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Analog Devices Inc./Maxim Integrated MAX6727KATGD3+T
- Part No.:
- MAX6727KATGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6727KATGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,127
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Product details
Overview
MAX6727KATGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory IC monitoring VCC1 (primary), VCC2 (secondary), and an externally adjustable RSTIN input down to 0.626V. It asserts active-low open-drain reset outputs with 210ms minimum timeout, operates from -40°C to +85°C, and draws only 14µA typical supply current at 3.6V - designed for reliable power sequencing in multivoltage embedded systems.
For engineers reviewing the MAX6727KATGD3+T datasheet, MAX6727KATGD3+T pinout, MAX6727KATGD3+T application, or MAX6727KATGD3+T equivalent, key selection criteria include dual independent open-drain RST outputs, factory-trimmed VCC1/VCC2 thresholds, RSTIN-adjustable third-voltage monitoring, watchdog timer support, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V.
Technical Context
The MAX6727KATGD3+T integrates three independent voltage monitors: VCC1 (1.53V–4.75V factory-trimmed thresholds), VCC2 (0.765V–3.15V), and RSTIN referenced to a precise 626.5mV internal bandgap. Its dual open-drain RST outputs share identical logic but drive separate pins, enabling independent reset signaling to multiple system domains.
It features a dual-mode watchdog timer with 35s minimum startup period and 1.12s minimum normal timeout, manual reset input with 50kΩ internal pullup, and supports power-fail detection via RSTIN (shared with auxiliary voltage monitoring). All functions operate reliably with VCC1 or VCC2 ≥ 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion during primary supply brownout in 5V/3.3V systems |
| VCC2 Threshold | 3.075V (typ), factory-trimmed - monitors secondary rail such as I/O supply or auxiliary domain |
| RSTIN Threshold | 626.5mV (typ) - enables precise external resistor-divider setup for third-voltage monitoring down to 0.62V |
| Reset Timeout | 210ms (min) - provides sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent power in battery-backed or energy-sensitive applications |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
| Reset Output | Dual open-drain RST - allows flexible pullup configuration and independent reset control of two subsystems |
Pinout & Package
MAX6727KATGD3+T is housed in an 8-pin SOT23-8 package with exposed pad (thermal enhancement), footprint-compatible with industry-standard 8-pin SOT packages and suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | RST / RST1 | Active-low open-drain reset output - asserted when VCC1, VCC2, or RSTIN falls below threshold; requires external pullup |
| 2 | GND | Ground reference for all internal circuitry and reset output drivers |
| 3 | MR | Active-low manual reset input - internal 50kΩ pullup to VCC1; forces reset when pulled low |
| 5 | RSTIN | Adjustable undervoltage monitor input - compares external voltage to 626.5mV reference; enables third-rail supervision |
| 6 | VCC2 | Secondary supply input - powers internal circuitry when > VCC1 and sets VCC2 reset threshold range |
| 7 | VCC1 | Primary supply input - powers device when > VCC2 and defines main reset threshold and timing references |
| 8 | RST2 | Second active-low open-drain reset output - identical logic to RST/RST1 but electrically isolated pin for dual-domain reset control |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent open-drain RST outputs | Enables simultaneous but isolated reset signaling to CPU and FPGA, or core and I/O domains without contention |
| Externally adjustable RSTIN threshold (626.5mV ref) | Supports monitoring of any DC rail ≥ 0.62V using resistor divider - eliminates need for additional supervisor ICs |
| Guaranteed reset validity down to VCC = 0.8V | Ensures deterministic reset behavior during deep brownout conditions where many supervisors fail silently |
| Dual-mode watchdog timer (35s startup / 1.12s normal) | Accommodates long boot sequences while maintaining tight fault-detection latency during runtime |
| Immunity to short VCC transients | Rejects sub-20µs glitches at typical overdrive levels - prevents spurious resets in noisy power environments |
Applications
| Industrial PLC Controller | 5G Small Cell Baseband Unit |
|---|---|
|
Use Scenario: Monitors 3.3V core, 1.8V I/O, and 12V DC-DC feedback rail in a fanless, convection-cooled controller. IC Role / Device Role / Timing Role: Triple-voltage supervisor ensuring synchronized reset across CPU, FPGA, and analog front-end during cold start and brownout. Use Value: Dual RST outputs isolate reset propagation paths, preventing lockup if one subsystem fails to release reset. |
Use Scenario: Supervises 5V bias, 3.3V management, and -48V backplane supply in compact outdoor radio unit. IC Role / Device Role / Timing Role: RSTIN monitors negative rail via resistor network; VCC1/VCC2 track positive rails; watchdog guards firmware execution. Use Value: 626.5mV precision reference enables accurate -48V fail detection without external op-amps or comparators. |
| Battery-Powered Medical Sensor Hub | Network-Attached Storage (NAS) Controller |
|
Use Scenario: Manages Li-ion (3.6V), LDO-out (2.5V), and backup coin-cell (3.0V) supplies in ultra-low-power wearable gateway. IC Role / Device Role / Timing Role: Low 14µA ICC ensures minimal battery drain; 210ms timeout accommodates slow-starting RF transceiver. Use Value: Guaranteed operation down to 0.8V per rail extends functional uptime during end-of-battery discharge. |
