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Analog Devices Inc./Maxim Integrated MAX6361PUT44+
- Part No.:
- MAX6361PUT44+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361PUT44+.pdf
- Description:
- MAX6361 LOW-POWER MICROPROCESSO
- Quantity:
- Payment:
- Shipping:
Inventory:781
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Product details
Overview
MAX6361PUT44+ from Maxim Integrated is a low-power microprocessor supervisory circuit with battery switchover, factory preset 4.25V reset threshold (min), 150ms reset timeout, active-low push-pull reset output, and manual reset input. It operates from +1.2V supply and supports SRAM backup in brownout conditions for portable instrumentation and industrial controllers.
For engineers reviewing the MAX6361PUT44+ datasheet, MAX6361PUT44+ pinout, MAX6361PUT44+ application, or MAX6361PUT44+ equivalent, this page delivers verified functional identity, SOT23-6 pin mapping, battery switchover timing behavior, reset propagation delay under VCC transients, and direct alternatives with documented threshold and output structure differences.
Technical Context
The MAX6361PUT44+ integrates precision voltage monitoring, debounced manual reset assertion, and bidirectional power-path control between VCC and BATT to maintain SRAM retention during main supply failure. Its internal MOSFET enables automatic switchover when VCC falls below VBATT by ≥20mV, with 40mV hysteresis preventing oscillation.
Reset assertion occurs when VCC drops below 4.25V (min), remains active for ≥150ms after VCC recovers above threshold, and is also triggered by logic-low MR input. The active-low push-pull RESET output drives µP reset inputs directly without external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.25V (min), 4.38V (max) - ensures reliable reset initiation for +5V/3.3V systems with margin against supply droop |
| Reset Timeout Period | 150ms (min) - guarantees µP initialization completes before release from reset state |
| Supply Voltage Range | +1.2V to +5.5V - supports ultra-low-voltage operation and compatibility with Li+ battery-backed systems |
| Supply Current (VCC) | 11µA (typ at 2.8V), 15µA (max at 5.5V) - enables multi-year battery life in always-on backup mode |
| Battery Standby Current | 0.02µA (max) - minimizes drain on backup cell during extended VCC outage |
| VCC-to-OUT On-Resistance | 2.25Ω (typ at 2.3V/25mA) - limits voltage drop and self-heating during high-current SRAM supply |
| MR Input Pull-Up | 20kΩ internal - eliminates need for external resistor in manual reset switch interface |
Pinout & Package
Package: SOT23-6, -40°C to +85°C operating range, 6-pin surface-mount package with 1.3mm × 2.9mm footprint and 0.95mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for all internal circuits and output drivers |
| VCC | Main supply input | Primary power source; powers internal circuitry and supplies OUT when above reset threshold |
| MR | Manual reset input | Active-low input with 20kΩ internal pull-up; asserts reset when pulled ≤0.3·VCC |
| BATT | Backup battery input | Connects to Li+ or coin cell; automatically powers OUT when VCC < VBATT −20mV |
| OUT | Power output | Switched output sourcing from VCC or BATT; delivers up to 150mA to SRAM or real-time clock |
| RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks 1.6mA at 0.4V or sources 1mA at 0.8·VCC |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset 4.25V reset threshold | Eliminates external resistor divider and calibration for +5V system monitoring |
| Debounced manual reset input | Internal filtering prevents false resets from switch bounce or EMI on MR line |
| 150ms minimum reset timeout | Ensures µP clocks stabilize and memory initializes before release from reset |
| Automatic battery switchover with 40mV hysteresis | Prevents rapid toggling during slow VCC decay near VBATT crossing point |
| 1.2V minimum operating voltage | Enables operation down to end-of-life battery voltage in long-duration backup applications |
Applications
| Portable Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous sensor data capture powered by Li+ battery with mains fallback; must retain RAM contents during AC loss. IC Role / Device Role / Timing Role: Supervisory controller managing VCC/BATT switchover and asserting µP reset during brownout. Use Value: 0.02µA battery standby current extends backup runtime; 150ms reset timeout aligns with µP boot sequence. | Use Scenario: Remote I/O node in factory automation requiring deterministic restart after 24VDC supply interruption. IC Role / Device Role / Timing Role: Power-fail detector and reset generator ensuring clean µC reboot without corrupted register states. Use Value: 4.25V threshold matches 24V-to-5V regulator dropout; MR input allows field-service forced reset. |
| Medical Handheld Monitors | Smart Energy Meters |
Use Scenario: Battery-powered vital-sign monitor storing last readings during power-off; requires zero data loss across supply transitions. IC Role / Device Role / Timing Role: SRAM power manager and reset coordinator maintaining memory integrity during VCC collapse. Use Value: 2.25Ω VCC-to-OUT RON limits voltage sag under 100mA SRAM load; 1.2V operation preserves function as battery depletes. | Use Scenario: Utility meter with nonvolatile memory retaining tariff data and consumption logs during grid outages. IC Role / Device Role / Timing Role: Backup supervisor enabling seamless transition to coin-cell power without interrupting metrology engine. Use Value: Automatic switchover at VCC < VBATT −20mV avoids glitch-induced memory corruption; 11µA supply current extends 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT44+ | Same reset threshold (4.25V min), but active-high push-pull RESET output | Requires µP with active-high reset input; incompatible with standard active-low reset designs | Select only if target µP reset pin expects high-active assertion and board layout accommodates different output polarity |
| MAX6363PUT44+ | Same 4.25V threshold and SOT23-6 package, but adds BATT ON output and omits MR input | Lacks manual reset capability; provides battery-status flag instead of user-initiated reset | Choose when system requires battery-backup status indication but does not need field-service reset functionality |
Compared with MAX6361PUT44+, MAX6361HUT44+ changes reset polarity without altering timing or switchover behavior, while MAX6363PUT44+ trades MR for BATT ON-altering system-level control architecture rather than just signal polarity.
