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Analog Devices Inc./Maxim Integrated MAX6720UTYHD3+T
- Part No.:
- MAX6720UTYHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTYHD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6720UTYHD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 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 in multivoltage embedded systems.
For engineers reviewing the MAX6720UTYHD3+T datasheet, MAX6720UTYHD3+T pinout, MAX6720UTYHD3+T application, or MAX6720UTYHD3+T equivalent, key selection criteria include 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 MAX6720UTYHD3+T implements independent voltage comparators for primary (VCC1) and secondary (VCC2) supplies plus a high-impedance RSTIN input with 626.5mV internal reference, enabling precise third-voltage monitoring via external resistor divider. Its reset logic combines OR-ed fault conditions - VCC1/VCC2 undervoltage, RSTIN undervoltage, or MR assertion - with a monolithic timeout counter.
It features a push-pull RST output referenced to VCC1, 14µA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and guaranteed operation with VCC1 or VCC2 ≥ 0.8V - critical for brownout detection in battery-backed or low-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - sets primary supply monitor trip point for 5V/3.3V system rails |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - enables reliable monitoring of 3.3V I/O or auxiliary supplies |
| RSTIN Reference | 626.5mV (±15.5mV) - allows external resistor-divider to monitor third supply down to 0.62V with <25nA input bias |
| Reset Timeout | 210ms (min) - ensures sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ at 3.6V) - enables long battery life in portable equipment without compromising supervision accuracy |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom environments with no derating required |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup and drives directly into µP reset pin |
Pinout & Package
SOT23-6 package (2.9mm × 1.6mm × 1.1mm), lead-free, RoHS-compliant, thermal pad optional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when any monitored supply falls below threshold or MR is pulled low |
| 2 | GND | System 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 (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if present |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, sets RST output reference, and enables reset validity down to 0.8V |
| 6 | RSTIN | High-impedance adjustable reset input; monitors third voltage via external divider; threshold = 626.5mV ±15.5mV |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitors | VCC1 = 4.625V ±125mV and VCC2 = 3.075V ±75mV - eliminates external resistor networks and calibration for standard rail supervision |
| Externally adjustable third-voltage monitor | RSTIN with 626.5mV reference and <25nA input current - supports precision monitoring of 0.62V–5.5V supplies using two resistors |
| Guaranteed reset validity at low VCC | Functional reset assertion with VCC1 or VCC2 ≥ 0.8V - ensures reliable brownout detection during power ramp-down |
| Push-pull RST output | Drives µP reset pin directly without external pullup; VOL ≤ 0.4V at 3.2mA sink - reduces BOM count and layout complexity |
| Immunity to short VCC transients | No false reset for negative-going glitches <20µs (at 100mV overdrive) - prevents spurious resets in noisy power environments |
Applications
| Industrial PLC Power Sequencing | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V main rail, 3.3V I/O rail, and 1.2V FPGA core rail in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronized reset across CPU, FPGA, and interface ICs during undervoltage events. Use Value: Prevents partial initialization and metastability by holding all devices in reset until all three rails stabilize above their respective thresholds. | Use Scenario: Ensuring clean boot and graceful shutdown in carrier-grade Ethernet line cards powered from redundant DC feeds. IC Role / Device Role / Timing Role: Supervising primary 3.3V management rail, secondary 1.8V PHY rail, and auxiliary 12V DC-DC enable signal via RSTIN divider. Use Value: Enables deterministic power-up sequencing and early power-fail warning via RSTIN monitoring, allowing firmware-controlled save-and-shutdown before brownout. |
| Medical Diagnostic Imaging Module | Automotive Infotainment Head Unit |
Use Scenario: Validating stable 5V analog sensor supply, 3.3V digital logic supply, and 1.1V ADC reference supply in portable ultrasound subsystems. IC Role / Device Role / Timing Role: Dual-supply monitor with RSTIN used for precision 1.1V reference supervision; reset timeout set to 210ms to accommodate slow analog settling. Use Value: Eliminates image artifacts caused by premature ADC sampling during power ramp-up, verified by guaranteed reset validity down to 0.8V. | Use Scenario: Supervising 5V infotainment SoC supply, 3.3V CAN transceiver supply, and 1.8V display driver supply in automotive head units with cold-cranking resilience. IC Role / Device Role / Timing Role: Triple-monitor IC with MR input tied to ignition switch; push-pull RST drives SoC reset while tolerating VCC1 dips to 0.8V during cranking. Use Value: Maintains functional reset assertion during engine start (battery sag to ~6V), preventing lockup or undefined behavior in safety-critical UI firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTYHD5+T | Same package and thresholds, but 420ms (min) reset timeout vs. 210ms | Better suited for systems requiring longer reset hold time for complex FPGA configuration or multi-stage bootloaders | Select when extended reset duration is needed; otherwise MAX6720UTYHD3+T provides optimal timing for standard µP initialization. |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no RSTIN or VCC2 input; 200ms timeout; SOT23-6 | Lacks triple-monitor capability and adjustable third-input; suitable only for single-rail systems | Choose only if monitoring only one supply; MAX6720UTYHD3+T is required for dual/third-voltage supervision. |
Compared with MAX6720UTYHD5+T and TPS3808G33DBVR, the MAX6720UTYHD3+T uniquely delivers factory-trimmed dual-threshold supervision plus RSTIN-based third-voltage monitoring in a single SOT23-6 package, with 210ms timeout optimized for general-purpose µP boot sequences without over-provisioning delay.
