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Analog Devices Inc./Maxim Integrated MAX6724UTYHD3+
- Part No.:
- MAX6724UTYHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTYHD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,231
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Product details
Overview
MAX6724UTYHD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (1.8V–5.0V), VCC2 (0.9V–3.3V), and an externally adjustable third supply via RSTIN (threshold = 626.5 mV). It asserts active-low push-pull reset for ≥210 ms after any monitored supply drops below its factory-trimmed threshold or manual reset is triggered - used in telecom power management and multivoltage embedded systems.
For engineers reviewing the MAX6724UTYHD3+ datasheet, MAX6724UTYHD3+ pinout, MAX6724UTYHD3+ application, or MAX6724UTYHD3+ equivalent, key selection criteria include dual-supply monitoring with auxiliary voltage support, guaranteed reset validity down to VCC1/VCC2 = 0.8 V, 14 µA typical supply current at 3.6 V, and compatibility with noisy industrial power rails requiring glitch immunity.
Technical Context
The MAX6724UTYHD3+ implements independent dual-threshold comparators for VCC1 and VCC2, plus a dedicated high-impedance RSTIN input referenced to a 626.5 mV internal bandgap. Its reset timeout is fixed at 210 ms (min), and it features push-pull RST output referenced to VCC1 and open-drain PFO referenced to VCC1.
This device belongs to the MAX6715–MAX6729 family with BiCMOS process (1072 transistors), supports manual reset with 50 kΩ internal pullup to VCC1, and guarantees correct reset logic state when either VCC1 or VCC2 remains > 0.8 V - enabling reliable brownout detection in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625 V (typ), factory-trimmed; ensures precise primary supply monitoring for 5 V or 4.8 V rail integrity |
| VCC2 Reset Threshold | 3.075 V (typ), factory-trimmed; enables accurate secondary supply supervision for 3.3 V I/O domains |
| RSTIN Threshold | 626.5 mV (typ); allows external resistor-divider to monitor third supply as low as 0.62 V |
| Reset Timeout Period | 210 ms (min); provides sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14 µA (typ) at 3.6 V; minimizes quiescent load in always-on battery-powered subsystems |
| Operating Temperature | −40°C to +85°C; qualified for industrial-grade deployment in telecom and embedded equipment |
| Reset Output Type | Push-pull active-low RST; eliminates need for external pullup and ensures fast, rail-to-rail drive capability |
Pinout & Package
MAX6724UTYHD3+ uses a 6-pin SOT23-6 package (2.9 mm × 1.6 mm × 1.1 mm, 0.95 mm pitch), surface-mount, RoHS-compliant lead-free variant (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low during fault and holds for 210 ms post-recovery |
| 2 | GND | Ground reference for all internal comparators, watchdog, and output drivers |
| 3 | MR | Active-low manual reset input with 50 kΩ internal pullup to VCC1; initiates reset on logic-low pulse ≥1 µs |
| 4 | VCC2 | Secondary supply input (0.9 V–3.3 V); powers internal circuitry when > VCC1 and sets VCC2 threshold comparator reference |
| 5 | VCC1 | Primary supply input (1.8 V–5.0 V); powers device when > VCC2 and sets VCC1 threshold comparator reference |
| 6 | RSTIN/PFI | Shared pin: selectable as RSTIN (adjustable third-supply monitor) or PFI (power-fail input); high-impedance, 626.5 mV reference |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous supervision of VCC1, VCC2, and third supply via RSTIN - eliminates need for discrete comparators or additional supervisors |
| Guaranteed reset validity | Reset output remains logically valid even when VCC1 or VCC2 drops to 0.8 V - critical for detecting final-stage brownout before shutdown |
| Glitch-immune architecture | Immunity to short VCC transients (<20 µs at 100 mV overdrive); prevents spurious resets in electrically noisy environments |
| Low-power operation | 14 µA typical ICC at 3.6 V - extends battery life in portable equipment and enables always-on system health monitoring |
| Factory-trimmed thresholds | VCC1 = 4.625 V and VCC2 = 3.075 V (typ); ±1.5% accuracy over temperature avoids calibration overhead in production |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring 48 V DC-DC converter output (via resistor divider), 3.3 V I/O rail, and 1.2 V core rail in remote radio unit. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting synchronized reset across FPGA, DSP, and analog front-end upon any rail undervoltage. Use Value: Prevents partial configuration and metastability by ensuring all subsystems reset together with 210 ms hold time. |
Use Scenario: Supervising 24 V field bus supply, 5 V controller rail, and 3.3 V sensor interface in modular I/O chassis. IC Role / Device Role / Timing Role: Fault-detection node triggering hardware reset and PFO interrupt to MCU when 24 V drops below 22.5 V. Use Value: Enables deterministic fail-safe response without software intervention, meeting SIL-2 functional safety requirements. |
| Portable Medical Monitor | Set-Top Box Power Management |
|
Use Scenario: Battery-backed system monitoring Li-ion cell voltage (via RSTIN), 3.3 V main logic rail, and 1.8 V display driver rail. IC Role / Device Role / Timing Role: Low-current (14 µA) supervisor extending runtime while providing early low-battery warning via RSTIN threshold. Use Value: Delays graceful shutdown until battery reaches 3.2 V, preserving patient data integrity during power loss. |
