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Analog Devices Inc./Maxim Integrated MAX6720UTYDD3+T
- Part No.:
- MAX6720UTYDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTYDD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,011
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Product details
Overview
MAX6720UTYDD3+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 RSTIN (adjustable down to 0.626V) with 210ms minimum reset timeout, push-pull active-low RST output, manual reset input, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom power systems.
For engineers reviewing the MAX6720UTYDD3+T datasheet, MAX6720UTYDD3+T pinout, MAX6720UTYDD3+T application, or MAX6720UTYDD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA supply current at 3.6V, immunity to sub-20µs VCC transients, and compatibility with battery-backed industrial controllers requiring fail-safe reset assertion during brownout.
Technical Context
The MAX6720UTYDD3+T implements independent voltage comparators for VCC1 and VCC2 with factory-trimmed thresholds (4.625V and 3.075V respectively), plus an external RSTIN comparator referenced to a 626.5mV internal bandgap. Reset assertion occurs when any monitored voltage falls below its threshold and remains asserted for a guaranteed minimum 210ms after all voltages recover.
It features a push-pull RST output referenced to VCC1, internal 50kΩ MR pullup, and operates across -40°C to +85°C with supply current as low as 14µA (typ) at 3.6V. The device guarantees valid reset logic state even when VCC1 or VCC2 drops to 0.8V - critical for low-voltage portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over temp) - ensures reliable reset during 5V rail collapse |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over temp) - matches common 3.3V I/O supply tolerance |
| RSTIN Reference | 626.5mV internal bandgap - enables precise third-voltage monitoring via resistor divider |
| Reset Timeout | 210ms min - provides sufficient hold time for FPGA/ASIC configuration recovery |
| Supply Current | 14µA typ at 3.6V - extends battery life in always-on monitoring applications |
| Valid Reset Down To | VCC1 or VCC2 = 0.8V - maintains supervision integrity during deep brownout |
| VCC Transient Immunity | Immune to <20µs negative glitches - prevents spurious resets in noisy power environments |
Pinout & Package
MAX6720UTYDD3+T is housed in a 6-pin SOT23-6 package (1.6mm × 2.9mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with a dot; pinout follows standard SOT23 orientation with GND at pin 2, VCC2 at pin 4, VCC1 at pin 6, MR at pin 3, RST at pin 1, and RSTIN at pin 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1 - drives µP reset directly without external pullup |
| 2 | GND | System ground reference for all comparators and logic - must be low-impedance connection |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1 - debounced by 1µs pulse width requirement |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range) powering VCC2 comparator and RST2 logic - powers device if > VCC1 |
| 5 | RSTIN | High-impedance adjustable monitor input (626.5mV reference) - sets third-voltage trip point via external resistor divider |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range) powering core logic and RST output driver - dominant power source |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1, VCC2, and externally adjustable RSTIN - eliminates need for discrete comparators in multirail systems |
| Push-pull RST output | Active-low output referenced to VCC1 with VOL ≤ 0.4V @ 3.2mA - drives reset lines directly without pullup resistors |
| Factory-trimmed thresholds | VCC1 = 4.625V and VCC2 = 3.075V with ±1.5% max deviation over -40°C to +85°C - reduces BOM count vs. adjustable solutions |
| Low-power operation | 14µA typical supply current at 3.6V - enables use in energy-constrained battery-powered equipment |
| Guaranteed reset validity | Functional reset assertion guaranteed down to VCC1 or VCC2 = 0.8V - supports ultra-low-voltage brownout detection |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 4.8V DC-DC output and secondary 3.3V logic rail in remote radio unit power management. IC Role / Device Role / Timing Role: Triple-supervisory IC asserting reset if either rail drops below threshold or if auxiliary 1.2V core supply (via RSTIN) fails. Use Value: Prevents firmware corruption during partial power loss by holding µP in reset until both rails stabilize for ≥210ms. | Use Scenario: Supervising 5V fieldbus interface and 3.3V microcontroller supply in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Dual-voltage supervisor with manual reset (MR) enabling field technician-initiated system recovery without power cycle. Use Value: Eliminates need for external reset button circuitry while maintaining immunity to EMI-induced false triggers via 100ns MR glitch rejection. |
| Battery-Backed Data Logger | Medical Infusion Pump Controller |
Use Scenario: Monitoring main 3.6V Li-ion supply and backup 3.0V supercapacitor rail in portable environmental data logger. IC Role / Device Role / Timing Role: Triple-supervisor using RSTIN to track supercap voltage decay, triggering graceful shutdown before data loss. Use Value: Enables deterministic low-battery response with 626.5mV RSTIN reference and 210ms timeout - avoids abrupt power-off during write operations. | Use Scenario: Ensuring safe operation of ARM-based pump controller by validating 5V motor driver supply and 3.3V sensor interface supply. IC Role / Device Role / Timing Role: Dual-supervisory IC with push-pull RST driving safety-critical reset line, guaranteeing reset assertion down to 0.8V on either rail. Use Value: Meets IEC 62304 Class C software safety requirements by preventing processor execution during undervoltage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTYDD5+T | Same package and thresholds, but 420ms reset timeout (vs. 210ms) | Suitable where longer reset hold time is required for complex boot sequences | Select when system requires extended reset assertion beyond 210ms - no PCB changes needed |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN), 3.3V fixed VDD threshold, 200ms timeout, 2.5µA quiescent current | Lacks third-voltage monitoring capability; optimized for ultra-low-power single-rail systems | Choose when third-voltage supervision is unnecessary and sub-3µA supply current is mandatory |
Compared with MAX6720UTYDD3+T, the MAX6720UTYDD5+T offers longer reset hold time for demanding boot sequences, while the TPS3808G33DBVR trades RSTIN flexibility for significantly lower quiescent current - making it suitable only for single-rail, battery-critical designs.
