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Analog Devices Inc./Maxim Integrated MAX6720UTTGD3+T
- Part No.:
- MAX6720UTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTTGD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6720UTTGD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary) and VCC2 (secondary) supplies with factory-trimmed thresholds of 3.075V (VTH1) and 3.075V (VTH2), 210ms minimum reset timeout, push-pull active-low RST output, and manual reset input. It ensures reliable system boot and brownout recovery in multivoltage embedded systems.
For engineers reviewing the MAX6720UTTGD3+T datasheet, MAX6720UTTGD3+T pinout, MAX6720UTTGD3+T application, or MAX6720UTTGD3+T equivalent, key selection criteria include dual-supply threshold matching, guaranteed reset validity down to VCC = 0.8V, low 14µA supply current at 3.6V, and compatibility with manual reset and push-pull reset interface requirements.
Technical Context
The MAX6720UTTGD3+T integrates two independent voltage comparators with ±1.5% threshold accuracy over -40°C to +85°C, each referenced to internal bandgap references. Its reset logic asserts RST low when either VCC1 or VCC2 falls below its respective threshold and holds for ≥210ms after both supplies recover.
This device uses a dedicated internal timer for reset timeout and features an internal 50kΩ pullup on MR, enabling direct connection to momentary switches without external components. It operates with no external capacitors required and maintains valid reset state even as VCC1 or VCC2 drops to 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V (typ), ±1.5% tolerance - sets primary supply brownout detection point for 3.3V systems |
| VCC2 Threshold | 3.075V (typ), ±1.5% tolerance - matches VCC1 for dual-rail monitoring or configurable secondary rail |
| Reset Timeout | 210ms (min) - ensures sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ) at 3.6V - enables battery-backed operation and low-power always-on supervision |
| Operating Temp | -40°C to +85°C - supports industrial and telecom equipment deployment without derating |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup and drives directly into µP reset pins |
| MR Input | Active-low with 50kΩ internal pullup to VCC1 - simplifies manual reset switch interface |
Pinout & Package
MAX6720UTTGD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+T suffix), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low during fault and holds for 210ms post-recovery |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; resets system when pulled low |
| 4 | VCC2 | Secondary supply input powering VCC2 comparator and enabling dual-supply monitoring |
| 5 | VCC1 | Primary supply input powering core logic, RST driver, and VCC1 comparator |
| 6 | NC | No connect - internally unused pin; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | Simultaneous VCC1 and VCC2 supervision with separate thresholds avoids single-point failure in multirail systems |
| Guaranteed reset validity to 0.8V | Ensures clean, deterministic reset assertion even during deep brownout conditions before full power collapse |
| Immunity to short VCC transients | Rejects <20µs negative glitches up to 100mV below threshold - prevents spurious resets in noisy environments |
| Low quiescent current | 14µA typical at 3.6V enables >10-year battery life in backup-supervised applications |
| Push-pull RST output | Drives µP reset pin directly without external pullup, reducing BOM count and PCB area vs. open-drain alternatives |
Applications
| Computers/Servers | Telecom/Networking Equipment |
|---|---|
Use Scenario: Monitoring 3.3V I/O and 3.3V core rails during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset until both rails stabilize above 3.075V. Use Value: Prevents CPU lockup by ensuring firmware execution only begins after both voltage domains meet specification. |
Use Scenario: Ensuring reliable boot sequence in line cards powered by redundant 3.3V DC-DC converters. IC Role / Device Role / Timing Role: Fault detector that triggers reset if either converter output dips below 3.075V for >210ms. Use Value: Eliminates need for discrete comparators and timers, reducing board space by 60% vs. discrete solution. |
| Industrial Equipment | Portable/Battery-Operated Equipment |
Use Scenario: Supervising dual 3.3V supplies in PLC I/O modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Temperature-stable supervisor maintaining ±1.5% threshold accuracy across -40°C to +85°C. Use Value: Guarantees consistent reset behavior without recalibration, supporting extended industrial lifecycle requirements. |
Use Scenario: Providing fail-safe reset during battery voltage sag in handheld medical devices. IC Role / Device Role / Timing Role: Ultra-low-current (14µA) supervisor enabling multi-year operation on coin-cell backup. Use Value: Extends usable battery life while ensuring safe shutdown before critical undervoltage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTTGD2+T | Same package and pinout, but 130ms (min) reset timeout instead of 210ms | Suitable where shorter reset hold time is acceptable for faster boot cycles | Select when system initialization completes in <130ms and tighter timing margin is needed |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), open-drain RST, 200ms timeout, higher 25µA ICC | Lacks VCC2 monitoring capability; requires external pullup resistor | Choose only for single-rail 3.3V systems where dual-monitoring is unnecessary and cost is prioritized |
Compared with MAX6720UTTGD3+T, the MAX6720UTTGD2+T offers identical functionality with reduced timeout, while TPS3808G33DBVR sacrifices dual-supply capability and push-pull drive for lower unit cost in simpler applications.
