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Analog Devices Inc./Maxim Integrated MAX6720UTRVD3+T
- Part No.:
- MAX6720UTRVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTRVD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,187
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Product details
Overview
MAX6720UTRVD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory IC monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (auxiliary) supply rails. It asserts an active-low push-pull reset output when any monitored voltage falls below its factory-trimmed threshold, maintains reset for 210ms (min), and guarantees valid reset operation down to VCC1 or VCC2 = 0.8V. Used in multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6720UTRVD3+T datasheet, MAX6720UTRVD3+T pinout, MAX6720UTRVD3+T application, or MAX6720UTRVD3+T equivalent, key selection criteria include dual-supply monitoring with adjustable third-rail support, 210ms reset timeout, push-pull RST output referenced to VCC1, and guaranteed operation at ultra-low supply voltages (≥0.8V).
Technical Context
The MAX6720UTRVD3+T implements independent voltage comparators for VCC1 (1.8V–5.0V range), VCC2 (0.9V–3.3V), and RSTIN (threshold = 626.5mV ±15.5mV). Its internal reset timeout timer is factory-set to 210ms (min), with hysteresis of 0.5% on reset thresholds and immunity to VCC transients ≤20µs at 100mV overdrive.
This device integrates a manual reset input (MR) with 50kΩ internal pullup to VCC1, supports watchdog-free operation, and features push-pull RST output logic referenced to VCC1 - eliminating need for external pullup while ensuring clean drive into µP reset pins across full operating temperature (-40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion during 5V rail brownout |
| VCC2 Reset Threshold | 3.075V (typ), factory-trimmed - matches common 3.3V I/O supply tolerance band |
| RSTIN Threshold | 626.5mV (typ), internal reference - enables precise monitoring of auxiliary rails ≥0.62V via resistor divider |
| Reset Timeout Period | 210ms (min) - meets JEDEC JESD8-12A hold-time requirements for most 32-bit µPs |
| Supply Current | 14µA (typ) at 3.6V - enables battery-backed operation >10 years in low-power IoT nodes |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded control and telecom equipment |
| Reset Output Type | Push-pull active-low - drives µP reset pin directly without external pullup; VOH = 0.8×VCC1 |
Pinout & Package
MAX6720UTRVD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks 3.2mA at VCC1 ≥4.5V; no external pullup required |
| 2 | GND | Analog/digital ground reference for all comparators and internal logic; must be low-impedance connection |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width; immune to <100ns glitches |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers core logic, VCC1 comparator, and references RST output |
| 6 | RSTIN | High-impedance auxiliary monitor input (626.5mV threshold); used with external resistor divider to set third-rail trip point |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Monitors VCC1, VCC2, and RSTIN simultaneously - eliminates need for discrete comparators in multirail SoC power domains |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset assertion even during deep brownout - critical for fail-safe shutdown in industrial PLCs |
| Push-pull RST output | Drives µP reset pin directly without external components - reduces BOM count and PCB area vs. open-drain alternatives |
| Low 14µA supply current | Enables always-on supervision in energy-harvesting and coin-cell-powered devices without compromising battery life |
| Factory-trimmed thresholds | VCC1 = 4.625V, VCC2 = 3.075V - eliminates calibration overhead and improves production yield in high-volume assembly |
Applications
| Industrial PLC Power Sequencing | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V system rail, 3.3V I/O rail, and 1.2V FPGA core rail during cold start and brownout events. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting synchronized reset to ARM Cortex-M7 and FPGA configuration logic. Use Value: Prevents partial initialization by holding reset until all three rails stabilize above their respective thresholds for ≥210ms. |
Use Scenario: Ensuring reliable boot of DSP-based line interface cards powered by isolated DC/DC converters. IC Role / Device Role / Timing Role: Primary supervisor for main 3.3V and auxiliary 1.8V supplies, with MR tied to hot-swap controller fault signal. Use Value: Guarantees reset remains asserted during converter soft-start and transient recovery, avoiding DSP lockup. |
| Medical Diagnostic Imaging Module | Automotive ADAS Camera ECU |
Use Scenario: Supervising 5V analog front-end, 3.3V digital logic, and 1.8V image sensor interface in portable ultrasound units. IC Role / Device Role / Timing Role: Fault-detection supervisor triggering controlled shutdown upon undervoltage on any rail, with RSTIN monitoring battery backup voltage. Use Value: Enables safe data save and hardware reset before power collapse - meeting IEC 62304 Class C safety requirements. |
Use Scenario: Validating 5V camera module supply, 3.3V SerDes link, and 1.2V ISP core voltage in automotive vision ECUs. IC Role / Device Role / Timing Role: Triple-supply monitor interfaced to ASIL-B compliant MCU reset pin with push-pull drive strength. Use Value: Meets ISO 26262 timing constraints for reset assertion duration and voltage threshold accuracy under temperature stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single-supply (VDD only), monitors one rail; fixed 3.3V threshold; open-drain RST; no RSTIN input | Lacks triple-monitoring capability and auxiliary rail support - suitable only for single-rail systems | Select only if design uses only one monitored supply and requires TI's extended -40°C to +125°C grade |
| ADM6712S332ARJZ-RL7 | Dual-supply monitor (VCC/VDD), fixed 3.32V threshold, open-drain RST, no RSTIN or MR input | No manual reset or third-rail monitoring - cannot replace MAX6720UTRVD3+T in systems requiring MR or auxiliary rail supervision | Consider only for cost-sensitive dual-rail applications where push-pull drive and RSTIN are unnecessary |
Compared with TPS3808G33DBVR and ADM6712S332ARJZ-RL7, the MAX6720UTRVD3+T uniquely delivers triple-supply monitoring with push-pull RST, factory-trimmed dual thresholds, and RSTIN-based auxiliary rail support - making it irreplaceable in multivoltage SoC designs requiring guaranteed reset integrity down to 0.8V.
