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Analog Devices Inc./Maxim Integrated MAX6720AUTZGD3+T
- Part No.:
- MAX6720AUTZGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720AUTZGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,689
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Product details
Overview
MAX6720AUTZGD3+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) for auxiliary supply monitoring down to 0.62V. It asserts active-low push-pull reset output with 210ms minimum timeout, supports manual reset and watchdog timer, and operates from -40°C to +85°C - used in multivoltage telecom power systems requiring reliable brownout detection and orderly shutdown.
For engineers reviewing the MAX6720AUTZGD3+T datasheet, MAX6720AUTZGD3+T pinout, MAX6720AUTZGD3+T application, or MAX6720AUTZGD3+T equivalent, key selection criteria include confirmed dual-supply monitoring thresholds (VTH1 = 4.625V, VTH2 = 3.075V), RSTIN-adjustable third-voltage capability, push-pull reset output logic, 210ms reset timeout, and guaranteed reset validity down to VCC1/VCC2 = 0.8V.
Technical Context
The MAX6720AUTZGD3+T implements a dual-threshold voltage monitor for primary (VCC1) and secondary (VCC2) supplies plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset assertion logic combines independent voltage-fall detection across all three inputs with a fixed 210ms minimum timeout period after recovery.
It features a push-pull active-low RST output referenced to VCC1, integrated 50kΩ MR pullup, and no watchdog or power-fail functionality - distinguishing it from MAX6721–MAX6729 variants. The device guarantees valid reset state down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge; ensures reset during 5V rail brownout) |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge; monitors 3.3V I/O supply stability) |
| RSTIN Reference | 626.5mV (internal precision reference enables external resistor-divider for third-voltage monitoring) |
| Reset Timeout | 210ms min (guaranteed minimum duration prevents premature processor release after recovery) |
| Supply Current | 14µA typ at 3.6V (ultra-low quiescent current extends battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (industrial-grade thermal range for telecom and embedded applications) |
| Reset Output | Active-low push-pull (no external pullup required; drives directly into µP reset pin) |
Pinout & Package
SOT23-6 package (2.9mm × 1.6mm × 1.1mm), lead-free, RoHS-compliant, surface-mount.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserted when any monitored supply falls below threshold |
| 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 when pulled low |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal circuitry when > VCC1 and sets VTH2 threshold |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device when > VCC2 and sets VTH1 threshold |
| 6 | RSTIN | High-impedance adjustable reset input; triggers reset when voltage falls below 626.5mV reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VTH1 = 4.625V (VCC1), VTH2 = 3.075V (VCC2) - eliminates external resistor networks for standard rails |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise monitoring of auxiliary supplies (e.g., 1.2V core, 1.8V memory) via resistor divider |
| Push-pull active-low reset output | No external pullup required; drives µP reset pin directly with robust VOL ≤ 0.4V at 3.2mA sink |
| Guaranteed reset validity down to 0.8V | Ensures correct reset assertion even during deep brownout conditions on either VCC1 or VCC2 |
| Ultra-low supply current | 14µA typical at 3.6V - critical for battery-backed systems and always-on monitoring circuits |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring 5V main rail and 3.3V interface rail in a remote radio unit with backup battery. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail drops below spec, enabling safe firmware reload before corruption. Use Value: Prevents system lockup during AC/DC converter transients by holding reset for full 210ms after recovery. | Use Scenario: Ensuring deterministic startup of FPGA-configured I/O expansion cards in modular control cabinets. IC Role / Device Role / Timing Role: Supervises 3.3V configuration supply and 2.5V I/O supply while providing manual reset via front-panel switch. Use Value: Factory-trimmed thresholds eliminate calibration drift; push-pull output interfaces directly with FPGA reset pin without pullup. |
| Portable Medical Monitor | Set-Top Box Power Management |
