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Analog Devices Inc./Maxim Integrated MAX6722UTSDD3+T
- Part No.:
- MAX6722UTSDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6722UTSDD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,200
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Product details
Overview
MAX6722UTSDD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory IC monitoring VCC1 (primary) and VCC2 (secondary) supplies, with manual reset input (MR), watchdog timer (WDI), and push-pull active-low RST output. It asserts reset if either supply drops below factory-trimmed thresholds (VTH1 = 3.075 V, VTH2 = 2.925 V), maintains reset for 210 ms (min), and operates from -40°C to +85°C in 6-pin SOT23-6 package. Used in telecom power sequencing and server board management.
For engineers reviewing the MAX6722UTSDD3+T datasheet, MAX6722UTSDD3+T pinout, MAX6722UTSDD3+T application, or MAX6722UTSDD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temp), guaranteed reset validity down to VCC1/VCC2 = 0.8 V, 14 µA typical supply current at 3.6 V, and integrated watchdog with 35 s startup / 1.12 s normal timeout.
Technical Context
The MAX6722UTSDD3+T implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds and 20 ppm/°C tempco. Its reset logic combines ORed fault detection (VCC1 undervoltage, VCC2 undervoltage, MR low, WDI timeout) with a monolithic timeout counter ensuring minimum 210 ms reset assertion after all faults clear.
It integrates a dual-mode watchdog: 35 s (min) initial timeout after any reset event enables safe boot sequences, followed by 1.12 s (min) normal mode requiring periodic WDI edge transitions. The push-pull RST output is referenced to VCC1 and sinks up to 3.2 mA at 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075 V (typ), ±1.5% over -40°C to +85°C - ensures reliable reset assertion during 3.3 V rail brownout |
| VCC2 Threshold | 2.925 V (typ), ±1.5% over -40°C to +85°C - matches common 3.0 V I/O supply monitoring |
| Reset Timeout | 210 ms (min) - meets JEDEC JESD8-12B requirement for processor initialization hold time |
| Supply Current | 14 µA (typ) at 3.6 V - enables battery-backed systems to maintain supervision >10 years on coin cell |
| Watchdog Timeout | 1.12 s (min) normal mode - detects firmware hangs within sub-second latency |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8 V - guarantees clean reset assertion during deep brownout recovery |
| Output Type | Push-pull active-low RST - eliminates external pull-up resistor, reduces BOM count and layout area |
Pinout & Package
MAX6722UTSDD3+T is housed in a 6-pin SOT23-6 package (2.9 mm × 1.6 mm × 1.1 mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with a dot; device orientation follows standard SOT23 pinout with GND at Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks 3.2 mA at 4.5 V, drives µP RESET pin directly |
| 2 | GND | Analog/digital ground reference for all comparators and internal logic; must be low-impedance connection |
| 3 | MR | Active-low manual reset input with 50 kΩ internal pull-up to VCC1; 1 µs minimum pulse width, immune to <100 ns glitches |
| 4 | VCC2 | Secondary supply input (0.9 V to 3.3 V); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | WDI | Watchdog input; rising/falling edge clears 1.12 s timeout; high/low >35 s triggers reset after power-up |
| 6 | VCC1 | Primary supply input (1.8 V to 5.0 V); powers core logic, sets RST output reference, and enables reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | VCC1 and VCC2 thresholds trimmed separately - enables precise tracking of asymmetric rails (e.g., 3.3 V core + 2.5 V I/O) |
| Guaranteed reset validity to 0.8 V | Operates correctly even as VCC1 or VCC2 collapses - prevents spurious release during brownout recovery |
| Integrated dual-mode watchdog | 35 s startup + 1.12 s normal timeout - supports complex boot loaders while catching runtime hangs |
| Push-pull RST output | No external pull-up required - reduces component count, PCB space, and signal rise-time uncertainty |
| Low 14 µA supply current | Enables always-on supervision in energy-constrained applications like IoT edge nodes and portable medical devices |
Applications
| Telecom Power Sequencing | Server Board Management |
|---|---|
Use Scenario: Sequencing multiple DC/DC converters in 48 V telecom line cards where 12 V, 5 V, and 3.3 V rails must power up/down in strict order. IC Role / Device Role / Timing Role: Dual-supply monitor asserts reset until both primary (12 V) and secondary (3.3 V) rails stabilize within tolerance, blocking CPU execution until sequencing completes. Use Value: Prevents latch-up and configuration corruption by enforcing minimum 210 ms reset hold time after rail convergence. | Use Scenario: Monitoring redundant 12 V and 5 V PSUs in rack-mounted servers, with watchdog supervision of BMC firmware. IC Role / Device Role / Timing Role: MAX6722UTSDD3+T watches both PSU outputs and feeds WDI from BMC GPIO; asserts RST on PSU failure or BMC hang. Use Value: Enables autonomous failover without host intervention - 1.12 s watchdog timeout detects stalled firmware faster than OS-level health checks. |
| Industrial PLC I/O Modules | Portable Medical Devices |
