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Analog Devices Inc./Maxim Integrated MAX6722UTTZD3+
- Part No.:
- MAX6722UTTZD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6722UTTZD3+.pdf
- Description:
- MAX6722UTTZD3+
- Quantity:
- Payment:
- Shipping:
Inventory:2,313
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Product details
Overview
MAX6722UTTZD3+ 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 multivoltage embedded systems.
For engineers reviewing the MAX6722UTTZD3+ datasheet, MAX6722UTTZD3+ pinout, MAX6722UTTZD3+ application, or MAX6722UTTZD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), guaranteed reset validity down to VCC = 0.8V, low 14µA supply current at 3.6V, and integrated 35s startup / 1.12s normal watchdog timing.
Technical Context
The MAX6722UTTZD3+ implements independent voltage comparators for VCC1 and VCC2 with factory-trimmed thresholds (4.625V and 3.075V), each featuring 20ppm/°C tempco and 0.5% hysteresis. Its reset logic asserts RST low when either supply falls below its threshold and holds for a minimum 210ms after both recover.
It integrates a dual-mode watchdog timer: a 35s minimum startup period following any reset event, followed by a 1.12s minimum normal timeout triggered by WDI edge transitions. The manual reset input (MR) features internal 50kΩ pullup and 200ns MR-to-RST delay, with glitch rejection up to 100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over -40°C to +85°C) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over -40°C to +85°C) |
| Reset Timeout | 210ms min (ensures µP completes initialization before release) |
| Supply Current | 14µA typ at 3.6V (enables battery-backed operation >10 years) |
| Watchdog Periods | 35s min startup + 1.12s min normal (supports complex boot sequences) |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V (guaranteed reset assertion during deep brownout) |
| MR Input Logic | VIL ≤ 0.3×VCC1, VIH ≥ 0.7×VCC1 (TTL/CMOS compatible) |
Pinout & Package
SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+ suffix), -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives high to 0.8×VCC1 when deasserted |
| 2 | GND | System ground reference for all comparators and logic |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers comparator for VCC2 monitoring |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers device core and VCC1 comparator |
| 6 | WDI | Watchdog input; rising/falling edges reset 1.12s timeout; 35s initial window after reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | Simultaneous VCC1/VCC2 supervision with separate thresholds prevents false resets during asymmetric rail sequencing |
| Push-pull RST output | Eliminates need for external pullup resistor; drives high to 0.8×VCC1, low to 0.4V at 3.2mA sink |
| Dual-mode watchdog timer | 35s startup window accommodates full system boot; 1.12s normal mode detects software hangs post-initialization |
| Guaranteed reset at low VCC | Valid reset assertion down to 0.8V on either supply enables robust brownout handling in low-power states |
| Low 14µA supply current | Minimizes quiescent power in always-on monitoring circuits; extends battery life in portable equipment |
Applications
| Computers/Servers | Telecom Equipment |
|---|---|
Use Scenario: Monitoring primary 3.3V I/O rail and secondary 1.8V core rail during cold boot and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset until both rails stabilize above 3.075V and 4.625V respectively, with 210ms hold time. Use Value: Prevents CPU execution on marginal supplies; eliminates need for discrete RC reset networks. | Use Scenario: Ensuring clean reset of baseband processors during AC power interruption or battery switchover. IC Role / Device Role / Timing Role: Supervising 5V system rail and 3.3V management controller rail with manual reset override via front-panel button. Use Value: Guarantees reset assertion even if one rail collapses to 0.8V; supports field-serviceable recovery. |
| Industrial PLCs | Portable Medical Devices |
Use Scenario: Detecting undervoltage on isolated 24V DC input and 5V logic rail in harsh EMI environments. IC Role / Device Role / Timing Role: Providing noise-immune reset with 100ns MR glitch rejection and immunity to sub-20µs VCC transients. Use Value: Maintains deterministic reset behavior without spurious triggers from motor switching noise. | Use Scenario: Managing power-up sequencing and runtime watchdog for battery-powered glucose meters. IC Role / Device Role / Timing Role: Using 35s initial watchdog window to complete sensor calibration, then 1.12s monitoring for firmware lockups. Use Value: Extends single-cell Li-ion battery life beyond 5 years while ensuring fail-safe shutdown on software faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6722UTTVD3+ | VCC1 threshold = 4.375V (vs. 4.625V); same package, timing, and features | Better suited for 4.5V nominal rails with tighter margin; identical pinout and layout | Select when system VCC1 nominal is 4.5V instead of 5.0V to avoid premature reset assertion |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input or WDI; 200ms timeout; SOT23-6 | Lacks dual-rail capability and watchdog; requires external circuitry for second rail monitoring | Choose only for cost-sensitive single-rail designs where VCC2 supervision is handled separately |
Compared with MAX6722UTTVD3+, the MAX6722UTTZD3+ provides higher VCC1 threshold tolerance for 5V systems, while TPS3808G33DBVR reduces functionality to cut BOM cost-neither offers pin-compatible replacement without schematic revision.
