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Analog Devices Inc./Maxim Integrated MAX6722AUTYDD3+
- Part No.:
- MAX6722AUTYDD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6722AUTYDD3+.pdf
- Description:
- MAX6722AUTYDD3+
- Quantity:
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Product details
Overview
MAX6722AUTYDD3+ from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, push-pull active-low RST output, and manual-reset input - deployed in telecom power systems to ensure reliable boot sequencing and brownout recovery.
For engineers reviewing the MAX6722AUTYDD3+ datasheet, MAX6722AUTYDD3+ pinout, MAX6722AUTYDD3+ application, or MAX6722AUTYDD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over -40°C to +125°C), guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA typical supply current at 3.6V, and compatibility with manual-reset and watchdog-free system architectures.
Technical Context
The MAX6722AUTYDD3+ integrates two independent voltage comparators with hysteresis (0.5% of threshold), a precision 140ms reset timeout timer, and a manual-reset input with internal 50kΩ pullup to VCC1. It asserts RST low when either VCC1 drops below its factory-trimmed threshold (e.g., 3.075V typ for 'T' suffix) or VCC2 falls below its corresponding threshold (e.g., 3.075V typ for 'T'), maintaining reset for ≥140ms after both supplies recover.
Its push-pull RST output is referenced to VCC1 and drives high to ≥0.8×VCC1 (at 150µA), while sinking capability meets 0.3V max at 1.2mA for VCC1 ≥2.7V. The device operates across -40°C to +125°C and guarantees functional reset assertion even when VCC1 or VCC2 decays to 0.8V - critical for fail-safe power-down in industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.000V to 3.150V (factory-trimmed 'T' suffix; ±1.5% tolerance ensures precise 3.3V rail supervision) |
| VCC2 Reset Threshold | 3.000V to 3.150V (matching 'T' suffix; enables coordinated monitoring of dual 3.3V domains) |
| Reset Timeout Period | 140ms minimum (D3 suffix; provides sufficient hold time for FPGA configuration or flash boot) |
| Supply Current | 14µA typical at 3.6V (enables >10-year battery life in always-on monitoring nodes) |
| Operating Temperature | -40°C to +125°C (AEC-Q100-qualified variant available; supports under-hood automotive use) |
| Reset Output Type | Push-pull active-low (RST referenced to VCC1; eliminates external pullup and reduces BOM count) |
| Manual-Reset Input | Internal 50kΩ pullup to VCC1; 1µs minimum pulse width (supports tactile switch interface without debounce) |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage or MR activation; holds for ≥140ms |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output drivers; must be low-impedance connection |
| 3 - MR | Active-low manual-reset input | Internally pulled up to VCC1 (50kΩ); logic-low pulse ≥1µs forces reset; immune to <100ns glitches |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator chain; monitors 0.9V–3.3V rails; threshold set by 'T' suffix (3.075V typ) |
| 5 - VCC1 | Primary supply input | Powers core logic and RST driver; monitors 1.8V–5.0V rails; threshold set by 'T' suffix (3.075V typ) |
| 6 - NC | No connect | Unbonded pin; must remain floating per datasheet; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 and VCC2 with separate, factory-trimmed thresholds avoids single-point failure in multirail systems |
| Guaranteed reset validity down to 0.8V | Ensures correct RST logic state even during deep brownout - critical for orderly shutdown in power-constrained edge devices |
| 140ms minimum reset timeout | Meets JEDEC JESD74A requirements for microprocessor initialization timing in telecom baseband processors |
| Push-pull RST output | Eliminates need for external pullup resistor, reducing PCB area and enabling direct interface to CMOS reset inputs |
| Immunity to short VCC transients | Withstands ≤20µs negative-going glitches at 100mV overdrive - prevents spurious resets in noisy industrial environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Coordinating startup of FPGAs, DSPs, and analog front-ends in 48V-powered remote radio units. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset across three voltage domains (12V, 3.3V, 1.8V) using resistor-divider scaling on VCC2 and RSTIN. Use Value: Prevents metastability during power-up by enforcing 140ms minimum reset hold time, matching FPGA configuration clock requirements. | Use Scenario: Ensuring deterministic restart after AC line sags in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Monitoring both 24V DC input and internal 5V/3.3V regulation rails; MR tied to front-panel reset button. Use Value: Guarantees reset remains asserted until both rails exceed 0.8V - enabling safe state recovery even during partial brownout. |
| Automotive ADAS Camera ECU | Portable Medical Infusion Pump |
Use Scenario: Supervising dual power paths (battery backup + main 5V rail) in vision-processing ECUs operating at -40°C to +105°C. IC Role / Device Role / Timing Role: Using VCC1 for main rail (3.3V), VCC2 for backup rail (2.8V); reset timeout set to 140ms to accommodate sensor warm-up delay. Use Value: Factory-trimmed thresholds eliminate calibration overhead; 14µA quiescent current extends battery runtime during standby. | Use Scenario: Maintaining safe operation during battery voltage decay in Class II medical devices with dual Li-ion cells. IC Role / Device Role / Timing Role: Monitoring primary 3.3V system rail and secondary 1.8V MCU core rail; MR connected to emergency stop button. Use Value: Push-pull RST output directly drives MCU reset pin without pullup, reducing component count and improving IEC 62304 compliance margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single-supply only (monitors VCC only); 3.08V fixed threshold; 200ms timeout; open-drain RST | Lacks VCC2 monitoring capability; requires external divider for auxiliary rail supervision | Select when only one rail needs supervision and open-drain flexibility is preferred |
| ADM6705ARTZ-REEL7 | Single-supply (VCC only); 3.08V threshold; 200ms timeout; push-pull RST; no MR input | No manual-reset support; no dual-rail capability; higher 25µA supply current | Choose for cost-sensitive, single-rail applications where MR is unnecessary |
Compared with TPS3808G33DBVR and ADM6705ARTZ-REEL7, the MAX6722AUTYDD3+ uniquely delivers integrated dual-supply monitoring with matched thresholds, manual-reset input, and lower quiescent current - making it optimal for space-constrained multivoltage systems requiring deterministic reset coordination.
