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Analog Devices Inc./Maxim Integrated MAX6720AUTTGD3+T
- Part No.:
- MAX6720AUTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720AUTTGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,694
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Product details
Overview
MAX6720AUTTGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (auxiliary) with factory-trimmed thresholds of 4.625V (VTH1), 3.075V (VTH2), and 626.5mV reference for RSTIN. It asserts an active-low push-pull reset output for ≥210ms after any monitored supply falls below threshold and guarantees valid reset logic down to VCC1 or VCC2 = 0.8V. Used in multivoltage telecom power systems requiring reliable brownout detection and manual reset capability.
For engineers reviewing the MAX6720AUTTGD3+T datasheet, MAX6720AUTTGD3+T pinout, MAX6720AUTTGD3+T application, or MAX6720AUTTGD3+T equivalent, this page delivers verified specifications including dual-supply monitoring range (1.58–4.63V / 0.79–3.08V), 210ms reset timeout, 14µA typical supply current at 3.6V, watchdog support (35s startup / 1.12s normal), and RSTIN-adjustable third-voltage monitoring down to 0.62V.
Technical Context
The MAX6720AUTTGD3+T implements a dual-threshold comparator architecture with independent VCC1 and VCC2 sensing paths, plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. Its reset timeout timer is factory-set to 210ms (min), nonadjustable, and restarts if any monitored voltage dips below threshold before timeout completion.
This variant includes push-pull RST output (referenced to VCC1), manual reset input (MR) with 50kΩ internal pullup to VCC1, and no watchdog or power-fail functionality - confirmed by Selector Guide entry: "MAX6720 → 3 monitors, push-pull reset, manual reset only". It operates across –40°C to +85°C and draws ≤39µA total supply current over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% tolerance; ensures reliable reset assertion when primary 5V/3.3V rail drops below safe operating level |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% tolerance; monitors secondary supply such as 3.3V I/O or 2.5V core rails |
| RSTIN Reference Voltage | 626.5mV (typ); enables precise external resistor-divider setup for third-voltage monitoring down to 0.62V |
| Reset Timeout Period | 210ms (min); guarantees minimum system hold time during power recovery before release |
| Supply Current | 14µA (typ) at 3.6V; ultra-low quiescent draw supports battery-backed or energy-sensitive applications |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade embedded systems without derating |
| Reset Output Type | Active-low push-pull; drives directly to VCC1 without external pullup, simplifying PCB layout |
Pinout & Package
MAX6720AUTTGD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin functions are validated per Maxim's official Pin Description table for MAX6719/MAX6720 variants.
| Pin/Terminal | 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; must be connected to system common ground plane |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; pulse <1µs sufficient to trigger full reset cycle |
| 4 | VCC2 | Secondary supply input (0.9–3.3V range); powers internal VCC2 comparator and sets VTH2 threshold |
| 5 | RSTIN | Adjustable undervoltage monitor input; high-impedance node referenced to 626.5mV internal reference |
| 6 | VCC1 | Primary supply input (1.8–5.0V range); powers device core, sets VTH1 threshold, and references RST output |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1, VCC2, and RSTIN with independent thresholds - eliminates need for three discrete supervisors |
| Guaranteed reset validity | Outputs remain logically valid even when VCC1 or VCC2 drops to 0.8V, enabling robust brownout response in weak-rail conditions |
| Push-pull RST output | Drives high/low actively without external pullup; reduces BOM count and improves noise immunity vs. open-drain alternatives |
| Low supply current | 14µA typical at 3.6V enables use in always-on subsystems (e.g., RTC backup, wake-on-event circuits) |
| Factory-trimmed precision | VTH1 = 4.625V and VTH2 = 3.075V specified with ±1.5% tolerance - eliminates external calibration components |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 48V-to-5V DC/DC output and isolated 3.3V I/O rail in carrier-grade access equipment. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail collapses during hot-swap or load transient. Use Value: Prevents firmware corruption during partial power loss; 210ms timeout ensures stable reinitialization after line recovery. |
Use Scenario: Supervising 24V field power and 5V logic supply in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Triple-monitoring solution using RSTIN to track auxiliary 12V sensor bias rail alongside main supplies. Use Value: Enables single-chip detection of multi-rail faults - reducing board area vs. discrete solutions by >40%. |
| Medical Diagnostic Imaging | Network Edge Router |
|
Use Scenario: Ensuring clean power-up of FPGA-based image processing subsystems powered by 1.2V core, 1.8V memory, and 3.3V interface rails. IC Role / Device Role / Timing Role: Resets FPGA configuration logic until all three critical rails stabilize above their respective thresholds. Use Value: Eliminates boot failures caused by marginal rail sequencing; RSTIN divider allows precise 1.2V core monitoring. |
Use Scenario: Managing power integrity across CPU, PHY, and PoE controller rails in compact 1U edge routers. IC Role / Device Role / Timing Role: Provides MR-triggered reset for field firmware updates and detects brownout on 12V PoE input via RSTIN. Use Value: Manual reset pin enables safe in-field recovery without chassis access; 0.8V reset validity supports degraded PoE operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTTGD5+T | Same package and pinout; reset timeout extended to 420ms (min) instead of 210ms | Better suited for systems with slower power supply settling or longer FPGA configuration times | Select when extended reset hold time is required without changing layout or firmware |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); fixed 3.3V VDD threshold, 200ms timeout, 2.5µA IQ | Lacks third-voltage monitoring capability; optimized for ultra-low-power battery systems | Choose only if RSTIN functionality is unnecessary and supply current <3µA is mandatory |
Compared with MAX6720AUTTGD3+T, the MAX6720AUTTGD5+T offers longer reset assertion for demanding power-up sequences, while the TPS3808G33DBVR trades RSTIN flexibility for sub-3µA quiescent current - making it viable only when third-rail monitoring is omitted and power budget is extremely constrained.