Availability
MAX6722UTTZD3+ is available at Aetrix Electronics and suitable for computers/servers, telecom equipment, and industrial PLCs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722UTTZD3+ 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 product line delivers ultra-low-voltage supervisory circuits optimized for multirail systems with tight sequencing requirements, targeting space-constrained embedded designs needing guaranteed reset integrity down to 0.8V.
FAQ
What are the exact reset threshold voltages for MAX6722UTTZD3+?
The MAX6722UTTZD3+ has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% accuracy over the full -40°C to +85°C temperature range and 20ppm/°C tempco. These values are fixed by the "TZ" suffix per Maxim's Reset Voltage Threshold Suffix Guide and do not require external configuration.
Does MAX6722UTTZD3+ support monitoring a third voltage rail?
No, MAX6722UTTZD3+ is a dual-voltage supervisor and does not include the RSTIN input required for triple-voltage monitoring. That functionality is present only in MAX6719/MAX6720/MAX6723–MAX6727 variants. MAX6722UTTZD3+ monitors only VCC1 and VCC2.
What is the watchdog timeout behavior of MAX6722UTTZD3+?
MAX6722UTTZD3+ features a dual-mode watchdog: a 35s minimum initial timeout after any reset event (power-up, MR, or watchdog-triggered), followed by a 1.12s minimum normal timeout that begins after the first valid WDI edge. This allows safe boot completion before strict runtime monitoring commences.
Can MAX6722UTTZD3+ operate with VCC1 below 1.8V?
Yes, MAX6722UTTZD3+ guarantees correct reset output logic state as long as VCC1 or VCC2 remains above 0.8V. While VCC1 nominal range is specified as 1.8V–5.0V, the device remains functional and asserts valid reset down to 0.8V on either supply, enabling use in ultra-low-power brownout scenarios.
What package type and footprint does MAX6722UTTZD3+ use?
MAX6722UTTZD3+ uses the SOT23-6 package (2.9mm × 1.6mm × 1.1mm body size, 0.95mm pitch), with lead-free termination indicated by the "+" suffix. It is compatible with standard SOT23-6 reflow profiles and requires no special PCB layout beyond typical high-impedance analog routing for MR and WDI pins.
MAX6722UTTZD3+ 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:
- -
MAX6722UTTZD3+ FAQ
1.How can I place an order for MAX6722UTTZD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTTZD3+ 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 MAX6722UTTZD3+ reliable?
The price and inventory of MAX6722UTTZD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTTZD3+ is usually 5 days.
3.What payment methods are accepted for MAX6722UTTZD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTTZD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTTZD3+?
MAX6722UTTZD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTTZD3+ 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 MAX6722UTTZD3+?
For technical support, including MAX6722UTTZD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTTZD3+ requirements.
6.How does Aetrix verify that MAX6722UTTZD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6722UTTZD3+ 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 MAX6722UTTZD3+ meets industry standards.
7.What is the process for return or replacement of MAX6722UTTZD3+?
All MAX6722UTTZD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTTZD3+, 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 MAX6722UTTZD3+ part is unused and in its original packaging.
Return procedure for MAX6722UTTZD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6722UTTZD3+ Tags
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MIC826SYMT-TR
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