Use Scenario: Ensuring deterministic startup of isolated analog front-ends and digital controllers in programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervises 24 V field bus supply (VCC1) and 3.3 V logic rail (VCC2); MR input tied to emergency stop circuit for hardware-initiated reset. Use Value: ±1.5% threshold accuracy over -40°C to +85°C eliminates calibration drift, maintaining functional safety integrity per IEC 61508. | Use Scenario: Battery-powered ultrasound handhelds requiring ultra-low quiescent current and robust brownout protection during Li-ion discharge (3.6 V → 2.8 V). IC Role / Device Role / Timing Role: Monitors main battery (VCC1) and regulated 3.0 V analog supply (VCC2); push-pull RST drives ARM Cortex-M reset pin directly. Use Value: 14 µA supply current extends battery life >12 months in standby; reset valid down to 0.8 V prevents premature shutdown at end-of-discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single-supply monitor (VDD only); no VCC2 input; fixed 3.3 V threshold; open-drain RST | Lacks secondary supply monitoring - requires separate IC for VCC2 supervision | Select when only primary rail supervision is needed and open-drain output is acceptable |
| ADM6702SRTZ-REEL7 | Triple-supply monitor (V1/V2/V3); 200 ms reset timeout; 25 µA supply current; push-pull RST | Supports third voltage via RSTIN - adds complexity but enables auxiliary rail monitoring | Select when monitoring three rails (e.g., 5 V, 3.3 V, 1.8 V) is required in same footprint |
Compared with TPS3808G33DBVR and ADM6702SRTZ-REEL7, the MAX6722UTSDD3+T uniquely balances dual-rail precision (±1.5% thresholds), ultra-low current (14 µA), and integrated watchdog - making it optimal for space-constrained, battery-aware, and safety-critical dual-supply systems where VCC2 monitoring is mandatory.
Availability
MAX6722UTSDD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, server board management, industrial PLC I/O modules, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722UTSDD3+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 demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervision with integrated watchdog and manual reset - engineered specifically for reliability-critical embedded systems where power integrity and deterministic reset behavior are non-negotiable.
FAQ
What are the factory-trimmed reset thresholds for MAX6722UTSDD3+T?
The MAX6722UTSDD3+T has VCC1 reset threshold of 3.075 V (typ) and VCC2 reset threshold of 2.925 V (typ), both factory-trimmed to ±1.5% over -40°C to +85°C. These values are encoded in the "SD" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are confirmed in the Electrical Characteristics table of the MAX6722UTSDD3+T datasheet.
Does MAX6722UTSDD3+T support watchdog functionality, and what are its timing modes?
Yes, MAX6722UTSDD3+T includes a dual-mode watchdog timer. After any reset event, it enters a 35 s (min) startup mode to accommodate system boot; upon first valid WDI transition, it switches to 1.12 s (min) normal mode. This architecture is explicitly documented in the MAX6722UTSDD3+T Functional Description and Typical Operating Characteristics.
What is the reset timeout period of MAX6722UTSDD3+T, and how is it set?
The MAX6722UTSDD3+T has a minimum reset timeout period of 210 ms, set by the "D3" suffix in the part number per Maxim's Reset Timeout Period Suffix Guide. This value is guaranteed over temperature and supply voltage, and appears in the Electrical Characteristics table under parameter tRP with conditions D3.
Is MAX6722UTSDD3+T compatible with 1.8 V logic systems?
Yes, MAX6722UTSDD3+T guarantees valid reset operation when VCC1 or VCC2 ≥ 0.8 V, and its MR input accepts TTL/CMOS levels (VIL = 0.3 × VCC1, VIH = 0.7 × VCC1). With VCC1 = 1.8 V, MR thresholds are 0.54 V / 1.26 V - fully compatible with 1.8 V logic families as specified in the MAX6722UTSDD3+T Electrical Characteristics.
What package type and pin count does MAX6722UTSDD3+T use?
MAX6722UTSDD3+T uses a 6-pin SOT23-6 package (2.9 mm × 1.6 mm × 1.1 mm), RoHS-compliant and lead-free, indicated by the "+T" suffix. This is confirmed in Maxim's Ordering Information table and Pin Configurations section for the MAX6722UTSDD3+T device.
MAX6722UTSDD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.788V, 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-6
MAX6722UTSDD3+T FAQ
1.How can I place an order for MAX6722UTSDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTSDD3+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 MAX6722UTSDD3+T reliable?
The price and inventory of MAX6722UTSDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTSDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6722UTSDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTSDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTSDD3+T?
MAX6722UTSDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTSDD3+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 MAX6722UTSDD3+T?
For technical support, including MAX6722UTSDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTSDD3+T requirements.
6.How does Aetrix verify that MAX6722UTSDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6722UTSDD3+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 MAX6722UTSDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6722UTSDD3+T?
All MAX6722UTSDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTSDD3+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 MAX6722UTSDD3+T part is unused and in its original packaging.
Return procedure for MAX6722UTSDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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