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Analog Devices Inc./Maxim Integrated MAX6361HUT31+T
- Part No.:
- MAX6361HUT31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361HUT31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6361HUT31+T from Maxim Integrated is a low-power microprocessor supervisory circuit with manual reset input, battery switchover, and power-fail warning functionality. It operates from +1.2V supply, features factory-preset 3.08V reset threshold (±1.5% over temperature), 150ms minimum reset timeout, and active-low open-drain RESET output. Used in portable/battery-powered equipment to ensure reliable µP reset during brownout and backup-battery handover.
For engineers reviewing the MAX6361HUT31+T datasheet, MAX6361HUT31+T pinout, MAX6361HUT31+T application, or MAX6361HUT31+T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V VCC/VBATT, debounced MR input with internal 20kΩ pull-up, battery switchover hysteresis (40mV), transient immunity up to 30µs at 100mV overdrive, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6361HUT31+T integrates precision voltage monitoring, manual reset control, and battery-backed power path management in a single BiCMOS IC. Its reset comparator uses an internal bandgap reference to guarantee 3.08V threshold with ±1.5% accuracy over –40°C to +85°C, while the debounced MR input eliminates external RC filtering.
Battery switchover logic enforces dual conditions: VCC must fall below both the reset threshold *and* VBATT before OUT connects to BATT; recovery requires VCC to rise 20mV above VBATT. The active-low open-drain RESET output sinks ≥1.6mA at VCC ≥2.1V with VOL ≤0.3V, ensuring robust µP reset signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% (factory preset; enables precise monitoring of +3.0V/3.3V rails) |
| Reset Timeout Period | 150ms minimum (guarantees µP initialization completes before release) |
| Supply Voltage Range | +1.2V to +5.5V (supports ultra-low-voltage operation and wide rail compatibility) |
| Supply Current | 11µA typical at VCC = 2.8V (enables multi-year battery life in backup mode) |
| MR Input Pull-Up | 20kΩ internal resistor to VCC (eliminates external component for momentary switch interface) |
| RESET Output Type | Active-low open-drain (allows wired-OR configuration and flexible voltage-level translation) |
| Operating Temperature | –40°C to +85°C (qualified for industrial and extended commercial environments) |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.9mm × 1.6mm × 1.1mm height), RoHS-compliant lead-free (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Sinks ≥1.6mA at VCC ≥2.1V; asserts when VCC < 3.08V, MR low, or during power-up/down sequencing |
| 2 - GND | Ground reference | Common return for VCC, BATT, and output paths; requires low-impedance PCB connection |
| 3 - MR | Manual reset input | Debounced logic input with internal 20kΩ pull-up; asserts reset on logic low; 150ms hold after release |
| 4 - VCC | Main supply input | Primary power source (1.2V–5.5V); powers internal circuitry and supplies OUT during normal operation |
| 5 - OUT | Power output | Switches between VCC and BATT based on voltage comparison; delivers up to 150mA from VCC |
| 6 - BATT | Backup battery input | Connects to Li+ or coin cell; activates OUT sourcing only when VCC < VTH and VCC < VBATT – 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset 3.08V reset threshold | Eliminates external resistor network for +3.0V rail monitoring; ±1.5% tolerance ensures deterministic reset timing across temperature |
| Debounced manual reset input (MR) | Internal RC filtering removes switch bounce; no external components needed for pushbutton interface |
| Battery switchover with 40mV hysteresis | Prevents oscillation during slow VCC ramp-down; guarantees clean transition between main and backup power sources |
| 150ms minimum reset timeout | Meets µP power-on reset timing requirements without external capacitor timing |
| 1.2V operation guarantee | Enables use with emerging ultra-low-voltage microcontrollers and battery-depleted systems |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring nonvolatile memory retention during AC power loss. IC Role / Device Role / Timing Role: Supervisory circuit monitors main supply and triggers seamless switchover to coin-cell backup while asserting reset to halt µP execution until stable power resumes. Use Value: Prevents data corruption in SRAM during brownout; 11µA quiescent current extends battery life beyond 5 years in standby. | Use Scenario: Remote environmental sensors deployed in unattended field locations with intermittent solar charging. IC Role / Device Role / Timing Role: Detects falling VCC from depleting battery, asserts reset to save sensor calibration state, then switches OUT to backup supercapacitor to maintain RTC and memory. Use Value: Dual-voltage monitoring (VCC and RESET IN) enables secondary supply validation; 3.08V threshold matches common 3.0V LDO outputs. |
| POS Terminals | Smart Meters |
