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Analog Devices Inc./Maxim Integrated MAX6724UTRVD3+T
- Part No.:
- MAX6724UTRVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTRVD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6724UTRVD3+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 provides push-pull active-low reset output with 210ms minimum timeout, watchdog timer (1.12s normal / 35s startup), manual reset input, and operates from -40°C to +85°C in 6-pin SOT23. Used in multivoltage telecom and industrial systems requiring reliable power sequencing and brownout detection.
For engineers reviewing the MAX6724UTRVD3+T datasheet, MAX6724UTRVD3+T pinout, MAX6724UTRVD3+T application, or MAX6724UTRVD3+T equivalent, key selection criteria include its triple-supply monitoring capability, factory-trimmed dual thresholds (VTH1 = 3.075V, VTH2 = 2.925V), guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA supply current, and integrated watchdog with long startup period.
Technical Context
The MAX6724UTRVD3+T implements a dual-threshold voltage monitor for VCC1 and VCC2 plus a high-impedance RSTIN comparator referenced to a 626mV internal bandgap. Its reset logic asserts RST low when any monitored voltage falls below its threshold, and holds reset for a fixed 210ms minimum timeout after all voltages recover.
It integrates a dual-mode watchdog timer: 35s minimum initial timeout after power-up/manual reset, transitioning to 1.12s minimum normal timeout after first WDI edge detection. The push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V (typ), factory-trimmed for primary supply monitoring |
| VCC2 Threshold | 2.925V (typ), factory-trimmed for secondary supply monitoring |
| RSTIN Threshold | 626mV (typ), enables external resistor-divider for third-voltage monitoring down to 0.62V |
| Reset Timeout | 210ms (min), ensures sufficient processor hold time during supply recovery |
| Watchdog Period | 1.12s (min) normal mode; 35s (min) startup mode - prevents false resets during boot |
| Supply Current | 14µA (typ) at 3.6V - enables battery-backed operation in portable systems |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free (+T suffix), footprint compatible with industry-standard SOT23-6 land pattern.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on fault and holds for 210ms timeout |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; forces reset when pulled low |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal circuitry when above VCC1 and sets VTH2 threshold |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers device when above VCC2 and sets VTH1 threshold |
| 6 | RSTIN | High-impedance adjustable reset input; monitors third voltage via external divider; threshold = 626mV |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VTH1 = 3.075V, VTH2 = 2.925V - eliminates external resistor networks for primary/secondary supply monitoring |
| Externally adjustable RSTIN input | 626mV internal reference enables precise third-voltage monitoring (e.g., 1.2V core, 1.8V I/O) with minimal BOM impact |
| Dual-mode watchdog timer | 35s startup + 1.12s normal timeout - accommodates complex boot sequences while ensuring runtime fault detection |
| Guaranteed reset validity to 0.8V | Ensures correct reset assertion even during deep brownout conditions where VCC1 or VCC2 drops to 0.8V |
| Push-pull RST output | Drives directly into µP reset pin without external pullup; sinks 3.2mA at 4.5V for robust noise immunity |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring 3.3V backplane, 2.5V FPGA bank, and 1.2V CPU core in a modular telecom shelf. IC Role / Device Role / Timing Role: Triple-voltage supervisor enforcing strict power-up order and detecting simultaneous brownouts across domains. Use Value: Prevents configuration corruption by holding reset until all rails stabilize above their 3.075V/2.925V/0.626V thresholds and timing out 210ms. | Use Scenario: Embedded controller in programmable logic controller managing 24V field I/O, 5V logic, and 3.3V MCU supply. IC Role / Device Role / Timing Role: Fault detector asserting reset on undervoltage of any rail, with manual reset for field service and watchdog for software hang detection. Use Value: Enables fail-safe shutdown before corrupted I/O states propagate; 35s watchdog startup avoids false triggers during cold boot. |
| Portable Medical Monitor | Network Switch ASIC Power Management |
