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Analog Devices Inc./Maxim Integrated MAX6727AKAWGD3+
- Part No.:
- MAX6727AKAWGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727AKAWGD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
MAX6727AKAWGD3+ 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, push-pull active-low RST output, and adjustable RSTIN input for third-voltage monitoring down to 0.626V - used in battery-powered industrial controllers to ensure reliable power-on reset and brownout recovery.
For engineers reviewing the MAX6727AKAWGD3+ datasheet, MAX6727AKAWGD3+ pinout, MAX6727AKAWGD3+ application, or MAX6727AKAWGD3+ equivalent, key selection criteria include guaranteed reset validity down to VCC = 0.8V, 14µA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and compatibility with manual-reset, watchdog, and power-fail signaling in compact embedded systems.
Technical Context
The MAX6727AKAWGD3+ implements dual independent voltage comparators with factory-trimmed thresholds (VTH1 = 1.62V, VTH2 = 0.788V), hysteresis of 0.5%, and temperature coefficient of 20ppm/°C. It integrates a 210ms minimum reset timeout timer that restarts on any threshold violation before expiration.
This variant includes push-pull RST output referenced to VCC1, active-low manual-reset input (MR) with 50kΩ internal pullup, and RSTIN comparator with 626.5mV internal reference - enabling precise third-supply monitoring via external resistor divider without loading the monitored rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.62V (typ), factory-trimmed falling threshold for primary supply monitoring - ensures deterministic reset assertion during 1.8V rail brownout |
| VCC2 Threshold | 0.788V (typ), factory-trimmed falling threshold for secondary supply - supports reliable supervision of 0.9V core rails |
| Reset Timeout | 210ms (min), fixed delay after all supplies recover - provides sufficient hold time for FPGA configuration or flash boot sequence |
| Supply Current | 14µA (typ) at 3.6V - enables multi-year operation in coin-cell–powered IoT edge nodes |
| RSTIN Reference | 626.5mV (typ), high-impedance input reference - allows monitoring of auxiliary voltages as low as 0.62V using standard resistor dividers |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V - ensures correct logic state during deep brownout conditions before full power collapse |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control cabinet deployment |
Pinout & Package
MAX6727AKAWGD3+ is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low push-pull reset output referenced to VCC1 - drives µP reset pin directly without external pullup |
| 2 | GND | Ground reference for all internal comparators and logic - must be connected to system ground plane |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1 - momentary switch to GND initiates system reset |
| 4 | PFO | Active-low power-fail output (push-pull) referenced to VCC1 - signals early power degradation without reset assertion |
| 5 | RSTIN | Adjustable reset comparator input with 626.5mV internal reference - monitors third supply via resistor divider (e.g., 3.3V → 0.626V) |
| 6 | VCC2 | Secondary supply input (0.8V–5.5V) - powers internal circuitry when above VCC1 and sets VTH2 threshold |
| 7 | PFI | Power-fail monitor input with 626.5mV reference - enables early warning of preregulated supply collapse (e.g., battery voltage drop) |
| 8 | VCC1 | Primary supply input (0.8V–5.5V) - powers device when above VCC2 and sets VTH1 threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous monitoring of 1.8V I/O rail (VCC1) and 0.9V core rail (VCC2) with separate thresholds and hysteresis |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise supervision of auxiliary rails (e.g., 2.5V, 3.3V) using two standard resistors |
| Push-pull RST output | Eliminates need for external pullup resistor - reduces BOM count and PCB footprint in space-constrained designs |
| 210ms reset timeout | Fixed minimum delay ensures µP completes power-up initialization before release - prevents premature execution |
| 0.8V reset validity guarantee | Ensures RST remains asserted even as VCC1 or VCC2 decays below 1.0V - critical for orderly shutdown sequencing |
Applications
| Battery-Powered Telematics Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Compact telematics unit powered by Li-ion battery with 3.3V DC-DC and 1.2V core regulator. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either 3.3V I/O rail drops below 3.075V or 1.2V core falls below 1.11V, holding reset for 210ms after recovery. Use Value: Prevents MCU lockup during battery voltage sag; RSTIN monitors battery voltage directly for graceful shutdown at 3.2V. |
Use Scenario: DIN-rail mounted PLC module with isolated 24V input, 5V logic, and 3.3V FPGA supply. IC Role / Device Role / Timing Role: Supervises 5V logic rail (VCC1) and 3.3V FPGA rail (VCC2), while PFI monitors 24V input pre-regulator for early brownout warning. Use Value: Enables deterministic FPGA reconfiguration after power interruption; PFO triggers firmware-controlled safe I/O deactivation before main reset. |
| Medical Point-of-Care Sensor Hub | Automotive Body Control Module |
Use Scenario: Portable sensor hub with dual LDOs powering analog front-end (1.8V) and BLE SoC (3.0V). IC Role / Device Role / Timing Role: Monitors both LDO outputs with factory-trimmed thresholds (1.62V/0.788V), asserts push-pull RST to SoC reset pin, and uses MR for clinical reset button. Use Value: Guarantees clean boot after battery insertion; 14µA quiescent current extends single-charge runtime beyond 12 months. |
