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Analog Devices Inc./Maxim Integrated MAX6722UTVHD3+
- Part No.:
- MAX6722UTVHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6722UTVHD3+.pdf
- Description:
- MAX6722UTVHD3+
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Product details
Overview
The MAX6722UTVHD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, push-pull active-low RST output, manual reset input (MR), and watchdog timer support. It ensures reliable system reset during power-up, brownout, or software fault conditions in battery-powered and telecom equipment.
For engineers reviewing the MAX6722UTVHD3+ datasheet, MAX6722UTVHD3+ pinout, MAX6722UTVHD3+ application, or MAX6722UTVHD3+ equivalent, key selection criteria include dual-supply monitoring range (1.8V–5.0V / 0.9V–3.3V), guaranteed reset validity down to VCC = 0.8V, low 14µA typical supply current at 3.6V, and integrated watchdog with 35s startup + 1.12s normal timeout periods.
Technical Context
The MAX6722UTVHD3+ implements dual independent voltage comparators with precision internal references (±1.5% threshold accuracy), hysteresis of 0.5%, and temperature coefficient of 20ppm/°C. Its reset logic asserts RST low when either VCC1 falls below 4.625V or VCC2 drops below 3.075V, holding reset for ≥210ms after both supplies recover.
It integrates a dual-mode watchdog timer: 35s minimum initial timeout after any reset event (power-up, MR, or watchdog-triggered), transitioning to 1.12s minimum normal timeout after first WDI edge detection. The MR input features internal 50kΩ pullup to VCC1 and 1µs minimum pulse width requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% tolerance; monitors primary supply up to 5.0V) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% tolerance; monitors secondary supply down to 0.9V) |
| Reset Timeout | 210ms min (ensures µP completes boot before release; D3 suffix) |
| Supply Current | 14µA typ at 3.6V (enables multi-year operation in battery-backed systems) |
| Watchdog Period | 35s min startup / 1.12s min normal (supports complex boot sequences and rapid fault detection) |
| Operating Temp | -40°C to +85°C (qualified for industrial and telecom environments) |
| Reset Output | Push-pull active-low RST (drives directly without external pullup; VOL ≤ 0.4V @ 3.2mA) |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free (+ suffix), footprint compatible with industry-standard SOT23 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output; asserted low during fault; drives µP reset pin directly |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; initiates reset on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal circuitry when > VCC1 and sets VCC2 monitor reference |
| 5 | WDI | Watchdog input; rising/falling edge resets 1.12s timer; long idle (>35s) triggers reset |
| 6 | VCC1 | Primary supply input (1.8V–5.0V); powers device when > VCC2 and sets VCC1 monitor reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity down to 0.8V | Ensures correct RST logic state even during deep brownout-no external pullup needed for push-pull output |
| Dual-mode watchdog timer | 35s startup window allows full system initialization; 1.12s normal mode detects stalled firmware within milliseconds |
| Immunity to short VCC transients | Rejects glitches <20µs duration (at 100mV overdrive), preventing spurious resets in noisy power environments |
| Low quiescent current | 14µA typical at 3.6V enables use in always-on, energy-constrained applications like IoT sensors |
Applications
| Telecom Power Management | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring redundant DC-DC outputs in base station power modules where VCC1 = 4.8V (main rail) and VCC2 = 3.3V (control rail). IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RST to ARM Cortex-M7 processor upon undervoltage on either rail. Use Value: Prevents corrupted firmware execution during partial power loss; 210ms timeout aligns with DC-DC recovery timing. | Use Scenario: Ensuring deterministic restart of programmable logic controller after AC mains interruption or brownout. IC Role / Device Role / Timing Role: Supervising 5V I/O rail (VCC1) and 2.5V FPGA core rail (VCC2) while feeding watchdog signal from FPGA GPIO. Use Value: 35s watchdog startup accommodates FPGA configuration time; 1.12s normal timeout catches lockups in ladder logic scan cycles. |
| Portable Medical Monitor | Set-Top Box Power Sequencing |
Use Scenario: Battery-powered ECG monitor using Li-ion (4.2V max) and LDO-regulated 3.0V analog front-end supply. IC Role / Device Role / Timing Role: Reset generator triggered by VCC1 (battery) drop below 4.625V or VCC2 (AFE) fall below 3.075V, with MR tied to emergency shutdown button. Use Value: 14µA supply current extends battery life; guaranteed reset down to 0.8V prevents undefined behavior during final battery discharge. | Use Scenario: Coordinating power-up sequence of SoC (1.2V core), DDR memory (1.5V), and HDMI PHY (3.3V) in consumer STB. IC Role / Device Role / Timing Role: Monitoring 3.3V (VCC1) and 1.5V (VCC2) rails; RST held until both stabilize, then released after 210ms to meet SoC tRST specification. Use Value: Eliminates need for discrete RC reset circuits; factory-trimmed thresholds ensure consistent timing across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6722UTVHD5+ | Same dual-supply monitoring and watchdog, but 420ms reset timeout (D5 suffix) instead of 210ms | Suitable where longer reset hold time is required for slower peripherals or legacy µPs | Select MAX6722UTVHD5+ only if system boot sequence exceeds 210ms; otherwise MAX6722UTVHD3+ provides optimal timing margin |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only), no watchdog, open-drain RST, 200ms timeout, SOT23-6 | Lacks VCC2 monitoring and watchdog; requires external pullup and separate MR circuitry | Use only for cost-sensitive single-rail applications where dual monitoring and watchdog are unnecessary |
Compared with MAX6722UTVHD5+, the MAX6722UTVHD3+ offers tighter reset timing control for faster-booting systems; versus TPS3808G33DBVR, it delivers integrated dual-rail supervision and watchdog functionality in the same 6-pin footprint-reducing BOM count and PCB area.
