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Analog Devices Inc./Maxim Integrated MAX6720UTSYD3
- Part No.:
- MAX6720UTSYD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTSYD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
MAX6720UTSYD3 from Maxim Integrated is a triple-voltage microprocessor supervisory IC monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds, 210ms min reset timeout, push-pull active-low RST output, and manual reset input. It guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V - used in multivoltage embedded systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6720UTSYD3 datasheet, MAX6720UTSYD3 pinout, MAX6720UTSYD3 application, or MAX6720UTSYD3 equivalent, this page delivers verified circuit role, exact threshold values, confirmed SOT23-6 package mapping, validated pin functions, and two technically documented alternative parts for dual/triple-supply supervision in telecom, industrial, and portable equipment.
Technical Context
The MAX6720UTSYD3 implements dual independent voltage comparators for VCC1 and VCC2 plus a high-impedance adjustable comparator on RSTIN referenced to a 626.5mV internal bandgap. Reset assertion occurs when any monitored voltage falls below its threshold and persists for a guaranteed minimum 210ms after all voltages recover.
It features a push-pull RST output referenced to VCC1, an internal 50kΩ pullup on MR, and operates across –40°C to +85°C. The device is immune to VCC transients <20µs at 100mV overdrive and maintains correct reset logic state even as VCC1 or VCC2 decays to 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed - sets primary supply brownout detection point for 5V or 4.8V rails |
| VCC2 Threshold | 3.075V (typ), factory-trimmed - monitors secondary supply such as 3.3V I/O or core rail |
| RSTIN Threshold | 626.5mV (typ), internal reference - enables external resistor-divider to monitor third supply down to 0.62V |
| Reset Timeout | 210ms (min) - ensures µP remains held in reset long enough for full power stabilization |
| Supply Current | 14µA (typ) at 3.6V - enables use in battery-backed or ultra-low-power systems |
| Operating Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Reset Output Type | Push-pull, active-low RST - eliminates need for external pullup and drives directly into µP reset pin |
Pinout & Package
MAX6720UTSYD3 is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with gull-wing leads and thermal pad not connected internally.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on fault and holds for 210ms min after recovery |
| 2 | GND | Analog/digital ground reference for all internal comparators and output drivers |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; forces reset when pulled low |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, sets RST output reference, and feeds VCC1 comparator |
| 6 | RSTIN | Adjustable undervoltage monitor input; compares external divided voltage against 626.5mV reference to supervise third rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VCC1 = 4.625V, VCC2 = 3.075V - eliminates external resistor networks for standard 5V/3.3V system supervision |
| Externally adjustable third-supply monitor | RSTIN with 626.5mV reference - supports monitoring of 0.62V–5.5V rails via resistor divider without added ICs |
| Guaranteed reset validity to 0.8V supply | Functional reset assertion even as VCC1 or VCC2 drops to 0.8V - ensures fail-safe behavior during deep brownout |
| 210ms minimum reset timeout | Fixed D3-suffix delay - meets JEDEC JESD78 reliability requirements for processor initialization hold time |
| Push-pull RST output | No external pullup required - simplifies PCB layout and reduces BOM count vs. open-drain alternatives |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitoring 48V-to-5V DC/DC primary output and isolated 3.3V logic rail in remote radio head power management. IC Role / Device Role: Dual-rail supervisor asserting reset until both supplies stabilize post-power-up or fault recovery. Use Value: Prevents FPGA configuration corruption by holding reset for ≥210ms while DC/DC converters settle and LDOs ramp. |
Use Scenario: Supervising 24V field power input and 5V microcontroller core supply in DIN-rail mounted controller. IC Role / Device Role: Primary/secondary voltage monitor with MR input tied to front-panel reset button. Use Value: Enables field-serviceable hard reset without firmware intervention while maintaining immunity to 20µs VCC glitches. |
| Portable Medical Sensor Hub | Battery-Powered Set-Top Box |
|
Use Scenario: Validating Li-ion battery voltage (via RSTIN divider) alongside regulated 3.3V MCU rail and 1.8V sensor interface rail. IC Role / Device Role: Triple-supply supervisor using RSTIN to trigger graceful shutdown before battery reaches 3.0V cutoff. Use Value: 14µA quiescent current extends battery life; 0.8V VCC operation ensures last-resort reset assertion during deep discharge. |
Use Scenario: Coordinating power-up of SoC (VCC1), DDR memory (VCC2), and tuner module (RSTIN-monitored 12V rail) in hybrid broadcast receiver. IC Role / Device Role: Timing-coordinated triple-rail supervisor ensuring deterministic boot sequence across heterogeneous subsystems. Use Value: Factory-trimmed thresholds eliminate calibration; 210ms timeout aligns with SoC PLL lock and memory training windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual/triple-supply supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTSVD3-T | VCC1 threshold = 3.075V (vs. 4.625V); same package, timing, and RSTIN capability | Suitable for 3.3V-primary systems instead of 5V-primary; requires redesign of VCC1 rail assignment | Select when supervising 3.3V main rail with 2.5V or 1.8V secondary - preserves identical footprint and timing |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no RSTIN or VCC2 inputs; 200ms timeout; SOT23-6 | Lacks triple-monitoring capability; requires additional ICs to replicate MAX6720UTSYD3's dual/threshold flexibility | Choose only for cost-sensitive 3.3V-only applications where third-rail monitoring is unnecessary |
Compared with MAX6720UTSVD3-T, the MAX6720UTSYD3 provides higher VCC1 threshold for 5V-system compatibility; compared with TPS3808G33DBVR, it delivers integrated triple-supply supervision without external components or layout changes.
