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Analog Devices Inc./Maxim Integrated MAX6724UTSVD3+
- Part No.:
- MAX6724UTSVD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTSVD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,316
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Product details
Overview
MAX6724UTSVD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (auxiliary) supply rails with factory-trimmed thresholds of 3.075V (VTH1), 2.925V (VTH2), and 626.5mV reference for RSTIN. It asserts an active-low push-pull reset output for ≥210ms after any monitored voltage drops below threshold or manual reset is triggered, and supports watchdog timeout (1.12s min normal mode, 35s min startup). It is used in multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6724UTSVD3+ datasheet, MAX6724UTSVD3+ pinout, MAX6724UTSVD3+ application, or MAX6724UTSVD3+ equivalent, key selection criteria include its triple-supply monitoring capability, guaranteed reset validity down to VCC1/VCC2 = 0.8V, push-pull RST output referenced to VCC1, 14µA typical supply current at 3.6V, and compatibility with battery-operated and industrial equipment where low quiescent current and precise undervoltage detection are critical.
Technical Context
The MAX6724UTSVD3+ implements dual independent voltage comparators for VCC1 and VCC2, plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap, enabling third-rail monitoring via external resistor divider. Its reset logic combines OR-ed fault conditions (VCC1/VCC2/RSTIN undervoltage, MR assertion) with a monolithic timeout timer ensuring minimum 210ms reset pulse width.
This device belongs to the MAX6715–MAX6729 family with BiCMOS process (1072 transistors), featuring immunity to short VCC transients (<20µs at 100mV overdrive), 20ppm/°C reset threshold tempco, and guaranteed operation across –40°C to +85°C. It lacks PFI/PFO and WDI functions-confirmed by Selector Guide-making it a dedicated triple-monitoring supervisor without power-fail or watchdog capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V (typ), factory-trimmed for primary rail monitoring - ensures deterministic reset at defined system VDD level |
| VCC2 Threshold | 2.925V (typ), factory-trimmed for secondary rail - enables accurate tracking of I/O or auxiliary supply |
| RSTIN Reference | 626.5mV (typ), internal bandgap reference - allows externally adjustable third-rail threshold via resistor divider |
| Reset Timeout | 210ms (typ), D3 suffix - guarantees sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ) at 3.6V - minimizes standby power in battery-critical applications like portable medical devices |
| Operating Temp | –40°C to +85°C - qualified for industrial and telecom environments without derating |
| Reset Output Type | Active-low push-pull, referenced to VCC1 - eliminates need for external pullup and ensures clean logic-level drive |
Pinout & Package
MAX6724UTSVD3+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, lead-free (+T suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1 - drives µP reset pin directly without pullup resistor |
| 2 | GND | Analog/digital ground reference - must be connected to system ground plane for stable threshold accuracy |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1 - debounced switch-to-ground initiates system reset |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range) - powers internal VCC2 comparator and sets VTH2 = 2.925V |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range) - powers core logic, sets VTH1 = 3.075V, and references RST and MR |
| 6 | RSTIN | High-impedance adjustable monitor input - connects to resistor divider for third-rail undervoltage detection down to 0.62V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1, VCC2, and RSTIN enables full-system power integrity in SoC-based designs with core/I/O/aux rails |
| Factory-trimmed thresholds | VTH1 = 3.075V and VTH2 = 2.925V eliminate external resistor calibration - reduces BOM count and layout complexity |
| Push-pull RST output | Drives reset line actively high/low without external components - improves noise immunity vs. open-drain alternatives |
| Guaranteed reset validity | Operates correctly down to VCC1 or VCC2 = 0.8V - ensures robust reset assertion during deep brownout conditions |
| Low supply current | 14µA typical at 3.6V - extends battery life in always-on IoT sensors and portable instrumentation |
Applications
| Industrial PLC Controller | Medical Patient Monitor |
|---|---|
|
Use Scenario: Monitors 3.3V I/O rail, 2.5V analog front-end rail, and 1.8V FPGA core rail during cold start and transient load events. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting active-low reset until all rails stabilize above 2.925V/2.925V/0.626V thresholds for ≥210ms. Use Value: Prevents firmware execution on marginal supplies, eliminating corrupted ADC readings or communication lockups in safety-critical diagnostics. |
Use Scenario: Ensures reliable boot sequence in battery-powered ECG module with separate 3.0V sensor bias, 2.8V display driver, and 1.2V MCU core supplies. IC Role / Device Role / Timing Role: Supervises three independent rails using VCC1/VCC2/RSTIN inputs; generates clean push-pull reset pulse synchronized to power-good timing. Use Value: Guarantees valid reset state even during 0.8V brownout - critical for FDA-compliant fail-safe behavior in Class II medical devices. |
| Telecom Line Card | Automotive Infotainment Head Unit |
|
Use Scenario: Validates 3.3V management controller rail, 2.5V PHY interface rail, and 1.2V DSP core rail in multi-board telecom shelf with hot-swap capability. IC Role / Device Role / Timing Role: Provides deterministic reset coordination across heterogeneous voltage domains, with MR input enabling remote board-level reset via backplane signal. Use Value: Eliminates need for discrete comparators and RC timers - reduces footprint by >40% and improves thermal stability vs. discrete solutions. |
Use Scenario: Monitors 3.3V infotainment SoC I/O, 2.8V display backlight, and 1.1V GPU core in automotive-grade head unit operating from 5V DC-DC converter. IC Role / Device Role / Timing Role: Triple-rail supervisor with 210ms timeout ensures complete SoC initialization before video pipeline activation. Use Value: Push-pull RST output prevents floating reset states during ignition transients - meets ISO 7637-2 Pulse 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTSVD3+ | Same pinout, identical VTH1/VTH2 thresholds and D3 timeout, but open-drain RST output instead of push-pull | Requires external pullup resistor; unsuitable for direct-drive µP reset pins with weak internal pullups | Select MAX6720UTSVD3+ only when open-drain flexibility (e.g., wired-OR reset bus) is required |
| TPS3808G33DBVR | Dual-supply monitor (VDD1/VDD2 only), no RSTIN input; fixed 3.08V/3.08V thresholds; 200ms timeout; 1.6µA IQ | Lacks third-rail monitoring - cannot replace MAX6724UTSVD3+ in designs requiring auxiliary supply supervision | Choose TPS3808G33DBVR only for cost-sensitive dual-rail applications where RSTIN functionality is unused |
Compared with MAX6720UTSVD3+, the MAX6724UTSVD3+ provides direct-drive reset capability without external components; versus TPS3808G33DBVR, it adds essential third-rail supervision for complex multivoltage SoC platforms - making it irreplaceable where RSTIN functionality is architecturally mandated.
