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Analog Devices Inc./Maxim Integrated MAX6720UTVHD3+
- Part No.:
- MAX6720UTVHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6720UTVHD3+.pdf
- Description:
- MAX6720UTVHD3+
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Product details
Overview
MAX6720UTVHD3+ 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 MAX6720UTVHD3+ datasheet, MAX6720UTVHD3+ pinout, MAX6720UTVHD3+ application, or MAX6720UTVHD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and guaranteed reset assertion during power-up sequencing where VCC1/VCC2 cross 0.8V.
Technical Context
The MAX6720UTVHD3+ implements a dual-threshold voltage monitor with factory-trimmed VTH1 = 4.625V (±1.5%) and VTH2 = 3.075V (±1.5%), plus an independent high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset timeout is fixed at 210ms (min), generated by an on-chip RC oscillator with ±20% tolerance over -40°C to +85°C.
This device uses BiCMOS process (1072 transistors) to achieve 14µA typical ICC1 at 3.6V while maintaining push-pull RST output capable of sinking 3.2mA at VCC1 ≥ 4.5V (VOL ≤ 0.4V) and sourcing 800µA (VOH ≥ 0.8×VCC1). The MR input includes a 50kΩ internal pullup to VCC1 and supports 1µs minimum pulse width with 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (±1.5%) - sets precise brownout detection point for primary 5V/4.8V rails without external resistors |
| VCC2 Reset Threshold | 3.075V (±1.5%) - enables accurate monitoring of secondary 3.3V/3.0V supplies in mixed-voltage systems |
| RSTIN Reference Voltage | 626.5mV (±2.5%) - allows external resistor-divider to monitor third supply as low as 0.62V with <25nA input bias |
| Reset Timeout Period | 210ms (min) - ensures sufficient hold time for processor initialization after power stabilization |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent load on battery-backed or energy-constrained rails |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems including telecom line cards |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup resistor and drives µP reset pin directly |
Pinout & Package
MAX6720UTVHD3+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks 3.2mA at VCC1 ≥ 4.5V (VOL ≤ 0.4V) |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; accepts TTL/CMOS logic levels |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VTH2 comparator and RST2 logic if present |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, VTH1 comparator, and RST output driver |
| 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 ±1.5%, VTH2 = 3.075V ±1.5% - eliminates calibration overhead in production test |
| Externally adjustable third-voltage monitor | RSTIN with 626.5mV reference and <25nA input current - enables monitoring of 0.62V–5.5V rails using two resistors |
| Guaranteed reset validity down to 0.8V | Functional reset assertion even when VCC1 or VCC2 drops to 0.8V - ensures fail-safe behavior during deep brownout |
| Immunity to short VCC transients | Rejects negative-going glitches <20µs wide at 100mV overdrive - prevents spurious resets in noisy power environments |
| Low supply current | 14µA typical at 3.6V - extends battery life in portable equipment and reduces self-heating in dense PCB layouts |
Applications
| Telecom Line Card Power Monitoring | Industrial PLC CPU Board |
|---|---|
|
Use Scenario: Monitoring +48V DC-DC converted 5V and 3.3V rails alongside isolated 1.2V FPGA core supply in carrier-grade line cards. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting synchronized reset to ARM Cortex-A9 processor and CPLD upon any rail undervoltage event. Use Value: Prevents firmware corruption during partial power loss by holding reset until all three rails stabilize above their precise thresholds (4.625V/3.075V/0.62V). |
Use Scenario: Ensuring deterministic startup of dual-core microcontroller in programmable logic controller with separate I/O and analog supply domains. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V I/O rail and 2.5V analog rail, with RSTIN monitoring isolated 5V CAN transceiver supply. Use Value: Eliminates need for discrete voltage detectors and RC timers, reducing BOM count by 3 components while improving threshold accuracy to ±1.5%. |
| Network Switch ASIC Power Sequencing | Medical Infusion Pump Controller |
|
Use Scenario: Coordinating power-up sequence of 12V, 5V, and 1.8V supplies feeding multi-die Ethernet switch ASIC with strict voltage ramp requirements. IC Role / Device Role / Timing Role: Dual-threshold monitor for main 5V/1.8V rails plus RSTIN-based monitoring of 3.3V management controller supply. Use Value: Provides 210ms reset hold time aligned with ASIC tRST specification, ensuring clock PLL lock before release from reset. |