Use Scenario: Battery-powered ECG monitor with Li-ion (3.0–4.2V), 3.3V analog front-end, and 1.8V digital subsystem. IC Role / Device Role / Timing Role: Low-current (14µA) triple-supply monitor ensuring safe operation across battery discharge curve. Use Value: Extends battery life while guaranteeing reset remains valid down to 0.8V per rail - critical for last-minute data save before shutdown. | Use Scenario: High-density Ethernet switch using multi-rail DC/DC converters for ASIC core, I/O, and PHY supplies. IC Role / Device Role / Timing Role: Centralized supervision of 1.0V core, 1.8V I/O, and 3.3V management rail with RSTIN monitoring auxiliary bias supply. Use Value: Eliminates need for three discrete supervisors; single 6-pin SOT23 reduces PCB area and improves thermal coupling between monitored rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTRVD3+T | Open-drain RST output; same thresholds, timeout, and RSTIN functionality | Requires external pullup resistor; suited for bidirectional µP reset pins or wired-OR reset buses | Select when interfacing with processors requiring open-drain reset or shared reset lines |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); 3.3V fixed VDD threshold; 200ms timeout; 2.5µA quiescent current | Lacks third-voltage monitoring; lower supply current but no adjustable auxiliary input | Select when only two rails require monitoring and ultra-low power is prioritized over flexibility |
Compared with MAX6724UTRVD3+T, MAX6720UTRVD3+T offers identical supervision logic but requires external pullup, while TPS3808G33DBVR reduces cost and current draw at the expense of losing RSTIN-based third-rail monitoring capability.
Availability
MAX6724UTRVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control systems, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6724UTRVD3+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers compact, ultra-low-voltage supervisory circuits targeting multirail embedded systems where space, power, and reliability are critical constraints.
FAQ
What are the factory-trimmed reset thresholds for MAX6724UTRVD3+T?
The MAX6724UTRVD3+T has VCC1 reset threshold of 3.075V (typ) and VCC2 reset threshold of 2.925V (typ), both factory-trimmed and specified in the Reset Voltage Threshold Suffix Guide. These values are confirmed in the Electrical Characteristics table under VTH1 and VTH2 columns for the "S" and "S" suffix combination encoded in the part number.
Does MAX6724UTRVD3+T support watchdog functionality?
Yes, MAX6724UTRVD3+T includes a dual-mode watchdog timer with 35s minimum startup timeout after power-up or manual reset, and 1.12s minimum normal timeout after the first valid WDI transition. This is confirmed in the Selector Guide (MAX6724 includes WDI) and Electrical Characteristics table under tWD parameter.
What is the reset timeout period of MAX6724UTRVD3+T?
The MAX6724UTRVD3+T has a minimum reset timeout period of 210ms, indicated by the "D3" suffix in its part number per the Reset Timeout Period Suffix Guide. This value is guaranteed over temperature and ensures sufficient hold time for microprocessor initialization after supply recovery.
Can MAX6724UTRVD3+T monitor a third voltage supply?
Yes, MAX6724UTRVD3+T supports third-voltage monitoring via its RSTIN pin, which features a 626mV (typ) internal reference. An external resistor divider allows setting custom thresholds - for example, monitoring a 1.2V core rail by selecting R1/R2 to scale 1.2V down to 626mV at RSTIN.
What package type and pin count does MAX6724UTRVD3+T use?
MAX6724UTRVD3+T uses a 6-pin SOT23-6 package, as confirmed in the Ordering Information table and Pin Configurations section. The "+T" suffix denotes lead-free, RoHS-compliant packaging, and the device is rated for operation from -40°C to +85°C.
MAX6724UTRVD3+T 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, 2.625V, 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
MAX6724UTRVD3+T FAQ
1.How can I place an order for MAX6724UTRVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTRVD3+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 MAX6724UTRVD3+T reliable?
The price and inventory of MAX6724UTRVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTRVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6724UTRVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTRVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTRVD3+T?
MAX6724UTRVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTRVD3+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 MAX6724UTRVD3+T?
For technical support, including MAX6724UTRVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTRVD3+T requirements.
6.How does Aetrix verify that MAX6724UTRVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6724UTRVD3+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 MAX6724UTRVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6724UTRVD3+T?
All MAX6724UTRVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTRVD3+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 MAX6724UTRVD3+T part is unused and in its original packaging.
Return procedure for MAX6724UTRVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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