Availability
MAX6720UTTGD3+T is available at Aetrix Electronics and suitable for computers/servers, telecom/networking equipment, and industrial equipment requiring stable component supply, long-lifecycle support, and guaranteed industrial-temperature operation.
Supply support for MAX6720UTTGD3+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, sensing, and interface applications, with emphasis on high reliability and low power.
The MAX6715–MAX6729 family delivers ultra-low-voltage, dual/triple-supply microprocessor supervisors optimized for space-constrained, multirail embedded systems demanding robust brownout protection and minimal quiescent current.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6720UTTGD3+T?
The MAX6720UTTGD3+T has factory-trimmed reset thresholds of 3.075V (typical) for both VCC1 and VCC2, with ±1.5% tolerance over temperature. This is confirmed by the "TG" suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide, where "T" = 3.075V for VCC1 and "G" = 3.075V for VCC2. The MAX6720UTTGD3+T does not support adjustable thresholds - it is a fixed dual-threshold variant.
Does the MAX6720UTTGD3+T support watchdog functionality?
No, the MAX6720UTTGD3+T does not include a watchdog timer. Per Maxim's Selector Guide, only MAX6721 through MAX6729 variants integrate WDI functionality. The MAX6720UTTGD3+T is a dual-supply supervisor with manual reset (MR) and push-pull RST output, but no watchdog input or timeout monitoring capability.
What is the function of Pin 6 (NC) on the MAX6720UTTGD3+T?
Pin 6 on the MAX6720UTTGD3+T is designated NC (No Connect) and is internally unused. It must be left floating or tied to GND per Maxim's layout recommendations to avoid parasitic coupling. This pin is not bonded and carries no electrical function - unlike MAX6723–MAX6727 variants, the MAX6720UTTGD3+T does not use Pin 6 for RSTIN or PFI.
Can the MAX6720UTTGD3+T monitor a third voltage such as a battery rail?
No, the MAX6720UTTGD3+T cannot monitor a third voltage. It is a dual-supply supervisor (VCC1 + VCC2 only) with no RSTIN or PFI input. Third-voltage monitoring is supported only by MAX6719/MAX6720 variants with "RSTIN" or "PFI" in their feature set - but the MAX6720UTTGD3+T specifically omits these inputs, as confirmed by its pin configuration (6-pin SOT23 with Pins 1–5 assigned to RST/GND/MR/VCC2/VCC1) and Selector Guide entry.
What is the maximum supply voltage the MAX6720UTTGD3+T can tolerate on VCC1 and VCC2?
The MAX6720UTTGD3+T supports absolute maximum supply voltages of +6V on both VCC1 and VCC2, as specified in the Absolute Maximum Ratings table. However, functional operation is guaranteed only from 0.8V to 5.5V. Operation above 5.5V risks permanent damage, and the device is not characterized beyond 5.5V - so the MAX6720UTTGD3+T must be used within 0.8V–5.5V for reliable supervision.
MAX6720UTTGD3+T 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:
- 1.11V, 3.075V, 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-6
MAX6720UTTGD3+T FAQ
1.How can I place an order for MAX6720UTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTTGD3+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 MAX6720UTTGD3+T reliable?
The price and inventory of MAX6720UTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720UTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTTGD3+T?
MAX6720UTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTTGD3+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 MAX6720UTTGD3+T?
For technical support, including MAX6720UTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTTGD3+T requirements.
6.How does Aetrix verify that MAX6720UTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720UTTGD3+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 MAX6720UTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720UTTGD3+T?
All MAX6720UTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTTGD3+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 MAX6720UTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6720UTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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