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Analog Devices Inc./Maxim Integrated MAX6362LUT29+T
- Part No.:
- MAX6362LUT29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6362LUT29+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,282
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Product details
Overview
MAX6362LUT29+T from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated watchdog timer, battery switchover, and 2.93V factory-preset reset threshold. It operates from +1.2V supply, provides active-low open-drain RESET output, and delivers 150ms minimum reset timeout - used in portable/battery-powered equipment to ensure reliable µP reset during brownout or power failure.
For engineers reviewing the MAX6362LUT29+T datasheet, MAX6362LUT29+T pinout, MAX6362LUT29+T application, or MAX6362LUT29+T equivalent, key selection criteria include watchdog timeout accuracy (1.6s typ), battery switchover hysteresis (40mV), VCC-to-OUT on-resistance (≤2.7Ω at 2.38V), guaranteed RESET/RESET validity down to 1.2V, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6362LUT29+T implements a dedicated watchdog timer with 1.6s nominal timeout period, triggered by sustained high/low state on WDI input; it asserts RESET pulses upon timeout and clears on any WDI edge. Its internal comparator monitors VCC against a precision 2.93V threshold (±1.5% over -40°C to +85°C) and guarantees reset assertion until VCC rises above threshold and remains stable for ≥150ms.
Battery switchover logic activates when VCC falls below both the reset threshold and VBATT by ≥20mV, connecting BATT to OUT via an internal MOSFET with temperature-stable on-resistance (2.7Ω typ at 25°C, <3.5Ω max over full temp range). The device supports dual-supply operation with independent VCC and VBATT pins, and RESET output remains valid even when VCC drops to 1.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% - ensures precise detection of 3.0V system supply brownout without false triggering. |
| Watchdog Timeout | 1.6s typical (1.0–2.25s min/max) - provides robust software execution monitoring for µP-based systems. |
| Reset Timeout Period | 150ms minimum - guarantees sufficient hold time for µP initialization after power recovery. |
| Supply Voltage Range | +1.2V to +5.5V - enables direct interface with ultra-low-voltage logic and legacy 5V systems. |
| VCC-to-OUT On-Resistance | 2.7Ω typical at VCC = 2.38V - minimizes voltage drop and power loss when sourcing SRAM or real-time clock. |
| Battery Switchover Hysteresis | 40mV - prevents oscillation during slow VCC decay by requiring 20mV rise above VBATT to revert to main supply. |
| Quiescent Current | 15µA typical at VCC = 2.8V - extends battery life in always-on backup applications. |
Pinout & Package
MAX6362LUT29+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, 21-0058 footprint), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low during VCC undervoltage, watchdog timeout, or power-up; requires external pull-up. |
| 2 - GND | Ground reference | Common return path for all internal circuits; must be low-impedance connection to system ground plane. |
| 3 - WDI | Watchdog timer input | Edge-sensitive input; reset cleared on rising/falling edges within 1.6s window; glitch-immune (100ns min pulse width). |
| 4 - VCC | Main supply input | Powers internal circuitry and sources OUT during normal operation; monitored for reset threshold violation. |
| 5 - OUT | Power output | Switches between VCC and BATT based on supply status; delivers up to 150mA to SRAM or RTC in backup mode. |
| 6 - BATT | Backup battery input | Provides seamless power continuity when VCC fails; internal MOSFET connects BATT to OUT with 2.7Ω on-resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog timer with 1.6s timeout | Enables autonomous software hang detection without µP intervention; resets on sustained WDI inactivity. |
| Factory-trimmed 2.93V reset threshold | Eliminates external resistor network for 3.0V supply monitoring; ±1.5% tolerance ensures design margin compliance. |
| Battery switchover with 40mV hysteresis | Prevents chattering during gradual VCC decay; guarantees clean transition to backup power without glitches. |
| 150ms minimum reset timeout | Meets JEDEC JESD76 requirements for µP reset hold time; ensures reliable boot sequence across temperature. |
| 1.2V operating supply support | Allows integration into ultra-low-power systems powered by single-cell Li-ion or coin cells. |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered glucose meters and ECG monitors require uninterrupted memory retention during AC power loss or battery swap. IC Role / Device Role / Timing Role: MAX6362LUT29+T monitors main supply, triggers watchdog if firmware hangs, and switches SRAM to backup battery within 20µs of VCC collapse. Use Value: Prevents data corruption during power transitions and ensures deterministic reset behavior under transient conditions. |
Use Scenario: Remote environmental sensors operate unattended for months on primary battery, with backup cell for critical logging. IC Role / Device Role / Timing Role: MAX6362LUT29+T asserts RESET to halt µP during brownout, maintains SRAM power via BATT, and signals watchdog timeout if sensor firmware stalls. Use Value: Guarantees 100% data integrity across power cycles and eliminates need for external reset supervisor ICs. |
| POS Terminals | Smart Meters |
Use Scenario: Retail point-of-sale terminals experience frequent power interruptions during daily operations and firmware updates. IC Role / Device Role / Timing Role: MAX6362LUT29+T provides 150ms reset hold time after VCC recovery and uses WDI to detect bootloader lockup during OTA update. Use Value: Reduces field failures caused by incomplete firmware writes and ensures safe restart after power glitches. |
Use Scenario: Electricity meters must retain tamper logs and billing data during grid outages lasting hours or days. IC Role / Device Role / Timing Role: MAX6362LUT29+T powers real-time clock and nonvolatile memory from backup battery while asserting RESET to freeze µP execution during undervoltage. Use Value: Enables >10-year backup runtime with sub-µA quiescent current and eliminates external battery management circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6362PUT29+T | Same 2.93V threshold and watchdog function, but features push-pull RESET output instead of open-drain. | Requires no external pull-up resistor; better suited for systems where RESET load capacitance exceeds 50pF. | Select when driving heavy capacitive loads or interfacing with µPs lacking internal pull-ups. |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms timeout, no integrated watchdog; lower quiescent current (1.1µA). | Lacks battery switchover and WDI functionality; intended for simple reset-only applications. | Choose only if watchdog and backup power features are unnecessary and ultra-low ICC is critical. |
Compared with MAX6362PUT29+T, the MAX6362LUT29+T offers greater flexibility with open-drain RESET for wired-OR configurations, while TPS3808G33DBVR trades away core MAX6362LUT29+T capabilities (watchdog, battery switchover) for minimal current draw - making it unsuitable as a functional replacement.