Availability
MAX6722UTVHD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and portable medical devices requiring stable component supply, long-lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6722UTVHD3+ 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 in industrial, automotive, and communications markets.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory functions in miniature SOT23 packages-targeting space-constrained, battery-operated, and high-reliability embedded systems.
FAQ
What are the exact reset threshold voltages for MAX6722UTVHD3+?
The MAX6722UTVHD3+ has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over -40°C to +85°C. These values are encoded in the "VH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table of the official datasheet. The MAX6722UTVHD3+ does not support adjustable thresholds-RSTIN is not implemented in this variant.
Does MAX6722UTVHD3+ support watchdog functionality, and how is it configured?
Yes, the MAX6722UTVHD3+ includes a dual-mode watchdog timer with 35s minimum startup period and 1.12s minimum normal timeout. Configuration requires connecting WDI (Pin 5) to a µP GPIO that toggles during normal operation. No external components or register writes are needed-the MAX6722UTVHD3+ automatically enters normal mode after the first WDI edge within the 35s window. This behavior is intrinsic to the MAX6722UTVHD3+ silicon design.
What is the reset output type of MAX6722UTVHD3+, and can it drive a µP reset pin directly?
The MAX6722UTVHD3+ features a push-pull active-low RST output (Pin 1), capable of sinking 3.2mA while maintaining VOL ≤ 0.4V. This allows direct connection to most µP reset pins without an external pullup resistor. The output is referenced to VCC1 and remains valid down to VCC1 = 0.8V-confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the MAX6722UTVHD3+ datasheet.
How does the manual reset (MR) input function on MAX6722UTVHD3+?
The MR input (Pin 3) is an active-low signal with internal 50kΩ pullup to VCC1. Pulling MR low for ≥1µs forces RST low for the full 210ms timeout period, regardless of VCC levels. If unused, MR may be left floating or tied to VCC1. The MAX6722UTVHD3+ datasheet specifies MR's VIH = 0.7×VCC1 and VIL = 0.3×VCC1, making it compatible with standard CMOS logic driving the MAX6722UTVHD3+.
Is MAX6722UTVHD3+ qualified for industrial temperature range, and what packaging does it use?
Yes, the MAX6722UTVHD3+ is specified for -40°C to +85°C operation and supplied in a RoHS-compliant, lead-free 6-pin SOT23-6 package (indicated by the "+" suffix). The package dimensions, thermal characteristics, and soldering profile match JEDEC MO-178AB standards. This qualification is documented in the Ordering Information and Absolute Maximum Ratings sections of the MAX6722UTVHD3+ datasheet.
MAX6722UTVHD3+ 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:
- -
MAX6722UTVHD3+ FAQ
1.How can I place an order for MAX6722UTVHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTVHD3+ 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 MAX6722UTVHD3+ reliable?
The price and inventory of MAX6722UTVHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTVHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6722UTVHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTVHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTVHD3+?
MAX6722UTVHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTVHD3+ 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 MAX6722UTVHD3+?
For technical support, including MAX6722UTVHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTVHD3+ requirements.
6.How does Aetrix verify that MAX6722UTVHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6722UTVHD3+ 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 MAX6722UTVHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6722UTVHD3+?
All MAX6722UTVHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTVHD3+, 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 MAX6722UTVHD3+ part is unused and in its original packaging.
Return procedure for MAX6722UTVHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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