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Analog Devices Inc./Maxim Integrated MAX6720AUTTID3+T
- Part No.:
- MAX6720AUTTID3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720AUTTID3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6720AUTTID3+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 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 MAX6720AUTTID3+T datasheet, MAX6720AUTTID3+T pinout, MAX6720AUTTID3+T application, or MAX6720AUTTID3+T equivalent, key selection factors include its dual-supply monitoring range (1.8–5.0V / 0.9–3.3V), 14µA typical supply current at 3.6V, guaranteed reset validity at ultra-low VCC (0.8V), push-pull RST output referenced to VCC1, and factory-trimmed dual-threshold architecture with external RSTIN flexibility.
Technical Context
The MAX6720AUTTID3+T implements a dual-threshold voltage monitor with independent VCC1 and VCC2 comparators, plus a high-impedance RSTIN input tied to a 626.5mV internal reference for third-supply monitoring via external resistor divider. Its reset timeout is fixed at 210ms (min), determined by the 'D3' suffix, and reset assertion persists until all monitored voltages exceed their thresholds and the timeout elapses.
This device integrates a manual reset input (MR) with 50kΩ internal pullup to VCC1 and supports noise-immune operation down to 0.8V on either supply rail. It lacks watchdog and power-fail features - confirmed by Selector Guide entry showing √ only under "Manual Reset" and "3 Voltage Monitors", with blank entries for WDI and PFI/PFO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; ensures reset assert when primary supply drops below this level) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; monitors secondary supply such as 3.3V I/O rail) |
| RSTIN Reference | 626.5mV (internal precision reference enabling third-supply monitoring down to 0.62V via resistor divider) |
| Reset Timeout | 210ms (minimum duration reset remains asserted after all supplies recover; critical for safe µP boot sequencing) |
| Supply Current | 14µA (typical at 3.6V; enables battery-backed or low-power embedded systems with minimal quiescent load) |
| Valid Reset Down To | VCC1 or VCC2 = 0.8V (guaranteed correct RST logic state even during deep brownout, supporting robust fail-safe behavior) |
| Output Type | Push-pull active-low RST (referenced to VCC1; eliminates need for external pullup and drives directly into µP reset pin) |
Pinout & Package
MAX6720AUTTID3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). The package supports reflow soldering per JEDEC J-STD-020 and operates from –40°C to +85°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low on VCC1/VCC2/RSTIN undervoltage or MR activation |
| 2 | GND | Ground reference for all internal comparators, reset timer, and output driver |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; forces reset when pulled low |
| 4 | VCC2 | Secondary supply input (0.9–3.3V range); powers internal circuitry when > VCC1 and sets VCC2 threshold comparator reference |
| 5 | VCC1 | Primary supply input (1.8–5.0V range); powers device when > VCC2 and sets VCC1 threshold comparator reference |
| 6 | RSTIN | High-impedance adjustable reset input; compared against 626.5mV internal reference to monitor third supply (e.g., 1.2V core) |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | VCC1 = 4.625V and VCC2 = 3.075V enable precise, drift-stable monitoring of 5V/3.3V rails without external components |
| Externally adjustable RSTIN | 626.5mV internal reference allows third-supply monitoring (e.g., 1.2V, 1.8V) using only two resistors - no trimming required |
| Guaranteed reset validity at 0.8V | Ensures deterministic reset behavior during severe brownout, eliminating race conditions in low-VCC system startup |
| Push-pull RST output | Drives µP reset pin directly without external pullup; compatible with bidirectional reset I/O when used with 4.7kΩ series resistor |
| Ultra-low 14µA supply current | Minimizes standby power in battery-powered or energy-sensitive applications such as portable networking gear |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring 48V-to-5V DC/DC converter output (VCC1) and isolated 3.3V I/O rail (VCC2) in remote radio units. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail falls below spec, ensuring clean µP restart before FPGA configuration. Use Value: Prevents partial initialization and latch-up by enforcing 210ms minimum reset hold time after both rails stabilize. |
Use Scenario: Supervising 24V field power (VCC1), 5V logic rail (VCC2), and 3.3V microcontroller core (RSTIN) in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Triple-voltage monitor with push-pull RST driving µC reset pin directly, eliminating external pullup and reducing BOM count. Use Value: 14µA quiescent current extends backup battery life; 0.8V reset validity ensures operation during transient dips on noisy industrial 24V lines. |
| Network Switch ASIC Power Management | Medical Diagnostic Handheld |
|
Use Scenario: Validating 1.2V ASIC core (RSTIN), 3.3V SerDes interface (VCC2), and 5V management MCU supply (VCC1) in Layer-3 switches. IC Role / Device Role / Timing Role: Precision threshold supervisor providing independent fault detection per rail with no shared reference dependency. Use Value: Factory-trimmed 4.625V/3.075V thresholds eliminate calibration overhead; RSTIN's 626.5mV reference enables accurate 1.2V core monitoring with <1% error. |
