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Analog Devices Inc./Maxim Integrated MAX6362LUT31+T
- Part No.:
- MAX6362LUT31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6362LUT31+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
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Product details
Overview
MAX6362LUT31+T from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated watchdog timer, battery switchover, and power-fail warning functionality. It operates from +1.2V supply, features factory-preset 3.08V reset threshold (±1.5% over temperature), 1.6s watchdog timeout, 150ms minimum reset timeout, and active-low open-drain RESET output. It is used in portable/battery-powered equipment to maintain SRAM data integrity during brownout.
For engineers reviewing the MAX6362LUT31+T datasheet, MAX6362LUT31+T pinout, MAX6362LUT31+T application, or MAX6362LUT31+T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V VCC/VBATT, watchdog input (WDI) edge-triggered clearing, battery switchover hysteresis (40mV), SOT23-6 package footprint, and compatibility with 3.3V/2.5V µP systems requiring reliable power monitoring.
Technical Context
The MAX6362LUT31+T implements a dedicated watchdog timer with 1.6s timeout (±30% over temperature), cleared on any rising or falling edge at WDI with ≥100ns pulse width. Its internal comparator monitors VCC against a precision 3.08V threshold (typical), asserting RESET when VCC falls below VTH and holding it for ≥150ms after VCC rises above VTH.
Battery switchover is controlled by dual conditions: VCC must be both below VTH and at least 20mV below VBATT to engage backup mode; a 40mV hysteresis prevents oscillation during slow VCC decay. OUT connects to VCC during normal operation and switches to BATT only when both conditions are met.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% (guaranteed over -40°C to +85°C; enables precise 3.3V supply monitoring) |
| Watchdog Timeout | 1.6s ±30% (ensures µP software hangs trigger reset within defined window) |
| Reset Timeout Period | 150ms minimum (provides sufficient hold time for µP power-up initialization) |
| Supply Voltage Range | +1.2V to +5.5V (supports single-cell Li+ and multi-rail embedded systems) |
| Quiescent Current | 11µA at VCC = 2.8V (enables multi-year battery life in always-on backup mode) |
| Output Type | Active-low open-drain RESET (allows wired-OR configuration with other reset sources) |
| Battery Switchover Hysteresis | 40mV (prevents chattering during gradual VCC decay near VBATT) |
Pinout & Package
Package: 6-pin SOT23 (U6-1, outline 21-0058), RoHS-compliant, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, WDI timeout, or power-down; requires external pull-up for logic-level compatibility |
| 2: GND | Ground reference | Common return path for VCC, VBATT, and all internal circuitry; must be low-impedance connection |
| 3: WDI | Watchdog input | Edge-sensitive input; rising or falling edge within 1.6s clears watchdog timer; no internal pull-up/pull-down |
| 4: VCC | Main supply input | Primary power source; RESET asserted when VCC < 3.08V; powers internal circuitry and drives OUT during normal operation |
| 5: OUT | Power output | Supplies SRAM or real-time clock; sourced from VCC if VCC > VTH, else from greater of VCC or VBATT during backup mode |
| 6: BATT | Backup battery input | Provides backup power when VCC fails; internal MOSFET connects BATT to OUT only when VCC < VTH and VCC < VBATT − 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog Timer with Edge-Clearing | 1.6s timeout cleared on any WDI edge (rising/falling), preventing false resets from stuck loops |
| Guaranteed Reset Below 1.2V | RESET remains valid even as VCC or VBATT drops to 1.2V, ensuring robust brownout detection |
| Low-Power Battery Backup Mode | IBATT standby current ≤0.05µA (−40°C to +85°C), enabling decade-scale coin-cell operation |
| VCC Transient Immunity | Withstands negative-going transients up to 30µs at 100mV overdrive without spurious reset assertion |
| Integrated Battery Switchover Control | Automatic MOSFET-based switchover with 40mV hysteresis eliminates need for external diodes or controllers |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous ECG monitoring powered by coin-cell battery with periodic USB charging. IC Role / Device Role / Timing Role: Supervisory circuit maintains SRAM data during charge interruptions and triggers µP reset on power-up. Use Value: 11µA quiescent current extends battery life; 1.6s watchdog ensures firmware crashes are recovered without manual intervention. | Use Scenario: Remote environmental sensor node logging temperature/humidity to nonvolatile memory using intermittent solar charging. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and asserts reset if voltage sags below 3.08V during low-light periods; switches SRAM to backup battery. Use Value: 3.08V threshold precisely matches 3.3V LDO dropout; 40mV switchover hysteresis prevents repeated toggling during marginal VCC conditions. |
| POS Terminals | Smart Meters |
Use Scenario: Battery-backed point-of-sale terminal with flash memory retention during AC power loss. IC Role / Device Role / Timing Role: Provides power-fail warning and initiates graceful shutdown sequence via µP interrupt before VCC collapse. Use Value: Active-low open-drain RESET allows direct connection to µP reset pin; 150ms timeout ensures complete firmware save before power removal. | Use Scenario: Electricity meter with tamper-detection circuitry requiring persistent timekeeping during grid outages. IC Role / Device Role / Timing Role: Supplies RTC and secure memory from backup battery while isolating main supply faults. Use Value: Guaranteed 1.2V operation preserves reset function even as backup cell depletes to end-of-life voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6362HUT31+T | Same 3.08V threshold and watchdog, but rated for higher temperature range (−40°C to +125°C) | Suitable for under-hood automotive or industrial environments exceeding +85°C ambient | Select when extended temperature operation is required; otherwise identical functional behavior |
| TPS3808G30DBVR | 3.0V reset threshold, 200ms reset timeout, no integrated watchdog or battery switchover | Lacks WDI and BATT pins; requires external components for backup power management | Choose only if watchdog and battery switchover are not needed; lower cost but higher BOM count |
Compared with MAX6362HUT31+T, the MAX6362LUT31+T offers identical electrical performance at lower cost for commercial-temperature applications; compared with TPS3808G30DBVR, it integrates critical battery switchover and watchdog functions in one SOT23-6 package, reducing board space and design complexity.