Availability
MAX6720AUTTGD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, medical diagnostic imaging subsystems, and network edge router designs requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6720AUTTGD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for space-constrained multivoltage systems needing reliable, low-quiescent-current supervision of two or three independent rails - targeting applications where discrete solutions increase cost and failure risk.
FAQ
What is the exact reset timeout period of the MAX6720AUTTGD3+T?
The MAX6720AUTTGD3+T has a factory-programmed reset timeout period of 210ms (minimum), as indicated by the 'D3' suffix in its part number. This value is guaranteed over the full –40°C to +85°C operating temperature range and does not require external components. The MAX6720AUTTGD3+T timeout cannot be adjusted via pins or resistors - it is fixed at manufacture.
Does the MAX6720AUTTGD3+T support watchdog timer functionality?
No, the MAX6720AUTTGD3+T does not include watchdog timer functionality. According to Maxim's official Selector Guide, MAX6720 is explicitly listed with "√" under Manual Reset and "-" under Watchdog Input. The MAX6720AUTTGD3+T variant provides only triple-voltage monitoring (VCC1, VCC2, RSTIN), push-pull RST output, and MR input - no WDI pin or watchdog logic is present.
Can the MAX6720AUTTGD3+T monitor a 1.2V supply using the RSTIN pin?
Yes, the MAX6720AUTTGD3+T can monitor a 1.2V supply via RSTIN using an external resistor divider. With its internal 626.5mV reference, a standard divider (e.g., R1 = 110kΩ, R2 = 120kΩ) scales 1.2V down to ~626mV at RSTIN. The MAX6720AUTTGD3+T's RSTIN input draws only ±25nA, ensuring minimal loading and accurate threshold detection for the 1.2V rail.
What is the supply voltage range supported by the MAX6720AUTTGD3+T for VCC1 and VCC2?
The MAX6720AUTTGD3+T supports VCC1 from 1.8V to 5.0V and VCC2 from 0.9V to 3.3V. It guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V - enabling operation during deep brownout conditions. These ranges are validated in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
Is the MAX6720AUTTGD3+T pin-compatible with other MAX67xx SOT23-6 variants?
Yes, the MAX6720AUTTGD3+T shares identical SOT23-6 pinout with all MAX6715–MAX6722 SOT23-6 devices (e.g., MAX6716, MAX6722), including RST, GND, MR, VCC2, RSTIN, and VCC1 assignments. However, functional compatibility depends on feature set: MAX6720AUTTGD3+T lacks watchdog and power-fail pins present in MAX6721/MAX6722, so those features must be unused in the design.
MAX6720AUTTGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 3.075V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6720AUTTGD3+T FAQ
1.How can I place an order for MAX6720AUTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720AUTTGD3+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 MAX6720AUTTGD3+T reliable?
The price and inventory of MAX6720AUTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720AUTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720AUTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720AUTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720AUTTGD3+T?
MAX6720AUTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720AUTTGD3+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 MAX6720AUTTGD3+T?
For technical support, including MAX6720AUTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720AUTTGD3+T requirements.
6.How does Aetrix verify that MAX6720AUTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720AUTTGD3+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 MAX6720AUTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720AUTTGD3+T?
All MAX6720AUTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720AUTTGD3+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 MAX6720AUTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6720AUTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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