Availability
MAX6362LUT29+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, smart meters, and battery-backed SRAM applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX6362LUT29+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6362LUT29+T belongs to the MAX6361–MAX6364 family of SOT23 µP supervisory circuits designed specifically for battery-backed microprocessor systems requiring precision reset, watchdog monitoring, and seamless power switchover.
FAQ
What is the watchdog timeout accuracy of the MAX6362LUT29+T over temperature?
The MAX6362LUT29+T watchdog timeout is specified from 1.00s to 2.25s over the full -40°C to +85°C operating range, with 1.6s typical at +25°C. This tolerance ensures reliable software hang detection across industrial environments without requiring calibration. The MAX6362LUT29+T uses a precision internal oscillator unaffected by supply voltage variation, maintaining consistent timing behavior regardless of VCC fluctuations between 1.2V and 5.5V.
Does the MAX6362LUT29+T support battery switchover when VCC is zero?
Yes, the MAX6362LUT29+T supports battery switchover even when VCC is at 0V, provided VBATT is ≥2.0V and exceeds VCC by at least 20mV. In this condition, the internal MOSFET connects BATT directly to OUT, delivering up to 10mA with <3.5Ω on-resistance. The MAX6362LUT29+T guarantees this functionality down to 1.2V VBATT, enabling operation from depleted primary supplies while preserving SRAM data integrity.
Can the MAX6362LUT29+T RESET output drive a µP reset pin directly without external components?
No - the MAX6362LUT29+T features an active-low open-drain RESET output, requiring an external pull-up resistor to VCC or another logic supply. Typical values range from 4.7kΩ to 10kΩ depending on bus capacitance and µP input leakage. The MAX6362LUT29+T does not include internal pull-up; omitting the external resistor will leave RESET floating and cause undefined µP behavior during power-up or reset assertion.
What is the maximum load current the MAX6362LUT29+T can deliver through its OUT pin?
The MAX6362LUT29+T delivers up to 150mA from VCC and up to 10mA from BATT when VCC is below threshold. Output current capability depends on input voltage: at VCC = 2.38V, it sustains 25mA with ≤2.7Ω on-resistance; at VCC = 3.15V, it supports 65mA; and at VCC = 4.75V, it handles 150mA. The MAX6362LUT29+T includes short-circuit protection on OUT, limiting fault duration to 10 seconds to prevent thermal damage.
How does the MAX6362LUT29+T handle negative-going VCC transients?
The MAX6362LUT29+T provides inherent immunity to short-duration negative VCC transients: a 100mV dip below the 2.93V threshold can last up to 30µs without triggering reset, per the Maximum Transient Duration vs. Reset Threshold Overdrive curve. Adding a 0.1µF ceramic capacitor close to the VCC pin further suppresses noise. The MAX6362LUT29+T's comparator architecture rejects sub-100ns glitches, ensuring µP stability in electrically noisy environments like motor-driven industrial equipment.
MAX6362LUT29+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:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6362LUT29+T FAQ
1.How can I place an order for MAX6362LUT29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6362LUT29+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 MAX6362LUT29+T reliable?
The price and inventory of MAX6362LUT29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6362LUT29+T is usually 5 days.
3.What payment methods are accepted for MAX6362LUT29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6362LUT29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6362LUT29+T?
MAX6362LUT29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6362LUT29+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 MAX6362LUT29+T?
For technical support, including MAX6362LUT29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6362LUT29+T requirements.
6.How does Aetrix verify that MAX6362LUT29+T is sourced from the original manufacturer or authorized distributors?
All MAX6362LUT29+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 MAX6362LUT29+T meets industry standards.
7.What is the process for return or replacement of MAX6362LUT29+T?
All MAX6362LUT29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6362LUT29+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 MAX6362LUT29+T part is unused and in its original packaging.
Return procedure for MAX6362LUT29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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