Use Scenario: Supervising battery-backed 3.3V MCU rail and 5V motor driver supply in Class II medical device with mandatory fault logging. IC Role / Device Role / Timing Role: Critical safety monitor asserting reset on VCC1 drop below 4.625V or VCC2 drop below 3.075V, with MR enabling clinician-initiated reboot. Use Value: Meets IEC 62304 clause 5.5.3 for hardware-initiated reset during power anomaly, with <20µs transient immunity preventing false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTVHD5+ | Same package and thresholds, but 420ms (min) reset timeout vs. 210ms (min) for MAX6720UTVHD3+ | Suitable for systems requiring longer reset hold time during slow power-rail ramp-up or extended FPGA configuration | Select MAX6720UTVHD5+ only if design requires >210ms timeout; otherwise MAX6720UTVHD3+ provides optimal balance of speed and margin |
| TPS3808G33DBVR | Dual-supply monitor (no RSTIN), 3.3V fixed VDD threshold, 200ms timeout, 2.5µA supply current | Lacks third-voltage monitoring capability and has lower accuracy (±2.5% vs ±1.5%) on 3.3V threshold | Choose TPS3808G33DBVR only for cost-sensitive dual-rail applications where RSTIN functionality is unnecessary and tighter threshold tolerance is not required |
Compared with MAX6720UTVHD5+, the MAX6720UTVHD3+ offers half the reset timeout period for faster system recovery, while versus TPS3808G33DBVR it delivers triple-voltage monitoring, superior threshold accuracy, and higher drive strength-critical for noise-immune reset signaling in industrial environments.
Availability
MAX6720UTVHD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical infusion pumps requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6720UTVHD3+ 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 industrial, automotive, and communications markets, with expertise in power management and reliability-critical supervision.
The MAX6715–MAX6729 family was engineered specifically for multivoltage embedded systems needing simultaneous monitoring of primary, secondary, and auxiliary rails with minimal board space and zero calibration effort.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6720UTVHD3+?
The MAX6720UTVHD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (±1.5%) over the full -40°C to +85°C temperature range. This value is encoded in the "TV" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified during production test-not derived from external resistors or user adjustment.
Does the MAX6720UTVHD3+ support monitoring a third voltage supply?
Yes, the MAX6720UTVHD3+ supports third-voltage monitoring via its RSTIN pin, which compares the applied voltage against an internal 626.5mV reference. By connecting an external resistor divider, users can set the trip point for supplies ranging from 0.62V to 5.5V, enabling flexible auxiliary rail supervision without additional ICs.
What is the reset timeout period for the MAX6720UTVHD3+ and how is it determined?
The MAX6720UTVHD3+ has a fixed minimum reset timeout period of 210ms, indicated by the "D3" suffix in its part number. This duration is generated by an internal RC oscillator and is guaranteed across temperature and voltage; no external capacitor or resistor is needed to set or adjust this timing parameter.
Can the MAX6720UTVHD3+ operate reliably when VCC1 drops below 1.0V?
Yes, the MAX6720UTVHD3+ guarantees correct reset output logic state down to VCC1 or VCC2 = 0.8V. Its internal circuitry remains functional and asserts valid reset even during deep brownout conditions, making it suitable for applications with aggressive power-gating or battery-depletion scenarios.
Is the reset output of the MAX6720UTVHD3+ push-pull or open-drain?
The MAX6720UTVHD3+ features a push-pull active-low reset output (RST pin), eliminating the need for an external pullup resistor. It can source up to 800µA and sink up to 3.2mA at VCC1 ≥ 4.5V, allowing direct connection to microprocessor reset inputs without signal conditioning.
MAX6720UTVHD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6720UTVHD3+ FAQ
1.How can I place an order for MAX6720UTVHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTVHD3+ 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 MAX6720UTVHD3+ reliable?
The price and inventory of MAX6720UTVHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTVHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6720UTVHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTVHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTVHD3+?
MAX6720UTVHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTVHD3+ 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 MAX6720UTVHD3+?
For technical support, including MAX6720UTVHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTVHD3+ requirements.
6.How does Aetrix verify that MAX6720UTVHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6720UTVHD3+ 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 MAX6720UTVHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6720UTVHD3+?
All MAX6720UTVHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTVHD3+, 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 MAX6720UTVHD3+ part is unused and in its original packaging.
Return procedure for MAX6720UTVHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6720UTVHD3+ Tags
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MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
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MCP111T-300E/TT
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MCP120T-315I/TT
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