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Analog Devices Inc./Maxim Integrated MAX6361LUT44+
- Part No.:
- MAX6361LUT44+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361LUT44+.pdf
- Description:
- MAX6361 LOW-POWER MICROPROCESSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,975
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Product details
Overview
MAX6361LUT44+ from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 4.4V reset threshold, active-low push-pull RESET output, and manual reset input (MR). It operates from +1.2V supply, provides 150ms minimum reset timeout, guarantees RESET validity down to 1.2V, and supports battery switchover for SRAM backup in brownout conditions. Used in portable/battery-powered equipment requiring reliable power monitoring and controlled system reset.
For engineers reviewing the MAX6361LUT44+ datasheet, MAX6361LUT44+ pinout, MAX6361LUT44+ application, or MAX6361LUT44+ equivalent, key selection criteria include its 4.4V precision reset threshold, SOT23-6 package, MR debounced input, guaranteed 1.2V operation, and push-pull RESET output structure - all critical for embedded µP systems with tight voltage margins and battery-backup requirements.
Technical Context
The MAX6361LUT44+ integrates precision voltage monitoring, manual reset assertion, and battery-backed power switchover in a single BiCMOS IC. Its internal comparator monitors VCC against a factory-trimmed 4.4V threshold (±1.5% over temperature), and asserts RESET when VCC falls below that level or when MR is pulled low.
It features a debounced MR input with 20kΩ internal pull-up, guarantees RESET assertion during power-up/down/brownout, and maintains RESET active for ≥150ms after VCC rises above threshold or MR transitions high. The push-pull RESET output drives directly without external pull-up and remains valid down to 1.2V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40V (factory preset, ±1.5% over -40°C to +85°C) - ensures reliable detection of 4.4V supply droop before µP malfunction. |
| Supply Voltage Range | +1.2V to +5.5V (VCC or VBATT) - enables operation directly from low-voltage batteries or partially discharged rails. |
| Reset Timeout Period | ≥150ms - guarantees sufficient hold time for µP initialization and memory stabilization after power recovery. |
| Supply Current (No Load) | 15µA typical at VCC = 5.5V - minimizes quiescent drain in always-on battery-backed applications. |
| RESET Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures fast, rail-to-rail logic-level drive. |
| Battery Switchover Hysteresis | 40mV (VBATT − VCC) - prevents oscillation during slow VCC decay near switchover point. |
| MR Input Pull-Up | 20kΩ internal to VCC - allows direct connection of momentary switch to GND without external components. |
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 push-pull reset output | Drives µP reset pin low during fault; no external pull-up required; valid down to 1.2V supply. |
| 2: GND | Ground reference | Common return for VCC, BATT, and internal circuitry; must be low-impedance connection. |
| 3: MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ); debounced to reject noise. |
| 4: VCC | Main supply input | Primary power source; monitored for reset threshold violation; powers internal circuitry and OUT when active. |
| 5: OUT | Power output for SRAM or backup load | Switches between VCC and BATT based on voltage comparison; delivers up to 150mA from VCC. |
| 6: BATT | Backup battery input | Provides backup power to OUT when VCC drops below threshold and VBATT > VCC + 20mV. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.4V reset threshold | Factory-trimmed ±1.5% over full temperature range - eliminates need for external resistor divider calibration. |
| Debounced MR input | Internal filtering rejects <100ns glitches; supports direct switch-to-GND interface without RC network. |
| 1.2V guaranteed operation | Full functionality maintained even as VCC decays to 1.2V - ensures reset assertion through deep brownout. |
| Push-pull RESET output | Eliminates external pull-up resistor and associated board space, leakage, and timing uncertainty. |
| Battery switchover with hysteresis | 40mV hysteresis prevents chattering during slow VCC ramp-down near switchover point. |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered handheld glucose meter with volatile SRAM storing calibration data and recent readings. IC Role / Device Role / Timing Role: Supervisory circuit monitors main 3.3V supply and asserts RESET if voltage sags below 4.4V; switches SRAM power to backup Li+ cell during AC loss. Use Value: Prevents SRAM corruption during brief power interruptions and ensures deterministic µP restart after battery switchover. |
Use Scenario: Ruggedized field logger using flash memory and real-time clock, powered by primary 4.2V Li-ion with coin-cell backup. IC Role / Device Role / Timing Role: Detects 4.4V supply collapse during battery swap; holds µC in reset until stable power returns; manages seamless transition to backup power for RTC/SRAM. Use Value: Guarantees data integrity across power source transitions and eliminates firmware-level reset management overhead. |
| POS Terminals | Smart Meters |
Use Scenario: Retail point-of-sale terminal with backup supercapacitor and SRAM cache for transaction buffering. IC Role / Device Role / Timing Role: Monitors 5.0V rail; asserts RESET on undervoltage; enables manual reset via front-panel button connected to MR. Use Value: Ensures transaction rollback safety and supports field service reset without opening enclosure. |
