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Analog Devices Inc./Maxim Integrated MAX6727AKASDD3+T
- Part No.:
- MAX6727AKASDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727AKASDD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6727AKASDD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit with externally adjustable third-voltage monitoring (RSTIN), push-pull active-low reset output, and 280ms minimum reset timeout. It monitors VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed thresholds, guarantees valid reset down to VCC1 or VCC2 = 0.8V, and operates across –40°C to +125°C. It is used in multivoltage embedded systems requiring reliable power sequencing and brownout detection.
For engineers reviewing the MAX6727AKASDD3+T datasheet, MAX6727AKASDD3+T pinout, MAX6727AKASDD3+T application, or MAX6727AKASDD3+T equivalent, key selection criteria include its dual-supply monitoring capability, RSTIN-adjustable threshold (626.5mV typ), 280ms reset timeout, push-pull RST output referenced to VCC1, and SOT23-6 package compatibility with high-temperature industrial designs.
Technical Context
The MAX6727AKASDD3+T integrates dual independent voltage comparators for VCC1 and VCC2, an adjustable RSTIN comparator with 626.5mV internal reference, and a programmable reset timeout timer. Its reset logic asserts RST low when any monitored supply falls below its threshold or when MR is pulled low, maintaining assertion for exactly 280ms (min) after all conditions recover.
It features a push-pull RST output referenced to VCC1, supports manual reset via internal 50kΩ pullup on MR, and includes watchdog disable-by-open functionality (WDI unconnected). The device uses no external components for basic operation and maintains guaranteed reset validity even as VCC1 or VCC2 drops to 0.8V - critical for fail-safe brownout response in automotive and industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Range | 0.8V to 5.5V - powers device and enables primary supply monitoring down to ultralow voltages |
| VCC2 Range | 0.8V to 5.5V - powers secondary monitoring path and supports core supply tracking (e.g., 1.2V, 1.8V) |
| RSTIN Threshold | 611mV to 642mV - fixed internal reference enabling precise third-voltage monitoring via resistor divider |
| Reset Timeout (tRP) | 280ms (min) - ensures sufficient hold time for full system initialization after power recovery |
| Supply Current (ICC1) | 10µA (typ) at 3.6V - ultra-low quiescent current extends battery life in portable equipment |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup and provides rail-to-rail drive into μP reset pin |
Pinout & Package
MAX6727AKASDD3+T is housed in a 6-pin SOT23 package (package code U6+1A, outline 21-0058), with thermal resistance θJA = 115°C/W on multilayer board. Pin functions are validated per Maxim's official pin description table for MAX6727A variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on fault and holds for 280ms min |
| 2 | GND | System ground reference for all comparators, timers, and output drivers |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; resets system on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and RST2 logic (not used in MAX6727A) |
| 5 | VCC1 | Primary supply input powering core logic, RST driver, and VCC1 comparator |
| 6 | RSTIN | Adjustable undervoltage monitor input; triggers reset when voltage falls below 626.5mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (1.8–5.0V) and VCC2 (0.9–3.3V) supervision with separate thresholds and hysteresis |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise monitoring of auxiliary rails (e.g., 3.3V, 2.5V, 1.2V) via resistor divider |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset behavior during deep brownout - no undefined output states below 0.8V on either supply |
| 280ms minimum reset timeout | Provides robust hold time for complex μP boot sequences and peripheral initialization without external RC timing |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and delivers strong low-state drive (≤0.3V @ 1.2mA sink) |
Applications
| Industrial PLC Power Management | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring 5V main logic rail and 3.3V microcontroller core supply in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low reset to ARM Cortex-M7 during simultaneous VCC1/VCC2 brownout or startup sequencing failure. Use Value: Prevents erratic firmware execution by guaranteeing 280ms reset hold time and valid reset state down to 0.8V - critical for SIL-2 functional safety compliance. |
Use Scenario: Supervising 12V-derived 5V system rail and 1.2V SoC core supply in vehicle body control units operating from –40°C to +125°C. IC Role / Device Role / Timing Role: Primary power integrity monitor triggering reset on VCC1 sag or VCC2 collapse, with RSTIN used to track backup battery voltage (via divider). Use Value: Enables fail-safe shutdown before memory corruption occurs; push-pull RST drives μP reset pin directly without pullup, reducing layout sensitivity. |
| Medical Infusion Pump Controller | Telecom Remote Radio Unit (RRU) |
Use Scenario: Ensuring safe power-up and brownout response in battery-powered infusion pumps where incorrect motor actuation must be prevented. IC Role / Device Role / Timing Role: Dual-rail supervisor monitoring main 3.3V MCU supply and 2.5V analog sensor rail; MR pin connected to emergency stop switch. Use Value: Ultra-low 10µA supply current extends battery runtime; 280ms timeout allows full ADC calibration and motor self-test before release. |
Use Scenario: Monitoring distributed 48V-to-12V DC/DC output (VCC1) and FPGA core supply (VCC2) in outdoor 5G radio units subject to thermal cycling. IC Role / Device Role / Timing Role: Fault detector asserting reset on VCC1 droop or VCC2 collapse; RSTIN configured to monitor 3.3V management controller supply. Use Value: Valid reset down to 0.8V prevents latch-up during cold-start transients; SOT23-6 footprint fits tight PCB space constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726AKASDD3+T | Identical pinout and package, but features open-drain RST output instead of push-pull | Requires external pullup resistor; suitable where level-shifting or wired-OR reset bus is needed | Select MAX6726AKASDD3+T only if system requires open-drain reset for bus sharing or voltage translation |
| TPS3808G33DBVR | Single-supply supervisor (monitors only VCC); 3.3V fixed threshold; 200ms timeout; SOT23-6 | Lacks VCC2 and RSTIN inputs - cannot replace dual/third-voltage monitoring function | Use only as cost-optimized alternative in single-rail systems where VCC2/RSTIN are unused |
Compared with MAX6726AKASDD3+T and TPS3808G33DBVR, MAX6727AKASDD3+T uniquely delivers push-pull RST, dual-supply monitoring, and RSTIN adjustability in one SOT23-6 device - eliminating design compromises in multivoltage industrial and automotive controllers.