Use Scenario: Under-dash BCM with 12V input, 5V microcontroller rail, and 3.3V CAN transceiver rail. IC Role / Device Role / Timing Role: Supervises 5V MCU supply and 3.3V CAN supply; RSTIN monitors switched 12V ignition line to detect key-off transition. Use Value: Ensures MCU reset during cranking-induced 5V dip; RSTIN-triggered reset enables immediate wake-from-sleep on key insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726AKAWGD3+ | Identical pinout and electrical specs, but open-drain RST output requiring external pullup resistor | Suitable where level-shifting or wired-OR reset bus is required; not direct replacement if push-pull drive is needed | Select MAX6726AKAWGD3+ only when open-drain topology matches system reset bus architecture |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), no VCC2 or RSTIN inputs, 200ms timeout, 1.6µA IQ | Lacks dual-rail monitoring capability; cannot replace MAX6727AKAWGD3+ in systems requiring independent 1.8V/0.9V supervision | Consider only for simplified single-rail applications where cost and ultra-low IQ outweigh dual-monitoring requirement |
Compared with MAX6726AKAWGD3+, the MAX6727AKAWGD3+ eliminates external pullup components and simplifies layout; versus TPS3808G33DBVR, it delivers essential dual-rail supervision and auxiliary voltage monitoring at the cost of higher quiescent current - making it indispensable for complex mixed-voltage embedded systems.
Availability
MAX6727AKAWGD3+ is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical sensor hubs, and battery-powered telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6727AKAWGD3+ 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 MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for systems with multiple power domains - enabling reliable reset generation, brownout detection, and power-fail warning in space- and power-constrained embedded platforms.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6727AKAWGD3+?
The MAX6727AKAWGD3+ has a factory-trimmed VCC1 reset threshold of 1.62V (typical), with min/max values of 1.530V/1.620V over temperature. This value is encoded in the "KA" suffix per Maxim's Reset Voltage Threshold Suffix Guide and applies specifically to the MAX6727AKAWGD3+ variant - not the broader MAX6727A family.
Does MAX6727AKAWGD3+ support monitoring a third voltage supply?
Yes, MAX6727AKAWGD3+ supports third-voltage monitoring via its RSTIN pin, which features a 626.5mV internal reference. By connecting an external resistor divider from the target supply to RSTIN and GND, users can set custom trip points - for example, monitoring a 3.3V rail with a 5.3:1 divider to trigger reset at 3.3V × (626.5mV / 3.3V) ≈ 0.626V at RSTIN.
What is the function of the PFI and PFO pins on MAX6727AKAWGD3+?
On MAX6727AKAWGD3+, PFI is a high-impedance input for the power-fail comparator (reference = 626.5mV), while PFO is its active-low push-pull output. When PFI voltage falls below 626.5mV - e.g., due to battery decay or pre-regulator failure - PFO asserts immediately without reset timeout, enabling firmware to initiate controlled shutdown before main reset occurs.
Can MAX6727AKAWGD3+ operate with VCC1 below 1.0V?
Yes, MAX6727AKAWGD3+ guarantees valid reset output logic states down to VCC1 = 0.8V or VCC2 = 0.8V. Below this, the internal comparators and timer may become indeterminate. For applications requiring reset assertion all the way to 0V, Maxim recommends adding an external pulldown resistor (e.g., 100kΩ) from RST to GND - but only for push-pull variants like MAX6727AKAWGD3+.
How does the manual-reset input (MR) behave on MAX6727AKAWGD3+?
The MR pin on MAX6727AKAWGD3+ is active-low with an internal 50kΩ pullup to VCC1. Pulling MR low forces immediate reset assertion; reset remains active for the full 210ms timeout period after MR returns high. If unused, MR may be left floating or tied to VCC1 - no external components are required, and the input rejects glitches shorter than 100ns.
MAX6727AKAWGD3+ 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, 1.665V, 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
MAX6727AKAWGD3+ FAQ
1.How can I place an order for MAX6727AKAWGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727AKAWGD3+ 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 MAX6727AKAWGD3+ reliable?
The price and inventory of MAX6727AKAWGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727AKAWGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6727AKAWGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727AKAWGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727AKAWGD3+?
MAX6727AKAWGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727AKAWGD3+ 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 MAX6727AKAWGD3+?
For technical support, including MAX6727AKAWGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727AKAWGD3+ requirements.
6.How does Aetrix verify that MAX6727AKAWGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6727AKAWGD3+ 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 MAX6727AKAWGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6727AKAWGD3+?
All MAX6727AKAWGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727AKAWGD3+, 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 MAX6727AKAWGD3+ part is unused and in its original packaging.
Return procedure for MAX6727AKAWGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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