Use Scenario: Electricity meter with metrology ASIC and nonvolatile event logging, operating from mains with backup battery. IC Role / Device Role / Timing Role: Provides precise 4.4V brownout detection for 5V auxiliary supply; controls backup power routing to RAM and RTC during grid outage. Use Value: Meets IEC 62053-21 voltage sag immunity requirements and preserves billing data integrity during extended outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361PUT44+ | Same 4.4V threshold and push-pull RESET, but packaged in leaded SOT23 (-T suffix) instead of lead-free (+ suffix). | Identical electrical behavior; differs only in RoHS compliance and soldering profile (240°C vs. 260°C reflow). | Select MAX6361PUT44+ only if leaded assembly is required; otherwise MAX6361LUT44+ is preferred for RoHS compliance. |
| MAX6361HUT44+ | Same 4.4V threshold but uses active-low open-drain RESET output instead of push-pull. | Requires external pull-up resistor; less suitable for high-speed or low-noise µP reset paths where drive strength matters. | Choose MAX6361HUT44+ only if system already uses open-drain reset architecture; MAX6361LUT44+ simplifies layout and improves noise immunity. |
Compared with MAX6361PUT44+, MAX6361LUT44+ offers RoHS-compliant packaging and higher reflow tolerance; compared with MAX6361HUT44+, it eliminates external pull-up components and provides stronger, faster reset assertion - both delivering tangible BOM and layout savings in new designs.
Availability
MAX6361LUT44+ is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, smart meters, and battery-backed embedded controllers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6361LUT44+ 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 in demanding industrial, medical, and communications applications.
The MAX6361–MAX6364 family was developed specifically for µP-based systems needing integrated power monitoring, manual reset, and battery switchover in ultra-small packages - targeting portable, battery-critical, and reliability-sensitive applications.
FAQ
What is the exact reset threshold voltage of the MAX6361LUT44+?
The MAX6361LUT44+ has a factory-preset reset threshold of 4.40V, with guaranteed tolerance of ±1.5% over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external adjustment. The "44" in the part number explicitly denotes the 4.4V threshold variant within the MAX6361 family.
Does the MAX6361LUT44+ support battery backup, and how does switchover work?
Yes, the MAX6361LUT44+ supports automatic battery backup via its BATT and OUT pins. When VCC falls below the 4.4V reset threshold and VBATT exceeds VCC by at least 20mV, the device connects the backup battery to OUT. A 40mV hysteresis prevents oscillation during slow VCC decay. The MAX6361LUT44+ itself does not provide a BATT ON indicator - that function is exclusive to the MAX6363 variant.
What type of RESET output does the MAX6361LUT44+ have, and why does it matter?
The MAX6361LUT44+ features an active-low push-pull RESET output. Unlike open-drain variants, it actively drives both logic LOW and HIGH states without requiring an external pull-up resistor. This reduces component count, eliminates pull-up leakage current, improves noise immunity, and ensures faster, more deterministic reset timing - critical for µPs with strict reset pulse width requirements.
Can the manual reset input (MR) of the MAX6361LUT44+ be used without external components?
Yes. The MR pin of the MAX6361LUT44+ includes a built-in 20kΩ pull-up resistor to VCC, allowing direct connection of a normally-open momentary switch between MR and GND. No external RC debounce network is needed - the internal circuitry provides glitch rejection for pulses under 100ns. This simplifies PCB layout and lowers BOM cost compared to supervisory ICs requiring external debounce.
Is the MAX6361LUT44+ compatible with 1.2V logic systems?
Yes. The MAX6361LUT44+ guarantees full functionality - including reset assertion, MR detection, and RESET output drive - down to a supply voltage of +1.2V on either VCC or VBATT. This enables reliable operation during deep brownout conditions and compatibility with ultra-low-voltage battery chemistries such as single-cell LiFePO₄ or partially discharged alkaline cells.
MAX6361LUT44+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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-23-6
MAX6361LUT44+ FAQ
1.How can I place an order for MAX6361LUT44+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361LUT44+ 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 MAX6361LUT44+ reliable?
The price and inventory of MAX6361LUT44+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361LUT44+ is usually 5 days.
3.What payment methods are accepted for MAX6361LUT44+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361LUT44+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361LUT44+?
MAX6361LUT44+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361LUT44+ 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 MAX6361LUT44+?
For technical support, including MAX6361LUT44+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361LUT44+ requirements.
6.How does Aetrix verify that MAX6361LUT44+ is sourced from the original manufacturer or authorized distributors?
All MAX6361LUT44+ 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 MAX6361LUT44+ meets industry standards.
7.What is the process for return or replacement of MAX6361LUT44+?
All MAX6361LUT44+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361LUT44+, 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 MAX6361LUT44+ part is unused and in its original packaging.
Return procedure for MAX6361LUT44+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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