Availability
MAX6720UTSYD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed factory-trimmed voltage thresholds.
Supply support for MAX6720UTSYD3 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 industrial, automotive, communications, and computing markets.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained embedded systems needing guaranteed reset behavior across wide temperature and supply ranges.
FAQ
What is the exact VCC1 and VCC2 reset threshold voltage for MAX6720UTSYD3?
The MAX6720UTSYD3 has factory-trimmed thresholds: VCC1 = 4.625V (typical, ±1.5% tolerance) and VCC2 = 3.075V (typical, ±1.5% tolerance), per Maxim's Reset Voltage Threshold Suffix Guide. These values are laser-trimmed during production and do not require external resistors. The MAX6720UTSYD3 datasheet specifies these as guaranteed min/max limits across –40°C to +85°C.
Does MAX6720UTSYD3 support monitoring a third voltage, and how is it configured?
Yes, MAX6720UTSYD3 supports third-voltage monitoring via the RSTIN pin, which compares an external divided voltage against a precise 626.5mV internal reference. To configure, connect a resistor divider from the target supply to GND with RSTIN at the midpoint. The formula is VEXT_TH = 626.5mV × (R1 + R2)/R2. MAX6720UTSYD3's 25nA max RSTIN input current enables high-value resistors to minimize power draw.
What is the reset timeout period of MAX6720UTSYD3, and is it adjustable?
The MAX6720UTSYD3 has a fixed 210ms minimum reset timeout period, denoted by the "D3" suffix in its part number. This value is factory-programmed and not user-adjustable. The timeout begins when all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and ends 210ms later - ensuring sufficient hold time for processor initialization and peripheral stabilization.
Is MAX6720UTSYD3 compatible with 1.8V systems, and what is its minimum operating voltage?
Yes, MAX6720UTSYD3 operates with VCC1 as low as 1.8V and VCC2 as low as 0.9V. Critically, it guarantees valid reset output logic down to VCC1 or VCC2 = 0.8V - meaning the RST pin remains correctly asserted even during deep brownout conditions. This makes MAX6720UTSYD3 suitable for low-voltage battery-powered designs where supply collapse must trigger fail-safe reset.
What package type and pin count does MAX6720UTSYD3 use, and is it RoHS-compliant?
MAX6720UTSYD3 uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm body size) with gull-wing leads. It is RoHS-compliant and available in lead-free form (ordered with "+T" suffix). The pinout is fully documented in the Maxim datasheet: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1, Pin 6 = RSTIN.
MAX6720UTSYD3 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:
- 2.188V, 2.925V, 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
MAX6720UTSYD3 FAQ
1.How can I place an order for MAX6720UTSYD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTSYD3 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 MAX6720UTSYD3 reliable?
The price and inventory of MAX6720UTSYD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTSYD3 is usually 5 days.
3.What payment methods are accepted for MAX6720UTSYD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTSYD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTSYD3?
MAX6720UTSYD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTSYD3 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 MAX6720UTSYD3?
For technical support, including MAX6720UTSYD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTSYD3 requirements.
6.How does Aetrix verify that MAX6720UTSYD3 is sourced from the original manufacturer or authorized distributors?
All MAX6720UTSYD3 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 MAX6720UTSYD3 meets industry standards.
7.What is the process for return or replacement of MAX6720UTSYD3?
All MAX6720UTSYD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTSYD3, 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 MAX6720UTSYD3 part is unused and in its original packaging.
Return procedure for MAX6720UTSYD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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