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Analog Devices Inc./Maxim Integrated MAX6722UTSYD3+
- Part No.:
- MAX6722UTSYD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6722UTSYD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,912
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Product details
Overview
MAX6722UTSYD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms reset timeout, push-pull active-low RST output, manual reset input, and watchdog timer. It ensures reliable system boot and brownout recovery in low-power embedded systems.
For engineers reviewing the MAX6722UTSYD3+ datasheet, MAX6722UTSYD3+ pinout, MAX6722UTSYD3+ application, or MAX6722UTSYD3+ 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, 14µA typical supply current at 3.6V, and integrated 35s startup + 1.12s normal watchdog timeout.
Technical Context
The MAX6722UTSYD3+ implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (4.625V and 3.075V respectively), hysteresis of 0.5%, and temperature coefficient of 20ppm/°C. Reset assertion occurs on any supply drop below threshold, with minimum 210ms timeout after all supplies recover.
It integrates a dual-mode watchdog timer: 35s minimum initial timeout after power-up/manual reset, transitioning to 1.12s minimum normal timeout after first WDI edge; MR input features internal 50kΩ pullup and 1µs minimum pulse width support. All logic operates validly with VCC1 or VCC2 ≥ 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; enables reliable monitoring of 5V or 4.8V primary rails) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; supports 3.3V I/O or auxiliary supply supervision) |
| Reset Timeout | 210ms (minimum duration RST remains asserted after supply recovery; meets µP reset hold requirements) |
| Supply Current | 14µA typical at 3.6V (ultra-low quiescent current enables use in battery-backed or energy-sensitive systems) |
| Watchdog Timeout | 35s min startup / 1.12s min normal (dual-mode timing prevents false resets during boot while ensuring rapid fault detection in runtime) |
| Operating Temp | -40°C to +85°C (industrial-grade thermal range suitable for telecom, industrial, and networking equipment) |
| Reset Output Type | Push-pull active-low (drives high to VCC1 when deasserted; eliminates need for external pullup resistor) |
Pinout & Package
MAX6722UTSYD3+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pinout conforms to standard MAX6722 variant layout with GND, VCC2, MR, VCC1, RST, and WDI terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage, MR low, or watchdog timeout |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output drivers |
| 3 - MR | Manual reset input | Active-low input with internal 50kΩ pullup to VCC1; forces reset when pulled ≤0.3×VCC1 |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when > VCC1; monitored at 3.075V threshold for secondary rail integrity |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output; monitored at 4.625V threshold |
| 6 - WDI | Watchdog input | Edge-sensitive input; reset triggered if no transition occurs within 1.12s (normal mode) or 35s (startup mode) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | Simultaneous supervision of primary (VCC1) and secondary (VCC2) rails with factory-trimmed thresholds avoids discrete comparator design overhead |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior even during deep brownout conditions where VCC drops near device operational floor |
| Dual-mode watchdog timer | 35s startup window accommodates complex firmware initialization; 1.12s runtime timeout detects stalled code without requiring software reconfiguration |
| Push-pull RST output | Eliminates external pullup resistor requirement, reducing BOM count and PCB area vs. open-drain alternatives |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches at 100mV overdrive, preventing spurious resets in electrically noisy environments |
Applications
| Industrial PLC Power Management | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V main and 3.3V I/O rails in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset during simultaneous or staggered supply faults; 210ms timeout satisfies ARM Cortex-M4 reset hold time. Use Value: Prevents corrupted register states and flash writes during partial power loss, improving field reliability in unattended deployments. |
Use Scenario: Ensuring clean boot and runtime integrity of FPGA-based line interface cards in carrier-grade access equipment. IC Role / Device Role / Timing Role: Primary supervisor for 4.8V analog front-end and 3.3V digital core; WDI tied to FPGA status heartbeat signal. Use Value: Detects FPGA configuration lockup or firmware hang via 1.12s watchdog timeout, enabling autonomous recovery without host intervention. |
| Embedded Network Router Boot Control | Medical Diagnostic Device Power Sequencing |
Use Scenario: Coordinating power-up sequencing and fault response across multiple DC/DC outputs in fanless enterprise routers. IC Role / Device Role / Timing Role: Monitors 5V system rail and 1.2V CPU core rail; MR connected to front-panel reset button. Use Value: Provides hardware-enforced reset hold time and manual recovery path, eliminating reliance on software-initiated reboot sequences. |
Use Scenario: Guaranteeing safe power-down sequence and brownout protection in portable ultrasound imaging units with Li-ion battery backup. IC Role / Device Role / Timing Role: Supervises 3.3V digital subsystem and 2.5V ADC reference rail; operates validly down to 0.8V to catch final battery sag. Use Value: Triggers controlled shutdown before data corruption occurs, preserving patient image integrity during battery depletion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6722UTSVD3+ | VCC1 threshold = 4.375V (vs. 4.625V); same package, timeout, and feature set | Better suited for 4.5V nominal rails with tighter tolerance margins | Select when primary supply nominal is 4.5V rather than 5V; identical pinout and layout |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input, no WDI, 200ms timeout, SOT23-6 | Lacks dual-rail capability and watchdog; lower cost for single-rail simplicity | Choose only if monitoring one rail suffices and watchdog functionality is unnecessary |
Compared with MAX6722UTSYD3+, MAX6722UTSVD3+ offers tighter VCC1 threshold alignment for 4.5V systems but identical supervision architecture, while TPS3808G33DBVR reduces functionality to single-rail monitoring-making it unsuitable for dual-supply integrity assurance or watchdog-dependent safety-critical operation.