Availability
MAX6720UTYHD3+T is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging modules, and automotive infotainment systems requiring stable component supply, guaranteed reset timing, and triple-voltage supervision.
Supply support for MAX6720UTYHD3+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 ultra-low-voltage, multirail microprocessor supervisory circuits in miniature SOT23 packages, targeting space-constrained embedded systems requiring reliable power-on reset, brownout protection, and manual reset capability.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6720UTYHD3+T?
The MAX6720UTYHD3+T has a factory-trimmed VCC1 reset threshold of 4.625V, with a guaranteed tolerance of ±125mV (4.500V to 4.750V) across temperature and supply variations. This value is encoded in the 'YH' suffix per Maxim's Reset Voltage Threshold Suffix Guide and is measured under falling VCC1 conditions.
Does the MAX6720UTYHD3+T support monitoring a third supply voltage, and how is it implemented?
Yes, the MAX6720UTYHD3+T supports third-supply monitoring via its RSTIN pin, which uses an internal 626.5mV reference voltage. A resistor divider connected between the target supply and ground sets the trip point using the formula VEXT_TH = 626.5mV × ((R1 + R2)/R2). The MAX6720UTYHD3+T guarantees RSTIN input current < ±25nA, enabling high-impedance, low-power monitoring.
What is the reset timeout period for the MAX6720UTYHD3+T, and is it adjustable?
The MAX6720UTYHD3+T has a fixed minimum reset timeout period of 210ms, indicated by the 'D3' suffix in its part number. This timeout is internally generated and not user-adjustable; it begins when reset is asserted and ensures the reset signal remains active for at least 210ms after all monitored supplies exceed their thresholds.
Is the reset output of the MAX6720UTYHD3+T open-drain or push-pull, and what are its drive capabilities?
The MAX6720UTYHD3+T features a push-pull active-low reset output (RST) referenced to VCC1. It can sink up to 3.2mA while maintaining VOL ≤ 0.4V at VCC1 ≥ 4.5V, and source up to 800µA while maintaining VOH ≥ 0.8 × VCC1 - eliminating the need for an external pullup resistor and enabling direct connection to most µP reset inputs.
How does the MAX6720UTYHD3+T ensure valid reset operation during low-supply conditions?
The MAX6720UTYHD3+T guarantees correct reset output logic state even when VCC1 or VCC2 drops to 0.8V - significantly lower than typical supervisor ICs. This is achieved through proprietary biasing and comparator design, ensuring reliable brownout detection and preventing premature release of reset during power decay in battery-operated or automotive systems.
MAX6720UTYHD3+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:
- 1.313V, 2.188V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6720UTYHD3+T FAQ
1.How can I place an order for MAX6720UTYHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTYHD3+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 MAX6720UTYHD3+T reliable?
The price and inventory of MAX6720UTYHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTYHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720UTYHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTYHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTYHD3+T?
MAX6720UTYHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTYHD3+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 MAX6720UTYHD3+T?
For technical support, including MAX6720UTYHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTYHD3+T requirements.
6.How does Aetrix verify that MAX6720UTYHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720UTYHD3+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 MAX6720UTYHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720UTYHD3+T?
All MAX6720UTYHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTYHD3+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 MAX6720UTYHD3+T part is unused and in its original packaging.
Return procedure for MAX6720UTYHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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