Use Scenario: Controls power sequencing of ARM SoC (1.1V), DDR4 memory (1.2V), and SATA PHY (3.3V) in multi-bay NAS. IC Role / Device Role / Timing Role: Dual RST outputs coordinate reset between SoC and storage controller; MR enables hardware-initiated recovery. Use Value: Factory-trimmed thresholds eliminate calibration overhead; open-drain outputs interface directly with 1.1V I/O domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6728KA-T | Includes PFO (power-fail output); same RSTIN, VCC1/VCC2 thresholds, and dual RST outputs | Required when early power-fail interrupt (not reset) is needed before brownout - e.g., for graceful shutdown | Select MAX6728KA-T if PFI/PFO functionality is required; otherwise MAX6727KATGD3+T offers identical supervision with lower pin count |
| TPS3808G33DBVR | Single-supply monitor (VDD only); no RSTIN or dual RST; 3.3V fixed threshold; push-pull RST | Suitable only for single-rail systems; lacks triple-monitoring, adjustable input, or dual-reset capability | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage designs where RSTIN and dual RST are unnecessary |
Compared with MAX6728KA-T, MAX6727KATGD3+T omits PFO but retains identical triple-monitoring accuracy and dual-RST isolation; versus TPS3808G33DBVR, it delivers full triple-rail supervision with design flexibility unattainable in single-threshold devices.
Availability
MAX6727KATGD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, 5G small cell baseband units, and battery-powered medical sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6727KATGD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was engineered to replace discrete reset solutions in space-constrained multivoltage systems - delivering integrated triple-supply monitoring, watchdog, and manual reset in sub-3mm² SOT packages.
FAQ
What is the exact reset timeout period for MAX6727KATGD3+T?
The MAX6727KATGD3+T has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This value is factory-trimmed and guaranteed over the full -40°C to +85°C operating temperature range. The actual timeout may vary slightly due to process and temperature, but remains within specification limits defined in the datasheet's Electrical Characteristics table.
Does MAX6727KATGD3+T support monitoring a negative supply voltage?
Yes, MAX6727KATGD3+T can monitor negative supplies using the RSTIN pin with an appropriate resistor-divider network configured per Figure 1 in the datasheet. Since RSTIN compares against a fixed 626.5mV internal reference, connecting a negative rail through resistive scaling allows accurate undervoltage detection - commonly used for -48V telecom or industrial bus monitoring.
How are the two RST outputs on MAX6727KATGD3+T related?
Both RST (pin 1) and RST2 (pin 8) on MAX6727KATGD3+T are active-low open-drain outputs driven by identical internal logic. They assert simultaneously under the same conditions - VCC1/VCC2/RSTIN fault, MR activation, or watchdog timeout - but provide physically separate pins to avoid routing conflicts and enable independent pullup configurations for different voltage domains.
What is the function of the MR pin on MAX6727KATGD3+T?
The MR (Manual Reset) pin on MAX6727KATGD3+T is an active-low input with an internal 50kΩ pullup to VCC1. Pulling MR low forces an immediate reset assertion, which remains active for the full 210ms timeout period after MR returns high. It supports TTL/CMOS logic levels and requires no external components - ideal for pushbutton reset or system-level fault recovery signaling.
Can MAX6727KATGD3+T operate with VCC1 and VCC2 at different voltages?
Yes, MAX6727KATGD3+T is explicitly designed for asymmetric supply monitoring: VCC1 accepts 1.53V–4.75V (e.g., 3.3V), while VCC2 accepts 0.765V–3.15V (e.g., 1.8V or 2.5V). The device powers itself from whichever supply is higher and independently monitors both thresholds - essential for modern multirail SoC and FPGA power architectures.
MAX6727KATGD3+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, 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+T FAQ
1.How can I place an order for MAX6727KATGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6727KATGD3+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 MAX6727KATGD3+T reliable?
The price and inventory of MAX6727KATGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6727KATGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6727KATGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6727KATGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6727KATGD3+T?
MAX6727KATGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6727KATGD3+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 MAX6727KATGD3+T?
For technical support, including MAX6727KATGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6727KATGD3+T requirements.
6.How does Aetrix verify that MAX6727KATGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6727KATGD3+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 MAX6727KATGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6727KATGD3+T?
All MAX6727KATGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6727KATGD3+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 MAX6727KATGD3+T part is unused and in its original packaging.
Return procedure for MAX6727KATGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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