Availability
MAX6722UTSYD3+ is available at Aetrix Electronics and suitable for industrial PLC power management, telecom line card supervision, and embedded network router boot control requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6722UTSYD3+ 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 connectivity applications, with emphasis on high-reliability industrial and communications solutions.
The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multivoltage systems where space, power, and deterministic reset behavior are critical-targeting telecom, computing, and portable equipment.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6722UTSYD3+?
The MAX6722UTSYD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (typical falling threshold), with ±125mV tolerance over temperature and supply variations. This value is encoded in the 'Y' suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified across -40°C to +85°C operation. The threshold applies directly to the VCC1 pin and triggers reset assertion when that supply falls below this level.
Does the MAX6722UTSYD3+ support monitoring a third voltage rail?
No, the MAX6722UTSYD3+ is a dual-voltage supervisor and does not include the RSTIN input required for auxiliary voltage monitoring. That function is reserved for MAX6719/MAX6720/MAX6723–MAX6727 variants. The MAX6722UTSYD3+ monitors only VCC1 and VCC2, with fixed thresholds of 4.625V and 3.075V respectively.
What is the watchdog timeout behavior of the MAX6722UTSYD3+ during power-up?
The MAX6722UTSYD3+ implements a dual-mode watchdog: after power-on reset or manual reset, it enters a 35s minimum startup timeout period. Only after detecting the first valid edge on WDI does it switch to the 1.12s minimum normal timeout mode. This prevents premature resets during firmware initialization while ensuring rapid fault detection once the system is operational.
Is the reset output of the MAX6722UTSYD3+ push-pull or open-drain?
The MAX6722UTSYD3+ features a push-pull active-low reset output (RST pin), referenced to VCC1. It actively drives high (to VCC1) when deasserted and low (to GND) when asserted-eliminating the need for an external pullup resistor. This differs from open-drain variants like MAX6721 and simplifies interface with µPs requiring driven-high reset release.
What is the minimum operating voltage for guaranteed reset functionality on the MAX6722UTSYD3+?
The MAX6722UTSYD3+ guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V. Below this level, reset behavior is not specified. This 0.8V guarantee enables robust brownout detection in systems with rapidly collapsing supplies, such as battery-powered devices nearing end-of-life.
MAX6722UTSYD3+ 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:
- 2
- Voltage - Threshold:
- 2.188V, 2.925V
- 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-23-6
MAX6722UTSYD3+ FAQ
1.How can I place an order for MAX6722UTSYD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTSYD3+ 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 MAX6722UTSYD3+ reliable?
The price and inventory of MAX6722UTSYD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTSYD3+ is usually 5 days.
3.What payment methods are accepted for MAX6722UTSYD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTSYD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTSYD3+?
MAX6722UTSYD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTSYD3+ 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 MAX6722UTSYD3+?
For technical support, including MAX6722UTSYD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTSYD3+ requirements.
6.How does Aetrix verify that MAX6722UTSYD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6722UTSYD3+ 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 MAX6722UTSYD3+ meets industry standards.
7.What is the process for return or replacement of MAX6722UTSYD3+?
All MAX6722UTSYD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTSYD3+, 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 MAX6722UTSYD3+ part is unused and in its original packaging.
Return procedure for MAX6722UTSYD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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