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Analog Devices Inc./Maxim Integrated MAX6724UTSYD3
- Part No.:
- MAX6724UTSYD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTSYD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,057
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Product details
Overview
MAX6724UTSYD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC monitoring VCC1 (primary) and VCC2 (secondary) supply rails, with factory-trimmed reset thresholds of 3.075V (VTH1) and 2.925V (VTH2), 210ms minimum reset timeout, push-pull active-low RST output, and integrated watchdog timer (1.12s normal mode). It ensures reliable system reset in multivoltage embedded systems such as telecom power management and industrial controllers.
For engineers reviewing the MAX6724UTSYD3 datasheet, MAX6724UTSYD3 pinout, MAX6724UTSYD3 application, or MAX6724UTSYD3 equivalent, key selection criteria include its guaranteed reset validity down to VCC1/VCC2 = 0.8V, ultra-low 14µA typical supply current at 3.6V, dual-supply monitoring capability, watchdog disable via open WDI, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6724UTSYD3 implements independent voltage comparators for VCC1 and VCC2, each with ±0.5% hysteresis and 20ppm/°C tempco, asserting reset when either supply falls below its trimmed threshold. Its internal watchdog operates in dual-mode: 35s startup period after reset, then 1.12s normal timeout-triggered by missing edges on WDI.
Reset assertion is latched for a fixed 210ms (min) timeout; if VCC1 or VCC2 dips below threshold again before timeout completion, the timer restarts. The push-pull RST output is referenced to VCC1 and sinks ≥1.2mA at 2.7V, while MR input features a 50kΩ internal pullup and 1µs minimum pulse width requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075V (factory-trimmed, ±0.075V tolerance) - sets primary supply brownout detection point |
| VCC2 Reset Threshold | 2.925V (factory-trimmed, ±0.075V tolerance) - sets secondary supply brownout detection point |
| Reset Timeout Period | 210ms (minimum) - guarantees processor reset hold time for safe initialization |
| Supply Current | 14µA typical at 3.6V - enables battery-backed or low-power always-on monitoring |
| Operating Temperature | -40°C to +125°C - supports automotive under-hood and industrial control environments |
| Watchdog Timeout | 1.12s (normal mode, min) - provides rapid fault detection during runtime after boot |
| Reset Output Type | Push-pull, active-low - eliminates need for external pullup and drives directly into µP reset pin |
Pinout & Package
MAX6724UTSYD3 is housed in a RoHS-compliant 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), rated for -40°C to +125°C operation. Pin functions are validated per Maxim's official pin description table for MAX6723A/MAX6724A variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2 < threshold or MR pulled low |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core and sets RST output reference |
| 6 | WDI | Watchdog input; rising/falling edge resets 1.12s timeout; open connection disables watchdog |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 and VCC2 supervision with separate factory-trimmed thresholds avoids single-point failure |
| Guaranteed reset validity to 0.8V | Ensures correct reset state even during deep brownout-critical for fail-safe shutdown in power-sensitive systems |
| Watchdog with long startup + short runtime timeout | 35s initial window accommodates complex boot sequences; 1.12s runtime timeout catches hung firmware |
| Immunity to short VCC transients | Rejects glitches ≤20µs (at 100mV overdrive), preventing spurious resets in noisy power environments |
| Low 14µA supply current | Enables permanent monitoring in battery-powered equipment without significant drain impact |
Applications
| Telecom Power Management | Industrial PLC Controllers |
|---|---|
Use Scenario: Monitoring dual DC-DC outputs (e.g., 3.3V core and 2.5V I/O rails) in 48V-powered telecom line cards. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail drops below 3.075V or 2.925V, with 210ms hold time for FPGA reconfiguration. Use Value: Prevents corrupted configuration writes during partial power loss-ensuring deterministic recovery without field intervention. |
Use Scenario: Ensuring safe startup and runtime integrity of programmable logic controllers operating in factory-floor environments with fluctuating 24V supplies. IC Role / Device Role / Timing Role: Supervising primary 5V logic rail and secondary 3.3V communication interface rail; watchdog monitors main CPU activity. Use Value: Guarantees controlled reboot upon firmware hang or undervoltage, meeting SIL-2 functional safety requirements for process automation. |
| Automotive Infotainment Systems | Portable Medical Devices |
Use Scenario: Managing power sequencing and fault response in head-unit ECUs with separate 5V MCU, 3.3V display, and 1.8V memory rails. IC Role / Device Role / Timing Role: Primary supervisor for VCC1 (5V) and VCC2 (3.3V); MR pin tied to ignition switch for cold-start reset. Use Value: AEC-Q100-compatible design (per MAX6719AUTTWD1/V+T variant family) ensures reliability across temperature extremes (-40°C to +125°C). |