Availability
MAX6727AKASDD3+T is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, telecom remote radio units, and battery-operated edge devices requiring stable component supply across extended temperature ranges.
Supply support for MAX6727AKASDD3+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 demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multivoltage embedded systems requiring guaranteed reset validity, minimal quiescent current, and compact SOT23 packaging.
FAQ
What is the reset timeout period of MAX6727AKASDD3+T?
The MAX6727AKASDD3+T has a guaranteed minimum reset timeout period of 280ms. This value is factory-trimmed and specified in the Reset Timeout Period Suffix Guide as "D3". The timeout begins when all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and ends 280ms later - ensuring sufficient hold time for full μP initialization before release. MAX6727AKASDD3+T does not support user-programmable timeout adjustment.
Does MAX6727AKASDD3+T support monitoring three voltage rails?
Yes, MAX6727AKASDD3+T monitors two dedicated rails (VCC1 and VCC2) and provides an adjustable third-rail input via RSTIN, which references a precise 626.5mV internal threshold. By connecting an external resistor divider to RSTIN, designers can monitor auxiliary supplies such as 3.3V, 2.5V, or 1.2V. This makes MAX6727AKASDD3+T functionally a triple-supply supervisor despite its dual-comparator architecture.
What is the function of the MR pin on MAX6727AKASDD3+T?
The MR (Manual Reset) pin on MAX6727AKASDD3+T is an active-low input with an internal 50kΩ pullup to VCC1. Pulling MR low forces an immediate reset assertion on the RST output, which remains active for the full 280ms timeout period after MR returns high. This enables hardware-initiated resets via pushbuttons or system-level fault signals. If unused, MR may be left floating or tied to VCC1 - no external components are required.
Can MAX6727AKASDD3+T operate with VCC1 below 1.8V?
Yes, MAX6727AKASDD3+T is fully specified to operate with VCC1 as low as 0.8V. Its internal comparators, timer, and push-pull RST driver maintain guaranteed functionality and valid logic states across this range. This capability is essential for modern low-voltage microcontrollers and SoCs that boot from sub-1V supplies. The datasheet explicitly guarantees reset validity down to VCC1 = 0.8V - a key differentiator versus many competing supervisors.
What package type is used for MAX6727AKASDD3+T?
MAX6727AKASDD3+T is packaged in a 6-pin SOT23 case (package code U6+1A, JEDEC outline 21-0058). This RoHS-compliant surface-mount package measures 2.9mm × 1.6mm × 1.1mm and supports reflow soldering. Its small footprint and thermal performance (θJA = 115°C/W on multilayer board) make it ideal for space-constrained industrial and automotive PCBs where thermal reliability is critical.
MAX6727AKASDD3+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:
- 0.788V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6727AKASDD3+T FAQ
1.How can I place an order for MAX6727AKASDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727AKASDD3+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 MAX6727AKASDD3+T reliable?
The price and inventory of MAX6727AKASDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727AKASDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6727AKASDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727AKASDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727AKASDD3+T?
MAX6727AKASDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727AKASDD3+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 MAX6727AKASDD3+T?
For technical support, including MAX6727AKASDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727AKASDD3+T requirements.
6.How does Aetrix verify that MAX6727AKASDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6727AKASDD3+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 MAX6727AKASDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6727AKASDD3+T?
All MAX6727AKASDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727AKASDD3+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 MAX6727AKASDD3+T part is unused and in its original packaging.
Return procedure for MAX6727AKASDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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