Availability
MAX6361PUT44+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial controllers, and medical monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX6361PUT44+ 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 in industrial, automotive, and computing markets.
The MAX6361 family delivers integrated power-supply supervision and battery switchover for µP-based systems where reliability, low quiescent current, and small footprint are critical in space-constrained, battery-backed equipment.
FAQ
What is the exact reset threshold voltage range for MAX6361PUT44+?
The MAX6361PUT44+ has a factory-preset reset threshold of 4.25V (minimum), 4.38V (maximum), and 4.25V (typical) at +25°C. This range is guaranteed over the full -40°C to +85°C operating temperature range and applies specifically to the PUT44+ variant as defined in Maxim's Ordering Information table. The threshold is trimmed during production and does not require external components.
Does MAX6361PUT44+ support automatic battery switchover, and what are the switching conditions?
Yes, MAX6361PUT44+ supports automatic battery switchover. It switches OUT from VCC to BATT when VCC falls below the reset threshold *and* VCC is at least 20mV lower than VBATT. Switchover back to VCC occurs when VCC rises 20mV above VBATT. This 40mV hysteresis prevents oscillation during slow supply transitions, and the behavior is confirmed in the Pin Description and Detailed Description sections of the datasheet.
What is the function of the MR pin on MAX6361PUT44+, and does it require an external pull-up?
The MR pin on MAX6361PUT44+ is a debounced manual reset input that asserts the RESET output when pulled low. It features a 20kΩ internal pull-up resistor, so no external pull-up is required. A normally open momentary switch from MR to GND provides full manual reset functionality, and the internal debounce eliminates need for external RC filtering in most applications.
Can MAX6361PUT44+ operate with a 1.2V supply, and what is its supply current at that voltage?
Yes, MAX6361PUT44+ operates down to +1.2V on VCC or VBATT. At VCC = 1.2V, the supply current is 10µA (minimum), 30µA (typical), and 50µA (maximum) across temperature. This ultra-low operating voltage enables use with depleted lithium batteries, and the sub-50µA max current ensures multi-year operation in always-on backup configurations.
What is the maximum output current capability of the OUT pin on MAX6361PUT44+?
The OUT pin on MAX6361PUT44+ can source up to 150mA when powered from VCC at VCC = 4.75V, 65mA at VCC = 3.15V, and 25mA at VCC = 2.38V. These ratings are specified in the Electrical Characteristics table under "VCC to OUT On-Resistance" and correspond to guaranteed voltage drop limits (e.g., ≤0.4V at 150mA). The device includes short-circuit protection for up to 10 seconds.
MAX6361PUT44+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Open Drain or Open Collector
- 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
MAX6361PUT44+ FAQ
1.How can I place an order for MAX6361PUT44+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361PUT44+ 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 MAX6361PUT44+ reliable?
The price and inventory of MAX6361PUT44+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361PUT44+ is usually 5 days.
3.What payment methods are accepted for MAX6361PUT44+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361PUT44+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361PUT44+?
MAX6361PUT44+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361PUT44+ 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 MAX6361PUT44+?
For technical support, including MAX6361PUT44+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361PUT44+ requirements.
6.How does Aetrix verify that MAX6361PUT44+ is sourced from the original manufacturer or authorized distributors?
All MAX6361PUT44+ 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 MAX6361PUT44+ meets industry standards.
7.What is the process for return or replacement of MAX6361PUT44+?
All MAX6361PUT44+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361PUT44+, 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 MAX6361PUT44+ part is unused and in its original packaging.
Return procedure for MAX6361PUT44+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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