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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 MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
The MAX6722UTSYD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms reset timeout, push-pull active-low RST output, and watchdog timer disabled. It guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V - used in telecom power sequencing and industrial embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6722UTSYD3 datasheet, MAX6722UTSYD3 pinout, MAX6722UTSYD3 application, or MAX6722UTSYD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), immunity to sub-100ns VCC transients, guaranteed operation at 125°C junction temperature, and compatibility with manual-reset and power-fail monitoring interfaces.
Technical Context
This device implements two independent voltage comparators with factory-trimmed thresholds (VTH1 = 4.625V, VTH2 = 3.075V), a digital reset timeout counter (210ms min), and push-pull RST output referenced to VCC1. It lacks RSTIN, WDI, PFI, and PFO pins - confirming it is a fixed dual-threshold variant without adjustable third-voltage or watchdog functionality.
Reset assertion occurs when either VCC1 falls below 4.625V or VCC2 falls below 3.075V; reset remains asserted for ≥210ms after both supplies exceed their thresholds. The internal logic ensures no contention during VCC ramp-up, and the 20µs VCC-to-RST delay enables precise timing control in fast-boot systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over -40°C to +125°C - sets primary supply brownout detection point) |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% - monitors secondary I/O rail integrity) |
| Reset Timeout | 210ms minimum - ensures µP completes boot sequence before releasing reset) |
| Supply Current | 14µA typical at 3.6V - enables battery-backed operation in low-power systems |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Output | Push-pull, active-low RST referenced to VCC1 - eliminates need for external pullup resistor |
| VCC Validity | Guaranteed reset logic validity down to VCC1 or VCC2 = 0.8V - supports deep brownout recovery |
Pinout & Package
MAX6722UTSYD3 is housed in a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and tape-and-reel packaged. 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 - asserts low on VCC1/VCC2 undervoltage and holds for 210ms min |
| 2 | GND | Analog/digital ground reference - must be connected to system ground plane for stable comparator operation |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1 - forces reset when pulled low; debounced by internal 100ns glitch filter |
| 4 | VCC2 | Secondary supply input (3.075V threshold monitor) - powers internal VCC2 comparator and enables dual-rail supervision |
| 5 | VCC1 | Primary supply input (4.625V threshold monitor) - powers device core and defines RST output voltage level |
| 6 | NC | No-connect - internally unconnected; must remain floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (4.625V) and VCC2 (3.075V) with separate comparators - eliminates need for two discrete supervisors |
| Factory-trimmed precision thresholds | ±1.5% tolerance over full temperature range - removes external resistor calibration and reduces BOM count |
| Push-pull RST output | Drives high/low actively without external pullup - simplifies PCB routing and improves noise immunity vs. open-drain alternatives |
| Ultra-low quiescent current | 14µA typical at 3.6V - extends battery life in portable equipment and enables always-on supervision |
| High-temperature operation | Rated for -40°C to +125°C ambient - suitable for engine-control units and industrial PLCs without derating |
Applications
| Telecom Power Sequencing | Industrial Motor Controller |
|---|---|
Use Scenario: Sequencing startup of FPGA, DSP, and analog front-end in base station radio unit with strict voltage ramp requirements. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring VCC1 (5V analog) stabilizes before enabling VCC2 (3.3V digital) and asserting release of FPGA reset. Use Value: Prevents configuration corruption by enforcing 210ms hold time after both rails exceed thresholds - matches FPGA TSTART requirement. | Use Scenario: Monitoring isolated 24V DC bus and 5V logic supply in servo drive module exposed to EMI and thermal cycling. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when 24V rail dips below 22.5V or 5V logic drops below 4.5V. Use Value: Factory-trimmed 4.625V/3.075V thresholds eliminate calibration drift over 125°C operation - maintains trip accuracy across lifetime. |
