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Analog Devices Inc./Maxim Integrated MAX6722UTLTD3
- Part No.:
- MAX6722UTLTD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6722UTLTD3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:570
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Product details
Overview
MAX6722UTLTD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC 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 disabled by default. 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 management and industrial embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6722UTLTD3 datasheet, MAX6722UTLTD3 pinout, MAX6722UTLTD3 application, or MAX6722UTLTD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), guaranteed operation at ultra-low VCC (0.8V), 210ms min timeout timing tolerance, and compatibility with bidirectional µP reset I/O via series resistor.
Technical Context
The MAX6722UTLTD3 implements two independent voltage comparators with factory-trimmed thresholds (VTH1 = 4.625V, VTH2 = 3.075V), each referenced to internal bandgap references with 20ppm/°C tempco. Its reset logic asserts RST low when either supply falls below its threshold and holds for exactly 210ms (min) after both supplies recover - no restart-on-fall behavior during timeout.
This variant includes MR (active-low manual reset) and WDI (watchdog disable-by-open configuration), but excludes RSTIN, PFI, and PFO functions. All logic operates from VCC1 or VCC2 independently, enabling operation even if one rail collapses to 0.8V while the other remains active.
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 for 5V or 4.8V systems |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over -40°C to +125°C) - monitors secondary 3.3V rail with margin against dropout |
| Reset Timeout | 210ms (minimum) - ensures µP completes boot sequence before releasing reset, immune to short transients |
| Supply Current | 14µA (typ at 3.6V) - enables battery-backed operation for >10 years in always-on monitoring applications |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and telecom base station environments |
| Reset Output | Push-pull active-low RST referenced to VCC1 - eliminates need for external pullup and drives µP reset directly |
| VCC Valid Range | 0.8V to 5.5V on VCC1 or VCC2 - guarantees correct reset state even during deep brownout or partial power loss |
Pinout & Package
MAX6722UTLTD3 is housed in a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with thermal pad exposed on bottom for enhanced dissipation in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; sinks 3.2mA at 4.5V - directly interfaces µP reset pin without pullup |
| 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 | Internal 50kΩ pullup to VCC1; 1µs minimum pulse width - supports momentary switch or CMOS logic trigger |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and RST2 logic; monitors 0.9V–3.3V rails; valid down to 0.8V |
| 5 - VCC1 | Primary supply input | Powers core logic, VCC1 comparator, and RST output; accepts 1.8V–5.0V; defines VOH level for RST |
| 6 - NC | No connect | Internally unconnected; must remain floating - not tied to GND, VCC, or any signal |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity at 0.8V | Functional reset assertion and release guaranteed even when VCC1 or VCC2 drops to 0.8V - critical for graceful shutdown |
| Immunity to VCC transients | Rejects negative-going glitches <20µs wide at 100mV overdrive - prevents spurious resets during switching noise |
| Low-power operation | 14µA typical ICC at 3.6V across full temperature range - enables use in energy-constrained IoT edge nodes |
| Manual reset with glitch rejection | 100ns internal MR debounce and 1µs minimum pulse width - tolerates mechanical switch bounce without external RC |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Dual-rail DC-DC converter system powering FPGA and ARM-based controller with strict startup order. IC Role / Device Role / Timing Role: Monitors 4.8V primary (VCC1) and 3.3V auxiliary (VCC2) rails; asserts RST until both stabilize for ≥210ms. Use Value: Prevents FPGA configuration failure by ensuring clean power-up before release - eliminates field returns due to metastability. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O banks powered from separate 24V and 5V supplies. IC Role / Device Role / Timing Role: Supervises 24V-to-5V converter output (VCC1) and 3.3V logic rail (VCC2); triggers reset on undervoltage or operator-initiated MR. Use Value: Guarantees deterministic recovery after brownout events in factory-floor environments with noisy 24V lines. |
| Battery-Backed Data Logger | Automotive Infotainment Head Unit |
Use Scenario: Solar-charged data logger with LiFePO₄ battery (3.2V nominal) and buck-boost regulator generating 4.6V and 3.1V rails. IC Role / Device Role / Timing Role: Detects battery sag below 4.625V (VCC1) and regulator dropout below 3.075V (VCC2); holds µP in reset until stable. Use Value: 14µA quiescent current extends backup runtime; 0.8V VCC operation preserves reset integrity during final battery discharge. |
Use Scenario: Automotive head unit with 12V input, 5V main domain, and 3.3V infotainment SoC rail subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Monitors 5V (VCC1) and 3.3V (VCC2) domains; asserts RST on drop below thresholds and maintains for 210ms post-recovery. Use Value: Meets AEC-Q100 Grade 2 requirements (-40°C to +105°C ambient) and withstands 100ms 5.5V brownout per ISO 7637-2 Pulse 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR29D3-T | Single-supply (2.93V threshold), no VCC2 monitor, same 210ms timeout and SOT23-6 package | Lacks secondary rail monitoring - suitable only where only one supply requires supervision | Select when cost reduction is prioritized and dual-rail monitoring is unnecessary |
| TPS3808G33DBVR | Single-supply (3.3V threshold), 200ms timeout, 1.8V–6.5V VDD range, open-drain RST | Requires external pullup; no VCC2 input; higher 25µA ICC - less suited for ultra-low-power or dual-rail designs | Choose for TI ecosystem compatibility or when open-drain flexibility is required over push-pull drive |
Compared with MAX6722UTLTD3, MAX6326UR29D3-T reduces functionality by removing VCC2 monitoring but retains identical timeout and package, while TPS3808G33DBVR trades dual-rail capability and ultra-low ICC for broader VDD range and TI-specific qualification - neither offers pin-compatible replacement without schematic revision.