Availability
MAX6720UTYDD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6720UTYDD3+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 high-reliability industrial, automotive, and communications systems.
The MAX6715–MAX6729 family delivers compact, low-power supervisory circuits for multivoltage embedded systems - engineered to replace discrete reset solutions while ensuring robust operation across wide temperature and supply ranges.
FAQ
What are the exact factory-trimmed reset thresholds for MAX6720UTYDD3+T?
The MAX6720UTYDD3+T has VCC1 reset threshold of 4.625V (±1.5%) and VCC2 reset threshold of 3.075V (±1.5%), both factory-trimmed and specified over -40°C to +85°C. These values are encoded in the "YD" suffix per Maxim's Reset Voltage Threshold Suffix Guide. The RSTIN input uses a fixed 626.5mV internal reference for third-voltage monitoring. MAX6720UTYDD3+T does not support adjustable VCC1/VCC2 thresholds - only RSTIN is externally configurable.
Does MAX6720UTYDD3+T support watchdog functionality?
No, MAX6720UTYDD3+T does not include watchdog functionality. Per Maxim's Selector Guide, only MAX6721 through MAX6729 variants integrate WDI; MAX6720 is explicitly listed without watchdog input. The MAX6720UTYDD3+T provides triple-voltage supervision (VCC1, VCC2, RSTIN), manual reset (MR), and push-pull RST output - but no watchdog timer. For watchdog capability, consider MAX6722UTYDD3+T or MAX6729KAxxx+T.
What is the function of the RSTIN pin on MAX6720UTYDD3+T?
The RSTIN pin on MAX6720UTYDD3+T is a high-impedance input referenced to a 626.5mV internal bandgap voltage. It enables monitoring of a third system voltage (e.g., 1.2V core rail) using an external resistor divider. When the divided voltage at RSTIN falls below 626.5mV, the device asserts RST. RSTIN requires no external bias and draws only ±25nA - allowing use of megaohm-level resistors to minimize power loss. MAX6720UTYDD3+T uses RSTIN exclusively for undervoltage detection, not power-fail signaling.
Can MAX6720UTYDD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V?
Yes, MAX6720UTYDD3+T supports VCC1 as low as 1.8V and VCC2 as low as 0.9V per datasheet specifications. Its VCC1 threshold of 4.625V is incompatible with 1.8V operation - meaning the device cannot supervise a 1.8V rail as VCC1. However, it can monitor a 1.8V rail as VCC2 (since VCC2 range is 0.9V–3.3V) and a 1.2V rail via RSTIN (using resistor divider to scale to 626.5mV). The device itself remains powered by whichever supply (VCC1 or VCC2) is higher, and guarantees valid reset down to 0.8V on either supply.
What package type and pin count does MAX6720UTYDD3+T use?
MAX6720UTYDD3+T uses a 6-pin SOT23-6 package (1.6mm × 2.9mm footprint, 1.1mm height), RoHS-compliant and lead-free (indicated by "+T" suffix). Pin 1 is RST (active-low push-pull), pin 2 is GND, pin 3 is MR (manual reset), pin 4 is VCC2, pin 5 is RSTIN, and pin 6 is VCC1. This matches the standard SOT23-6 pinout defined in Maxim's Pin Configurations section and is distinct from 5-pin or 8-pin variants in the MAX6715–MAX6729 family.
MAX6720UTYDD3+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:
- 0.788V, 2.188V, 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
MAX6720UTYDD3+T FAQ
1.How can I place an order for MAX6720UTYDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTYDD3+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 MAX6720UTYDD3+T reliable?
The price and inventory of MAX6720UTYDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTYDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720UTYDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTYDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTYDD3+T?
MAX6720UTYDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTYDD3+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 MAX6720UTYDD3+T?
For technical support, including MAX6720UTYDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTYDD3+T requirements.
6.How does Aetrix verify that MAX6720UTYDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720UTYDD3+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 MAX6720UTYDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720UTYDD3+T?
All MAX6720UTYDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTYDD3+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 MAX6720UTYDD3+T part is unused and in its original packaging.
Return procedure for MAX6720UTYDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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