Use Scenario: Ensuring reliable boot of ARM Cortex-M4 in battery-operated ultrasound probe with 3.6V main rail (VCC1), 2.8V display driver (VCC2), and 1.8V sensor interface (RSTIN). IC Role / Device Role / Timing Role: Low-power triple-supply supervisor with manual reset button support (MR) for field service recovery. Use Value: 14µA ICC enables >1-year shelf life on coin cell; MR's internal 50kΩ pullup simplifies front-panel switch design with no external resistor needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual/triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6719AUTTID3+T | Same SOT23-6 package and D3 timeout, but open-drain RST output instead of push-pull; requires external pullup resistor | Suitable where µP reset pin is open-drain or bidirectional and external pullup is already present | Select MAX6719AUTTID3+T only if board layout includes pullup; otherwise MAX6720AUTTID3+T reduces component count and improves drive strength. |
| TPS3808G33DBVR | Single-supply (3.3V only) supervisor with 200ms timeout; no VCC2 or RSTIN inputs; 2.5µA supply current | Limited to single-rail monitoring; lacks triple-voltage capability and manual reset input | Choose TPS3808G33DBVR only for cost-sensitive 3.3V-only designs where auxiliary supply monitoring is unnecessary. |
Compared with MAX6719AUTTID3+T, MAX6720AUTTID3+T eliminates external pullup requirements and improves noise immunity on reset line; versus TPS3808G33DBVR, it adds full dual/third-supply supervision and MR functionality at modest current penalty - essential for multirail reliability-critical systems.
Availability
MAX6720AUTTID3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, and medical handheld diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6720AUTTID3+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 and mixed-signal ICs for power management, sensing, and interface applications, with emphasis on high-reliability industrial and communications systems.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained, multivoltage embedded systems where guaranteed reset validity at sub-1V supply levels is mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6720AUTTID3+T?
The MAX6720AUTTID3+T has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, as defined by the 'TT' suffix per Maxim's Reset Voltage Threshold Suffix Guide. These values are guaranteed over –40°C to +85°C and include ±1.5% tolerance, enabling precise monitoring of 5V and 3.3V rails without external calibration.
Does MAX6720AUTTID3+T include a watchdog timer or power-fail function?
No, MAX6720AUTTID3+T does not include watchdog timer (WDI) or power-fail input/output (PFI/PFO) functionality. Per Maxim's Selector Guide, it is designated for triple-voltage monitoring with manual reset only - confirmed by blank entries under WDI and PFI/PFO columns. Its feature set is strictly VCC1/VCC2/RSTIN monitoring + MR + push-pull RST.
What is the purpose of the RSTIN pin on MAX6720AUTTID3+T, and how is it used?
The RSTIN pin on MAX6720AUTTID3+T is a high-impedance input referenced to a 626.5mV internal voltage reference, enabling monitoring of a third supply (e.g., 1.2V core) via an external resistor divider. When the divided voltage falls below 626.5mV, RST asserts. This provides flexible, accurate auxiliary rail supervision without adding discrete comparators or trimming components.
How does the reset timeout period of MAX6720AUTTID3+T behave during supply recovery?
The MAX6720AUTTID3+T maintains reset assertion for a minimum of 210ms after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds. If any supply dips below threshold before timeout completion, the internal timer resets and restarts - ensuring robust hold-off during marginal or noisy power conditions.
Can MAX6720AUTTID3+T operate reliably when VCC1 drops below 1.0V?
Yes, MAX6720AUTTID3+T guarantees valid reset output logic down to VCC1 or VCC2 = 0.8V, per Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout events - a key differentiator for safety-critical and industrial applications where supply collapse must trigger controlled shutdown.
MAX6720AUTTID3+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:
- 1.388V, 3.075V, 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
MAX6720AUTTID3+T FAQ
1.How can I place an order for MAX6720AUTTID3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720AUTTID3+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 MAX6720AUTTID3+T reliable?
The price and inventory of MAX6720AUTTID3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720AUTTID3+T is usually 5 days.
3.What payment methods are accepted for MAX6720AUTTID3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720AUTTID3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720AUTTID3+T?
MAX6720AUTTID3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720AUTTID3+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 MAX6720AUTTID3+T?
For technical support, including MAX6720AUTTID3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720AUTTID3+T requirements.
6.How does Aetrix verify that MAX6720AUTTID3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720AUTTID3+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 MAX6720AUTTID3+T meets industry standards.
7.What is the process for return or replacement of MAX6720AUTTID3+T?
All MAX6720AUTTID3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720AUTTID3+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 MAX6720AUTTID3+T part is unused and in its original packaging.
Return procedure for MAX6720AUTTID3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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