Use Scenario: Ensuring clean boot sequence for SoC, DDR memory, and tuner ICs powered by separate 1.2 V, 1.8 V, and 3.3 V regulators. IC Role / Device Role / Timing Role: Dual-threshold supervisor verifying all rails are stable before releasing SoC reset, with MR pin for front-panel reset button. Use Value: Eliminates boot failures caused by out-of-spec rail sequencing or regulator startup delay mismatch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTYHD3+ | Same pinout and function but VCC1 = 4.625 V, VCC2 = 2.925 V (S-suffix); no RSTIN/PFI shared pin - dedicated RSTIN only | Lacks PFI capability; unsuitable where power-fail interrupt generation is required | Select MAX6720UTYHD3+ only if third-supply monitoring is needed without power-fail functionality |
| TPS3808G33DBVR | Dual-supply (VDD, VDD2), fixed 3.3 V threshold on VDD2; no RSTIN; 200 ms timeout; 1.6 µA IQ | Monitors only two supplies; no auxiliary voltage or PFI support; lower quiescent current but less flexible | Choose TPS3808G33DBVR for cost-sensitive dual-rail designs where third-supply monitoring is unnecessary |
Compared with MAX6720UTYHD3+, MAX6724UTYHD3+ adds PFI/PFO functionality on the RSTIN pin, enabling power-fail interrupt generation without extra components; versus TPS3808G33DBVR, it provides true triple-supply supervision and higher reset threshold accuracy at the cost of higher IQ.
Availability
MAX6724UTYHD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-lifecycle assurance, and guaranteed lead-free compliance.
Supply support for MAX6724UTYHD3+ 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 power, sensing, and interface applications, with focus on high-reliability industrial and communications markets.
The MAX6715–MAX6729 product line delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems requiring simultaneous monitoring of primary, secondary, and auxiliary supplies with minimal board space and power budget.
FAQ
What is the exact reset timeout period of the MAX6724UTYHD3+?
The MAX6724UTYHD3+ has a minimum reset timeout period of 210 ms, 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 Electrical Characteristics table.
Does the MAX6724UTYHD3+ support power-fail detection?
Yes, the MAX6724UTYHD3+ supports power-fail detection using the RSTIN/PFI pin configured as PFI. When used in this mode, it compares the applied voltage against a 626.5 mV internal reference and asserts the open-drain PFO output low. The PFO deasserts immediately upon recovery - without reset timeout - making it suitable for early-warning interrupts.
Can the MAX6724UTYHD3+ monitor a 1.2 V core supply?
Yes, the MAX6724UTYHD3+ can monitor a 1.2 V core supply using the RSTIN input. By connecting a resistor divider between the 1.2 V rail and ground, with the midpoint fed to RSTIN, the device triggers reset when the divided voltage falls below 626.5 mV - corresponding to ~1.2 V at the rail assuming appropriate resistor values.
Is the MAX6724UTYHD3+ pin-compatible with other MAX67xx devices?
No - the MAX6724UTYHD3+ is not universally pin-compatible across the MAX67xx family. While it shares the 6-pin SOT23-6 footprint with MAX6715–MAX6723, pin functions differ: MAX6724UTYHD3+ uses Pin 6 as RSTIN/PFI, whereas MAX6721/MAX6722 use Pin 6 as WDI. Always verify pin mapping per device datasheet before substitution.
What is the maximum supply voltage the MAX6724UTYHD3+ can tolerate on VCC1 and VCC2?
The MAX6724UTYHD3+ supports absolute maximum supply voltages of +6 V on both VCC1 and VCC2 pins. However, functional operation is specified only up to +5.5 V. Operating above 5.5 V risks violating recommended conditions and may impact long-term reliability or parametric performance - always limit VCC1 and VCC2 to ≤5.5 V in normal use.
MAX6724UTYHD3+ 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:
- 1.313V, 2.188V, 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-6
MAX6724UTYHD3+ FAQ
1.How can I place an order for MAX6724UTYHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTYHD3+ 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 MAX6724UTYHD3+ reliable?
The price and inventory of MAX6724UTYHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTYHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6724UTYHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTYHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTYHD3+?
MAX6724UTYHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTYHD3+ 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 MAX6724UTYHD3+?
For technical support, including MAX6724UTYHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTYHD3+ requirements.
6.How does Aetrix verify that MAX6724UTYHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6724UTYHD3+ 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 MAX6724UTYHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6724UTYHD3+?
All MAX6724UTYHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTYHD3+, 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 MAX6724UTYHD3+ part is unused and in its original packaging.
Return procedure for MAX6724UTYHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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