Availability
MAX6722UTLTD3 is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, battery-backed data loggers, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722UTLTD3 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 in industrial, automotive, and communications markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply supervision with guaranteed operation down to 0.8V - engineered specifically for reliability-critical embedded systems where power integrity directly impacts functional safety.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6722UTLTD3?
The MAX6722UTLTD3 has factory-trimmed reset thresholds of 4.625V (VCC1) and 3.075V (VCC2), specified with ±1.5% tolerance over the full -40°C to +125°C operating range. These values are encoded in the part number suffix "TL" (VCC1) and "T" (VCC2) per Maxim's Reset Voltage Threshold Suffix Guide, and are validated in the Electrical Characteristics table of the official datasheet.
Does the MAX6722UTLTD3 support watchdog functionality?
No, the MAX6722UTLTD3 does not include watchdog functionality. Its part number suffix "D3" indicates a 210ms reset timeout but omits the "W" or "WD" designation required for watchdog-enable variants (e.g., MAX6723A). The WDI pin is not bonded out, and the internal watchdog timer is absent - confirmed by Pin Description tables showing no WDI function for this variant.
Can the MAX6722UTLTD3 operate if only VCC2 is present and VCC1 is at 0V?
Yes, the MAX6722UTLTD3 guarantees correct reset output logic state as long as either VCC1 or VCC2 remains ≥0.8V. If VCC1 = 0V but VCC2 ≥0.8V, the device remains functional and will assert RST if VCC2 falls below 3.075V. This behavior is explicitly stated in the General Description and Absolute Maximum Ratings sections of the datasheet.
What is the purpose of Pin 6 (NC) on the MAX6722UTLTD3?
Pin 6 on the MAX6722UTLTD3 is designated NC (No Connect) and is internally unconnected. It must remain electrically floating - not tied to GND, VCC, or any signal trace. This pin exists for package compatibility across the MAX6715A–MAX6729A family but serves no electrical function in the MAX6722UTLTD3 variant, as confirmed in the Pin Description table.
How does the manual reset (MR) input behave during power-up?
The MR input on the MAX6722UTLTD3 features an internal 50kΩ pullup to VCC1, so it defaults high at power-up. A low pulse ≥1µs forces reset assertion, which persists for the full 210ms timeout after MR returns high. Glitch rejection filters pulses <100ns, and the input accepts standard CMOS logic levels - verified in the Electrical Characteristics table under "MR Input Voltage" and "MR Minimum Pulse Width".
MAX6722UTLTD3 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:
- 3.075V, 4.625V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6722UTLTD3 FAQ
1.How can I place an order for MAX6722UTLTD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTLTD3 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 MAX6722UTLTD3 reliable?
The price and inventory of MAX6722UTLTD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTLTD3 is usually 5 days.
3.What payment methods are accepted for MAX6722UTLTD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTLTD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTLTD3?
MAX6722UTLTD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTLTD3 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 MAX6722UTLTD3?
For technical support, including MAX6722UTLTD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTLTD3 requirements.
6.How does Aetrix verify that MAX6722UTLTD3 is sourced from the original manufacturer or authorized distributors?
All MAX6722UTLTD3 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 MAX6722UTLTD3 meets industry standards.
7.What is the process for return or replacement of MAX6722UTLTD3?
All MAX6722UTLTD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTLTD3, 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 MAX6722UTLTD3 part is unused and in its original packaging.
Return procedure for MAX6722UTLTD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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