| Medical Imaging Sensor Node | Automotive ADAS Camera Module |
Use Scenario: Supervising dual-core SoC supply (1.2V core, 3.3V I/O) in portable ultrasound probe with Li-ion battery backup. IC Role / Device Role / Timing Role: Low-current (14µA) supervisor maintaining reset assertion until both supplies stabilize post-battery switchover. Use Value: 0.8V VCC validity guarantee enables clean reset release even during deep battery discharge - prevents partial initialization faults. | Use Scenario: Ensuring safe boot of image signal processor and MIPI interface in rear-view camera operating near engine bay. IC Role / Device Role / Timing Role: High-temp qualified supervisor detecting 5V camera rail collapse and forcing reset before corrupted frame transmission. Use Value: Immunity to <100ns VCC transients avoids spurious resets from ignition noise - meets ISO 11452-4 pulse immunity requirements. |
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 (3.3V threshold only), 200ms timeout, open-drain RST, 1.5µA IQ | Lacks VCC2 monitoring - requires second IC for dual-rail systems | Select when only one supply needs supervision and ultra-low IQ is critical |
| ADM6705ARZ-REEL7 | Dual-supply (3.08V/2.625V thresholds), 200ms timeout, push-pull RST, 20µA IQ | Lower VCC2 threshold (2.625V vs. 3.075V) - unsuitable for 3.3V I/O rail monitoring | Select when monitoring 3.0V/2.5V rails and ADI ecosystem integration is preferred |
Compared with TPS3808G33DBVR and ADM6705ARZ-REEL7, the MAX6722UTSYD3 uniquely delivers matched 4.625V/3.075V thresholds in a single 6-pin SOT23 with push-pull output - reducing board area by 30% versus dual-IC solutions while maintaining 125°C operation and transient immunity.
Availability
MAX6722UTSYD3 is available at Aetrix Electronics and suitable for telecom power sequencing, industrial motor controllers, and automotive ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
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 demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage µP supervisory circuits optimized for dual/triple supply monitoring in space-constrained, high-reliability systems - with emphasis on factory-trimmed accuracy, wide temperature operation, and minimal external components.
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 (±1.5% over -40°C to +125°C). This value is encoded in the "SY" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified in the Electrical Characteristics table of the official datasheet. The MAX6722UTSYD3 does not support adjustment of this threshold.
Does the MAX6722UTSYD3 include a watchdog timer function?
No, the MAX6722UTSYD3 does not include a watchdog timer. Its "D3" suffix indicates a 210ms reset timeout period but no WDI pin or watchdog logic - confirmed by the absence of WDI in its pin configuration and the omission of watchdog parameters in its specific ordering table. For watchdog capability, consider MAX6723UTSYD3 or MAX6729UTSYD3 variants.
What is the function of Pin 6 on the MAX6722UTSYD3?
Pin 6 on the MAX6722UTSYD3 is a no-connect (NC) terminal - internally unconnected and not bonded. It must remain floating or be tied to GND per Maxim's layout recommendations to avoid parasitic coupling. This differs from other variants like MAX6729A which use Pin 6 for PFO, confirming MAX6722UTSYD3's simplified dual-supply-only feature set.
Can the MAX6722UTSYD3 monitor a 1.8V supply as VCC2?
No, the MAX6722UTSYD3 is factory-configured for VCC2 = 3.075V threshold and cannot monitor 1.8V supplies. Its VCC2 input accepts voltages from 0.9V to 3.3V, but the internal comparator trips only at 3.075V. To supervise a 1.8V rail, select a variant with "R" or "Z" suffix (e.g., MAX6720UTRZD3, VTH2 = 2.625V) or use an external resistor divider on RSTIN - though MAX6722UTSYD3 lacks RSTIN pin.
What is the maximum allowable VCC transient duration that will not trigger reset on the MAX6722UTSYD3?
According to the Typical Operating Characteristics graph "Maximum VCC Transient Duration vs. Reset Threshold Overdrive", the MAX6722UTSYD3 tolerates negative-going VCC transients up to ~1.2µs when the overdrive is 100mV below threshold, and up to ~100ns at 200mV overdrive. This immunity is enabled by internal filtering and is validated across -40°C to +125°C - making MAX6722UTSYD3 suitable for noisy industrial environments.
MAX6722UTSYD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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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