Use Scenario: Battery-powered ECG device with 3.3V analog front-end and 1.8V digital core, requiring fail-safe boot. IC Role / Device Role / Timing Role: Monitors both rails plus RSTIN-connected 1.2V LDO output to detect early battery depletion. Use Value: 626.5mV RSTIN reference enables accurate 1.2V monitoring with <1% error using standard 1% resistors. | Use Scenario: Consumer STB with multiple DC-DC converters powering SoC, memory, and HDMI PHY. IC Role / Device Role / Timing Role: Validates 5V standby, 3.3V main, and 1.2V core supplies before releasing SoC reset and enabling boot ROM. Use Value: 210ms timeout ensures all regulators settle before processor execution begins, eliminating boot failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTZTD3+T | VTH1 = 4.625V, VTH2 = 3.075V, same package and timeout, but open-drain RST output | Requires external pullup resistor; suitable where level-shifting or wired-OR reset bus is needed | Select when interfacing with bidirectional µP reset pins or multi-source reset arbitration |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN), 3.3V fixed VDD threshold, 200ms timeout, SOT23-6 | Lacks third-voltage monitoring capability; optimized for single-rail 3.3V systems | Choose for cost-sensitive 3.3V-only applications where RSTIN functionality is unnecessary |
Compared with MAX6720AUTZGD3+T, the MAX6720AUTZTD3+T requires external pullup but enables reset bus sharing, while TPS3808G33DBVR reduces BOM count in 3.3V-only designs but sacrifices triple-monitoring flexibility and precision RSTIN adjustability.
Availability
MAX6720AUTZGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, portable medical devices, and set-top box power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for MAX6720AUTZGD3+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 supervisory circuits targeting space-constrained systems needing reliable power-up sequencing, brownout protection, and manual reset - especially where battery life and board area are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6720AUTZGD3+T?
The MAX6720AUTZGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (falling edge), as indicated by the 'Z' suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed over temperature (-40°C to +85°C) with ±1.5% tolerance and 20ppm/°C tempco.
Does the MAX6720AUTZGD3+T include a watchdog timer function?
No, the MAX6720AUTZGD3+T does not include a watchdog timer. Per Maxim's Selector Guide, only MAX6721–MAX6729 variants feature WDI input; the MAX6720AUTZGD3+T is a triple-supply supervisor with RSTIN but no watchdog or power-fail functionality.
What is the function of Pin 6 (RSTIN) on the MAX6720AUTZGD3+T?
Pin 6 (RSTIN) on the MAX6720AUTZGD3+T is a high-impedance input referenced to a 626.5mV internal bandgap voltage. When the voltage at RSTIN falls below this threshold, the device asserts its active-low RST output - enabling precise monitoring of a third supply (e.g., 1.2V core) using an external resistor divider.
Is the reset output of the MAX6720AUTZGD3+T push-pull or open-drain?
The MAX6720AUTZGD3+T features a push-pull active-low reset output (Pin 1, RST), referenced to VCC1. This eliminates the need for an external pullup resistor and allows direct connection to most microprocessor reset inputs, delivering VOL ≤ 0.4V at 3.2mA sink current.
What is the minimum reset timeout period specified for the MAX6720AUTZGD3+T?
The MAX6720AUTZGD3+T has a minimum reset timeout period of 210ms, as indicated by the 'D3' suffix in the part number per Maxim's Reset Timeout Period Suffix Guide. This guaranteed minimum ensures sufficient hold time for processors to complete power stabilization before release.
MAX6720AUTZGD3+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:
- 1.11V, 2.313V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6720AUTZGD3+T FAQ
1.How can I place an order for MAX6720AUTZGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720AUTZGD3+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 MAX6720AUTZGD3+T reliable?
The price and inventory of MAX6720AUTZGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720AUTZGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720AUTZGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720AUTZGD3+T transactions.
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4.How is shipping managed for MAX6720AUTZGD3+T?
MAX6720AUTZGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720AUTZGD3+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 MAX6720AUTZGD3+T?
For technical support, including MAX6720AUTZGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720AUTZGD3+T requirements.
6.How does Aetrix verify that MAX6720AUTZGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720AUTZGD3+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 MAX6720AUTZGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720AUTZGD3+T?
All MAX6720AUTZGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720AUTZGD3+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 MAX6720AUTZGD3+T part is unused and in its original packaging.
Return procedure for MAX6720AUTZGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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