Availability
MAX6720UTRVD3+T is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging modules, and automotive ADAS ECUs requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX6720UTRVD3+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, communications, and computing applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems - enabling reliable power-up sequencing, brownout detection, and fail-safe reset generation in space-constrained SOT23 packages.
FAQ
What is the exact reset timeout period of the MAX6720UTRVD3+T?
The MAX6720UTRVD3+T has a factory-set minimum reset timeout period of 210ms, with typical value 210ms and maximum 280ms over temperature (-40°C to +85°C). This timing is guaranteed by design and applies after any reset trigger event - including VCC1/VCC2 undervoltage, RSTIN drop, or MR assertion - and is independent of supply voltage within specified operating range.
Does the MAX6720UTRVD3+T support watchdog functionality?
No, the MAX6720UTRVD3+T does not include a watchdog timer. Per the Selector Guide, only MAX6721–MAX6729 variants incorporate WDI; the MAX6720UTRVD3+T belongs to the MAX6719/MAX6720 subgroup which provides triple-voltage supervision and manual reset but omits watchdog circuitry. For watchdog capability, consider MAX6724UTRVD3+T instead.
How is the RSTIN pin used in the MAX6720UTRVD3+T?
The RSTIN pin on the MAX6720UTRVD3+T serves as a high-impedance input for monitoring a third supply voltage, with a fixed internal reference of 626.5mV. To supervise a rail like 1.2V or 1.8V, connect an external resistor divider between that rail and GND, feeding the midpoint to RSTIN. The trip point is calculated as VEXT_TH = 626.5mV × (R1 + R2)/R2, allowing flexible auxiliary rail monitoring without additional ICs.
What is the function of the MR pin on the MAX6720UTRVD3+T?
The MR (Manual Reset) pin on the MAX6720UTRVD3+T is an active-low input with a 50kΩ internal pullup to VCC1. Pulling MR low forces an immediate reset assertion for the full 210ms timeout period, regardless of supply voltage status. It accepts TTL/CMOS logic levels and requires no external components - ideal for front-panel reset buttons or system-level fault signals.
Is the MAX6720UTRVD3+T compatible with 1.8V-only systems?
Yes, the MAX6720UTRVD3+T operates reliably in 1.8V-only systems: VCC1 can be as low as 1.8V (within 1.8V–5.0V spec), VCC2 supports down to 0.9V, and the device guarantees valid reset output down to VCC1 or VCC2 = 0.8V. Its 14µA typical supply current and 0.8V operational floor make it suitable for low-voltage battery-powered applications where other supervisors fail.
MAX6720UTRVD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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
MAX6720UTRVD3+T FAQ
1.How can I place an order for MAX6720UTRVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTRVD3+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 MAX6720UTRVD3+T reliable?
The price and inventory of MAX6720UTRVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTRVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720UTRVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTRVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTRVD3+T?
MAX6720UTRVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTRVD3+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 MAX6720UTRVD3+T?
For technical support, including MAX6720UTRVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTRVD3+T requirements.
6.How does Aetrix verify that MAX6720UTRVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720UTRVD3+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 MAX6720UTRVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720UTRVD3+T?
All MAX6720UTRVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTRVD3+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 MAX6720UTRVD3+T part is unused and in its original packaging.
Return procedure for MAX6720UTRVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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