Availability
MAX6724UTSVD3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical patient monitors, telecom line cards, and automotive infotainment head units requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6724UTSVD3+ 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 product line delivers ultra-low-voltage, triple-supply supervisory circuits optimized for space-constrained, multirail embedded systems where deterministic reset timing and sub-1µA quiescent current are mandatory design requirements.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6724UTSVD3+?
The MAX6724UTSVD3+ has a factory-trimmed VCC1 reset threshold of 3.075V (typical), with tolerance of ±1.5% (2.925V to 3.150V) over temperature. This value is encoded in the "TS" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified across –40°C to +85°C operation. The MAX6724UTSVD3+ uses this threshold to assert reset when the primary supply falls below specification.
Does the MAX6724UTSVD3+ support watchdog timer functionality?
No, the MAX6724UTSVD3+ does not include a watchdog timer. Per Maxim's Selector Guide, only MAX6721–MAX6729 variants with "W" in the ordering code support WDI; MAX6724UTSVD3+ is explicitly listed without watchdog input. Its function is limited to triple-voltage supervision (VCC1, VCC2, RSTIN) and manual reset - confirming that watchdog capability is absent in this specific variant of the MAX6724UTSVD3+.
What is the reset timeout period of the MAX6724UTSVD3+ and how is it set?
The MAX6724UTSVD3+ has a nominal reset timeout period of 210ms, indicated by the "D3" suffix in its part number. This value is factory-programmed and guaranteed over temperature (140ms min, 280ms max). The timeout begins when any monitored voltage recovers above its threshold and ensures the reset signal remains asserted for the full duration - a critical timing parameter for reliable µP initialization in the MAX6724UTSVD3+.
Can the MAX6724UTSVD3+ monitor a 1.2V supply rail?
Yes, the MAX6724UTSVD3+ can monitor a 1.2V rail using its RSTIN pin with an external resistor divider. Since RSTIN compares against a 626.5mV internal reference, a 1.2V rail can be scaled to match this threshold using R1/R2 = (1.2V / 0.6265V) − 1 ≈ 0.915. For example, R1 = 91.5kΩ and R2 = 100kΩ yields VEXT_TH = 1.2V. This configuration is validated in Maxim's Figure 1 and applies directly to the MAX6724UTSVD3+.
Is the MAX6724UTSVD3+ pin-compatible with other MAX67xx devices in SOT23-6 package?
The MAX6724UTSVD3+ shares the same 6-pin SOT23-6 footprint and pinout (RST/GND/MR/VCC2/VCC1/RSTIN) with MAX6719–MAX6723 and MAX6725–MAX6727 variants, but functional compatibility depends on feature enablement. While physically interchangeable, substituting with MAX6721UTSVD3+ (which includes WDI) or MAX6728UTSVD3+ (which adds PFI/PFO) will leave unused pins floating or require redesign - so pinout compatibility does not imply functional equivalence for the MAX6724UTSVD3+.
MAX6724UTSVD3+ 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:
- 1.575V, 3.075V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6724UTSVD3+ FAQ
1.How can I place an order for MAX6724UTSVD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTSVD3+ 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 MAX6724UTSVD3+ reliable?
The price and inventory of MAX6724UTSVD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTSVD3+ is usually 5 days.
3.What payment methods are accepted for MAX6724UTSVD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTSVD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTSVD3+?
MAX6724UTSVD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTSVD3+ 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 MAX6724UTSVD3+?
For technical support, including MAX6724UTSVD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTSVD3+ requirements.
6.How does Aetrix verify that MAX6724UTSVD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6724UTSVD3+ 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 MAX6724UTSVD3+ meets industry standards.
7.What is the process for return or replacement of MAX6724UTSVD3+?
All MAX6724UTSVD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTSVD3+, 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 MAX6724UTSVD3+ part is unused and in its original packaging.
Return procedure for MAX6724UTSVD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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