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Analog Devices Inc./Maxim Integrated MAX6720UTRVD3
- Part No.:
- MAX6720UTRVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTRVD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,604
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Product details
Overview
MAX6720UTRVD3 from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference). It asserts active-low push-pull reset for ≥210ms after any supply drop, supports manual reset and watchdog timer, and operates from -40°C to +85°C - used in telecom power sequencing and battery-backed embedded systems.
For engineers reviewing the MAX6720UTRVD3 datasheet, MAX6720UTRVD3 pinout, MAX6720UTRVD3 application, or MAX6720UTRVD3 equivalent, key selection criteria include its dual-supply monitoring with factory-trimmed thresholds, 210ms reset timeout, push-pull RST output referenced to VCC1, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V.
Technical Context
The MAX6720UTRVD3 integrates three independent voltage monitors: primary (VCC1) with 4.625V ±125mV threshold, secondary (VCC2) with 3.075V ±75mV threshold, and auxiliary RSTIN with 626.5mV internal reference. Reset assertion is synchronized across all monitored inputs and maintained for a minimum 210ms timeout period after recovery.
It features a push-pull RST output referenced to VCC1, manual reset (MR) with 50kΩ internal pullup, and no watchdog or power-fail functionality - confirmed by Selector Guide and Ordering Information. All logic thresholds scale with VCC1 (VIH = 0.7×VCC1, VIL = 0.3×VCC1), and supply current is 14µA typical at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±125mV) - sets brownout detection point for primary supply, e.g., 5V rail |
| VCC2 Threshold | 3.075V (±75mV) - monitors secondary supply such as 3.3V I/O rail |
| RSTIN Reference | 626.5mV - enables external resistor-divider to monitor third supply down to 0.62V |
| Reset Timeout | 210ms (min) - ensures µP reset pulse meets boot initialization timing requirements |
| Supply Current | 14µA (typ) at 3.6V - enables long battery life in portable equipment |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom environments |
| Reset Output | Active-low push-pull, VCC1-referenced - drives directly without external pullup |
Pinout & Package
MAX6720UTRVD3 is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2/RSTIN drop below thresholds or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators and output drivers |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; forces reset on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input powering VCC2 monitor and RST2 logic (not present in MAX6720); also supplies internal reference for VCC2 comparator |
| 5 | VCC1 | Primary supply input powering device core, VCC1 monitor, and RST output driver; defines VIH/VIL levels |
| 6 | RSTIN | High-impedance adjustable reset input; compared against 626.5mV reference to monitor third supply via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VCC1 = 4.625V and VCC2 = 3.075V - eliminates external resistor networks for standard rails |
| Externally adjustable third-voltage monitor | RSTIN with 626.5mV reference - supports monitoring of sub-1V cores or battery voltages with <25nA input leakage |
| Push-pull RST output | No external pullup required - simplifies PCB layout and reduces BOM count vs. open-drain alternatives |
| Guaranteed reset validity down to 0.8V | Operates correctly even during deep brownout - ensures reliable reset assertion before µP loses functional state |
| Low 14µA supply current | Enables use in always-on battery backup circuits without significant drain |
Applications
| Telecom Power Sequencing | Battery-Backed Embedded Controller |
|---|---|
Use Scenario: Sequencing startup of FPGA, DSP, and memory rails in base station line cards where VCC1 = 5V, VCC2 = 3.3V, and RSTIN monitors 1.2V core. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting unified reset until all rails stabilize above thresholds and hold for 210ms. Use Value: Prevents race conditions between power domains and eliminates need for discrete RC timers or multiple supervisors. | Use Scenario: Monitoring main 3.3V system rail and backup coin-cell 3.0V supply in smart meter MCU, with RSTIN tied to battery voltage via divider. IC Role / Device Role / Timing Role: Dual-rail supervisor with failover detection - triggers reset if main supply drops or battery falls below 2.7V. Use Value: Enables graceful shutdown and nonvolatile register save before power loss, using only one IC instead of separate supervisors. |
| Industrial PLC I/O Module | Portable Medical Sensor Hub |
Use Scenario: Supervising isolated 24V-to-5V DC/DC output (VCC1) and 3.3V logic rail (VCC2) in DIN-rail mounted controller, with RSTIN monitoring isolated analog supply. IC Role / Device Role / Timing Role: Fault-tolerant triple-monitor ensuring µP reset during input transients, overvoltage, or isolated supply failure. Use Value: Meets IEC 61000-4-4 immunity requirements via 20µs VCC-to-RST delay and glitch rejection >100ns. | Use Scenario: Managing power-up sequence of BLE SoC (VCC1 = 3.3V), sensor interface ASIC (VCC2 = 1.8V), and Li-ion battery monitor (RSTIN = 3.2V via divider) in handheld diagnostic device. IC Role / Device Role / Timing Role: Single-chip solution for multivoltage domain supervision with minimal footprint in space-constrained design. Use Value: Reduces board area by 40% vs. discrete supervisor + voltage detector combo while maintaining 210ms reset hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTRVD2-T | Same package and pinout; 140ms reset timeout (vs. 210ms) | Suitable where shorter reset pulse suffices, e.g., fast-boot MCUs with <150ms initialization | Select when tighter timing margin allows reduced timeout without compromising reliability |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN, 200ms timeout, SOT23-6 | Lacks dual/third-supply monitoring; requires external resistors for threshold adjustment | Use only for single-rail systems where cost is prioritized over multivoltage flexibility |
Compared with MAX6720UTRVD3, the MAX6720UTRVD2-T offers identical monitoring capability but shorter reset hold time, while TPS3808G33DBVR sacrifices triple-supply support for lower unit cost in single-rail designs - neither is pin-compatible nor functionally interchangeable without schematic revision.