Use Scenario: Battery-operated glucose meters requiring continuous voltage monitoring of coin-cell (3V) and regulated 1.8V sensor rails during measurement cycles. IC Role / Device Role / Timing Role: Low-current (14µA typ) dual-rail supervisor enabling multi-year battery life while guaranteeing reset on battery depletion. Use Value: Eliminates risk of erroneous readings due to marginal supply-critical for FDA-cleared diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6723UTSYD3 | Identical pinout and package; differs only in reset thresholds (VTH1 = 2.925V, VTH2 = 2.625V) | Suitable where lower secondary rail threshold is required (e.g., 2.5V systems) | Select when matching specific VCC2 nominal voltage; otherwise MAX6724UTSYD3 is preferred for 3.0V/2.9V dual-rail setups. |
| TPS3808G33DBVR | Single-supply supervisor (monitors only VCC); no VCC2 input or WDI; 3.3V fixed threshold; 200ms timeout | Lacks dual-rail capability and watchdog-requires external circuitry for multi-rail systems | Use only for simple single-rail applications; not a drop-in replacement for MAX6724UTSYD3's dual-monitoring function. |
Compared with MAX6724UTSYD3, MAX6723UTSYD3 offers matched form-factor and timing but shifted thresholds for tighter 2.5V system margins, while TPS3808G33DBVR reduces cost and complexity in single-rail designs but sacrifices dual-supply supervision and watchdog functionality essential for robust embedded control.
Availability
MAX6724UTSYD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply, extended temperature operation, and dual-rail fault detection.
Supply support for MAX6724UTSYD3 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 demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family was designed specifically for ultra-low-voltage, multirail microprocessor supervision in space- and power-constrained systems-emphasizing guaranteed reset behavior down to 0.8V and minimal quiescent current.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6724UTSYD3?
The MAX6724UTSYD3 has factory-trimmed reset thresholds of 3.075V (±0.075V) for VCC1 and 2.925V (±0.075V) for VCC2, as defined by the 'SY' suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are measured at 25°C with ±20ppm/°C tempco, ensuring stability across the full -40°C to +125°C operating range.
Does the MAX6724UTSYD3 support watchdog functionality, and how is it configured?
Yes, the MAX6724UTSYD3 includes a dual-mode watchdog timer with a 35s minimum startup period after reset and a 1.12s minimum normal-mode timeout. It is enabled by connecting WDI (pin 6) to a microprocessor I/O line that toggles regularly; leaving WDI unconnected disables the watchdog entirely, as confirmed in the Functional Diagram and Watchdog Input section of the datasheet.
What package type and pin count does the MAX6724UTSYD3 use?
The MAX6724UTSYD3 uses a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and tape-and-reel packaged. This matches the MAX6723A/MAX6724A variant group specified in the Selector Guide, with validated pinout including RST, GND, MR, VCC2, VCC1, and WDI-no alternate packages are offered for this specific part number.
Can the MAX6724UTSYD3 monitor a third voltage rail?
No, the MAX6724UTSYD3 is a dual-supply supervisor and does not include the RSTIN input required for auxiliary voltage monitoring. That feature is reserved for variants like MAX6723A–MAX6727A (which have RSTIN on pin 5). The MAX6724UTSYD3 pinout omits RSTIN and instead dedicates pin 6 exclusively to WDI, confirming its two-rail + watchdog architecture.
What is the minimum supply voltage at which the MAX6724UTSYD3 guarantees valid reset output logic?
The MAX6724UTSYD3 guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V, per the Absolute Maximum Ratings and Detailed Description sections. This allows safe reset assertion during deep brownout conditions where other supervisors may fail-critical for fail-safe shutdown in industrial and automotive applications.
MAX6724UTSYD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.188V, 2.925V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6724UTSYD3 FAQ
1.How can I place an order for MAX6724UTSYD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTSYD3 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 MAX6724UTSYD3 reliable?
The price and inventory of MAX6724UTSYD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTSYD3 is usually 5 days.
3.What payment methods are accepted for MAX6724UTSYD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTSYD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTSYD3?
MAX6724UTSYD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTSYD3 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 MAX6724UTSYD3?
For technical support, including MAX6724UTSYD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTSYD3 requirements.
6.How does Aetrix verify that MAX6724UTSYD3 is sourced from the original manufacturer or authorized distributors?
All MAX6724UTSYD3 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 MAX6724UTSYD3 meets industry standards.
7.What is the process for return or replacement of MAX6724UTSYD3?
All MAX6724UTSYD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTSYD3, 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 MAX6724UTSYD3 part is unused and in its original packaging.
Return procedure for MAX6724UTSYD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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