Availability
MAX6362LUT31+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, and smart meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6362LUT31+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 and mixed-signal ICs for power, sensing, and connectivity applications.
The MAX6361–MAX6364 family was developed specifically for low-power µP systems needing integrated reset, watchdog, and battery switchover in minimal footprint-targeting portable, battery-backed, and industrial control applications.
FAQ
What is the exact reset threshold voltage of the MAX6362LUT31+T?
The MAX6362LUT31+T has a factory-preset reset threshold of 3.08V, with ±1.5% tolerance guaranteed over the full −40°C to +85°C operating temperature range. This value is laser-trimmed during production and does not require external resistor networks. The MAX6362LUT31+T datasheet specifies typical VTH = 3.08V, min = 3.00V, max = 3.15V at TA = +25°C.
Does the MAX6362LUT31+T support battery backup functionality?
Yes, the MAX6362LUT31+T supports automatic battery backup switchover. When VCC falls below the 3.08V threshold and also drops at least 20mV below VBATT, the device internally connects the BATT pin to the OUT pin to power downstream circuitry such as SRAM. The MAX6362LUT31+T includes built-in hysteresis (40mV) to prevent oscillation during slow VCC decay.
How does the watchdog timer in the MAX6362LUT31+T operate?
The MAX6362LUT31+T watchdog timer has a nominal timeout period of 1.6s (±30% over temperature). It is cleared on any rising or falling edge at the WDI pin with ≥100ns pulse width. If no edge occurs within the timeout window, RESET pulses low for 150ms. The MAX6362LUT31+T watchdog is edge-triggered-not level-sensitive-making it robust against software lockup scenarios.
What is the supply current consumption of the MAX6362LUT31+T in normal operation?
The MAX6362LUT31+T draws only 11µA typical supply current (ICC) at VCC = 2.8V and TA = +25°C, with maximum 15µA over −40°C to +85°C. In battery-backup mode (VCC = 0V, VBATT = 2.8V), BATT standby current is ≤0.05µA. These ultra-low values make the MAX6362LUT31+T suitable for multi-year battery-powered applications.
Is the MAX6362LUT31+T pin-compatible with other members of the MAX6361–MAX6364 family?
Yes, all MAX6361–MAX6364 variants-including MAX6362LUT31+T-share identical SOT23-6 pinout and footprint. Pin 1 is RESET, Pin 2 is GND, Pin 3 is WDI (functionally specific to MAX6362), Pin 4 is VCC, Pin 5 is OUT, and Pin 6 is BATT. However, WDI on MAX6362LUT31+T is not present on MAX6361/MAX6363/MAX6364, so PCB layout must match the intended variant's feature set.
MAX6362LUT31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6362LUT31+T FAQ
1.How can I place an order for MAX6362LUT31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6362LUT31+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 MAX6362LUT31+T reliable?
The price and inventory of MAX6362LUT31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6362LUT31+T is usually 5 days.
3.What payment methods are accepted for MAX6362LUT31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6362LUT31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6362LUT31+T?
MAX6362LUT31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6362LUT31+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 MAX6362LUT31+T?
For technical support, including MAX6362LUT31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6362LUT31+T requirements.
6.How does Aetrix verify that MAX6362LUT31+T is sourced from the original manufacturer or authorized distributors?
All MAX6362LUT31+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 MAX6362LUT31+T meets industry standards.
7.What is the process for return or replacement of MAX6362LUT31+T?
All MAX6362LUT31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6362LUT31+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 MAX6362LUT31+T part is unused and in its original packaging.
Return procedure for MAX6362LUT31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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