Availability
MAX6720UTRVD3 is available at Aetrix Electronics and suitable for telecom power sequencing, battery-backed embedded controllers, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6720UTRVD3 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-power supervisory solutions optimized for multivoltage embedded systems where space, power, and reliability are critical - especially in battery-operated and thermally harsh environments.
FAQ
What is the exact reset timeout period for MAX6720UTRVD3?
The MAX6720UTRVD3 has a guaranteed minimum reset timeout period of 210ms after all monitored supplies recover above their thresholds. This value is fixed by the "D3" suffix in the part number and is characterized over -40°C to +85°C. The actual timeout may extend up to 280ms at temperature extremes, per Electrical Characteristics table. MAX6720UTRVD3 uses an internal oscillator-based timer unaffected by supply voltage variation.
Does MAX6720UTRVD3 support watchdog functionality?
No, MAX6720UTRVD3 does not include watchdog functionality. Per the Selector Guide and Functional Diagram, only MAX6721–MAX6729 variants incorporate WDI input; MAX6720UTRVD3 is explicitly listed without watchdog support. Its supervision is limited to voltage monitoring (VCC1, VCC2, RSTIN), manual reset (MR), and push-pull RST output. MAX6720UTRVD3 must be paired with external watchdog logic if system-level processor activity monitoring is required.
What are the valid voltage ranges for VCC1 and VCC2 on MAX6720UTRVD3?
MAX6720UTRVD3 accepts VCC1 from 0.8V to 5.5V and VCC2 from 0.8V to 5.5V, though its factory-trimmed thresholds assume VCC1 ≥ 1.8V and VCC2 ≥ 0.9V for specification compliance. Operation is guaranteed down to 0.8V on either supply, with reset output remaining valid. The device draws ICC1 ≤ 39µA and ICC2 ≤ 11µA maximum under full operating conditions. MAX6720UTRVD3 remains functional even if one supply drops to 0.8V while the other stays above 1.0V.
Can MAX6720UTRVD3 monitor a negative supply voltage?
MAX6720UTRVD3 cannot directly monitor negative supplies on VCC1 or VCC2, as both inputs require positive voltage relative to GND. However, its RSTIN pin can monitor a negative rail indirectly using a level-shifting resistor network referenced to GND - as shown in Figure 3b of the datasheet - where PFI (not present on MAX6720UTRVD3) would normally be used. Since MAX6720UTRVD3 lacks PFI/PFO, RSTIN remains the sole auxiliary input, and its 626.5mV reference is fixed versus GND. MAX6720UTRVD3 is therefore unsuitable for direct negative-voltage supervision without external op-amp conditioning.
Is MAX6720UTRVD3 pin-compatible with other MAX67xx devices in SOT23-6?
MAX6720UTRVD3 is pin-compatible with other 6-pin SOT23-6 variants in the MAX6715–MAX6729 family that share the same pin configuration: RST (pin 1), GND (pin 2), MR (pin 3), VCC2 (pin 4), VCC1 (pin 5), RSTIN (pin 6). This includes MAX6719, MAX6721–MAX6724. However, functional differences exist - e.g., MAX6721 adds WDI, MAX6719 has open-drain RST - so swapping requires verification of feature alignment. MAX6720UTRVD3's push-pull RST and absence of WDI/PFI make it electrically safe to substitute only for functionally identical variants.
MAX6720UTRVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- 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-23-6
MAX6720UTRVD3 FAQ
1.How can I place an order for MAX6720UTRVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTRVD3 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 reliable?
The price and inventory of MAX6720UTRVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTRVD3 is usually 5 days.
3.What payment methods are accepted for MAX6720UTRVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTRVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTRVD3?
MAX6720UTRVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTRVD3 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?
For technical support, including MAX6720UTRVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTRVD3 requirements.
6.How does Aetrix verify that MAX6720UTRVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6720UTRVD3 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 meets industry standards.
7.What is the process for return or replacement of MAX6720UTRVD3?
All MAX6720UTRVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTRVD3, 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 part is unused and in its original packaging.
Return procedure for MAX6720UTRVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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