Availability
MAX6722AUTYDD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive ADAS modules, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722AUTYDD3+ 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 management, sensing, and interface applications - serving automotive, industrial, and communications markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems where simultaneous, independent monitoring of primary and secondary supplies is essential for safety-critical boot integrity.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6722AUTYDD3+?
The MAX6722AUTYDD3+ uses the 'T' suffix, specifying a VCC1 reset threshold of 3.000V (min) to 3.150V (max), with 3.075V typical, and an identical VCC2 threshold range. These factory-trimmed values are guaranteed over -40°C to +125°C and enable precise supervision of standard 3.3V rails without external calibration. The MAX6722AUTYDD3+ datasheet confirms this in the Electrical Characteristics table under VTH1 and VTH2 for suffix 'T'.
Does the MAX6722AUTYDD3+ support monitoring a third voltage rail?
No, the MAX6722AUTYDD3+ is a dual-supply supervisor and does not include the RSTIN input required for adjustable third-rail monitoring. That functionality is present only in variants like MAX6723A–MAX6727A. The MAX6722AUTYDD3+ pinout shows pins 1–6 assigned to RST, GND, MR, VCC2, VCC1, and NC - with no RSTIN or PFI terminal. Its design focuses on coordinated dual-rail supervision without auxiliary inputs.
What is the function of Pin 6 (NC) on the MAX6722AUTYDD3+?
Pin 6 on the MAX6722AUTYDD3+ is designated NC (No Connect) and is internally unbonded. It must remain unconnected - neither routed nor soldered - to avoid violating the device's absolute maximum ratings or causing unpredictable behavior. This pin exists for mechanical compatibility with other SOT23-6 variants in the MAX6715A–MAX6729A family but serves no electrical function in the MAX6722AUTYDD3+.
Can the MAX6722AUTYDD3+ operate with VCC1 = 1.8V and VCC2 = 1.2V simultaneously?
Yes, the MAX6722AUTYDD3+ supports VCC1 as low as 1.8V and VCC2 as low as 0.9V, so operation at VCC1 = 1.8V and VCC2 = 1.2V is fully specified. Its reset comparators remain functional, and the push-pull RST output maintains VOH ≥0.8×VCC1 (≥1.44V at 150µA) and VOL ≤0.3V (at 1.2mA sink). This makes the MAX6722AUTYDD3+ suitable for low-voltage IoT edge nodes with split-core architectures.
Is the MAX6722AUTYDD3+ watchdog-capable?
No, the MAX6722AUTYDD3+ does not include a watchdog timer. Watchdog functionality is reserved for variants with 'W' in the ordering code (e.g., MAX6721A–MAX6729A). The MAX6722AUTYDD3+ pinout lacks WDI, and its functional diagram omits the watchdog block. It provides only dual-voltage supervision, manual reset, and fixed 140ms timeout - ideal for systems where software-level watchdogs are handled externally.
MAX6722AUTYDD3+ 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:
- -
MAX6722AUTYDD3+ FAQ
1.How can I place an order for MAX6722AUTYDD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722AUTYDD3+ 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 MAX6722AUTYDD3+ reliable?
The price and inventory of MAX6722AUTYDD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722AUTYDD3+ is usually 5 days.
3.What payment methods are accepted for MAX6722AUTYDD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722AUTYDD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722AUTYDD3+?
MAX6722AUTYDD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722AUTYDD3+ 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 MAX6722AUTYDD3+?
For technical support, including MAX6722AUTYDD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722AUTYDD3+ requirements.
6.How does Aetrix verify that MAX6722AUTYDD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6722AUTYDD3+ 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 MAX6722AUTYDD3+ meets industry standards.
7.What is the process for return or replacement of MAX6722AUTYDD3+?
All MAX6722AUTYDD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722AUTYDD3+, 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 MAX6722AUTYDD3+ part is unused and in its original packaging.
Return procedure for MAX6722AUTYDD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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