the floating state and disables the timer. To enable watchdog monitoring, connect WDI to a processor GPIO and toggle it within 1.12s (min) normal timeout period after the initial 35s startup window. No external components are required for basic watchdog operation.
What package type and dimensions does the MAX6727KATGD3 use?
The MAX6727KATGD3 uses an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm with standard gull-wing leads. This compact outline supports high-density PCB layouts in portable and automotive applications. The device is RoHS-compliant and rated for operation from -40°C to +125°C, with thermal resistance θJA = 220°C/W - requiring minimal copper area for thermal management in most implementations.
MAX6727KATGD3 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:
- 1.11V, 3.075V, 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
MAX6727KATGD3 FAQ
1.How can I place an order for MAX6727KATGD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KATGD3 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 MAX6727KATGD3 reliable?
The price and inventory of MAX6727KATGD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KATGD3 is usually 5 days.
3.What payment methods are accepted for MAX6727KATGD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727KATGD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727KATGD3?
MAX6727KATGD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KATGD3 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 MAX6727KATGD3?
For technical support, including MAX6727KATGD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KATGD3 requirements.
6.How does Aetrix verify that MAX6727KATGD3 is sourced from the original manufacturer or authorized distributors?
All MAX6727KATGD3 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 MAX6727KATGD3 meets industry standards.
7.What is the process for return or replacement of MAX6727KATGD3?
All MAX6727KATGD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KATGD3, 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 MAX6727KATGD3 part is unused and in its original packaging.
Return procedure for MAX6727KATGD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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