Use Scenario: Retail point-of-sale terminals using Li-ion batteries for short-term backup during mains failure. IC Role / Device Role / Timing Role: Provides manual reset via front-panel button (MR pin), monitors 3.3V system rail, and manages battery switchover to preserve transaction logs in SRAM. Use Value: Debounced MR input eliminates false resets from mechanical switch noise; SOT23-6 footprint minimizes PCB area in compact enclosures. | Use Scenario: Electricity meters with tamper-detection circuitry requiring secure power-fail interrupt generation. IC Role / Device Role / Timing Role: Generates power-fail warning signal (via RESET assertion) before VCC drops below 3.08V, enabling firmware to store metering registers and enter secure shutdown. Use Value: Guaranteed reset assertion down to 1.2V VCC ensures reliable signaling even under severe brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT29+T | 2.93V reset threshold (vs. 3.08V); otherwise identical pinout, timing, and features | Optimized for +2.8V/3.0V rails with tighter margin; not suitable where 3.08V threshold is required for 3.3V rail monitoring | Select when system VCC nominal is 2.85V–2.95V and 3.08V would cause premature reset assertion |
| TPS3808G30DBVR | 3.0V fixed threshold, 200ms reset timeout, 1.8V–6.0V supply range, SOT23-6 package | Lacks manual reset input and battery switchover; designed for general-purpose reset only, not backup power management | Choose only if battery backup functionality is unnecessary and longer reset timeout is acceptable |
Compared with MAX6361HUT29+T, the MAX6361HUT31+T provides higher reset threshold margin for 3.3V systems; versus TPS3808G30DBVR, it delivers integrated battery switchover and MR functionality-critical for portable equipment where power continuity and user-initiated reset are mandatory.
Availability
MAX6361HUT31+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 MAX6361HUT31+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6361–MAX6364 family was developed specifically for low-power microprocessor systems needing integrated reset, battery switchover, and manual reset in minimal footprint-targeting portable, battery-backed, and space-constrained embedded designs.
FAQ
What is the exact reset threshold voltage of the MAX6361HUT31+T?
The MAX6361HUT31+T has a factory-preset reset threshold of 3.08V, with ±1.5% accuracy over the full –40°C to +85°C operating temperature range. This value is laser-trimmed during production and does not require external adjustment. The threshold is specified under load conditions (IOUT ≤65mA at VCC = 3.15V) and remains stable across supply voltage variations from 1.2V to 5.5V.
Does the MAX6361HUT31+T support battery backup functionality?
Yes, the MAX6361HUT31+T supports automatic battery backup switchover. When VCC falls below both the 3.08V reset threshold and VBATT – 20mV, the device connects the BATT pin to the OUT pin to maintain power to downstream circuitry such as SRAM. Recovery occurs only when VCC rises 20mV above VBATT, providing 40mV hysteresis to prevent oscillation during slow voltage ramps.
What is the function of the MR pin on the MAX6361HUT31+T?
MR is the manual reset input on the MAX6361HUT31+T. Holding MR low asserts the active-low RESET output for the duration of the low signal plus a guaranteed minimum 150ms after MR returns high. The pin includes an internal 20kΩ pull-up resistor to VCC, allowing direct connection to a normally-open momentary switch tied to ground-no external components are required for basic manual reset functionality.
Can the MAX6361HUT31+T operate with supply voltages below 1.8V?
Yes, the MAX6361HUT31+T is fully specified to operate from +1.2V to +5.5V on both VCC and VBATT inputs. Its internal BiCMOS circuitry maintains guaranteed reset assertion, MR input functionality, and battery switchover behavior down to 1.2V. This capability enables use with ultra-low-voltage microcontrollers and extends operational lifetime in deeply discharged battery scenarios.
What package type and dimensions does the MAX6361HUT31+T use?
The MAX6361HUT31+T uses a 6-pin SOT23 package (outline U6-1), measuring 2.9mm × 1.6mm × 1.1mm in height. It is RoHS-compliant and marked with top-side laser code "AAGH". The package supports standard reflow soldering profiles, including lead-free peak temperatures up to +260°C, and is compatible with automated pick-and-place assembly.
MAX6361HUT31+T 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:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6361HUT31+T FAQ
1.How can I place an order for MAX6361HUT31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361HUT31+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 MAX6361HUT31+T reliable?
The price and inventory of MAX6361HUT31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361HUT31+T is usually 5 days.
3.What payment methods are accepted for MAX6361HUT31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361HUT31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361HUT31+T?
MAX6361HUT31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361HUT31+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 MAX6361HUT31+T?
For technical support, including MAX6361HUT31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361HUT31+T requirements.
6.How does Aetrix verify that MAX6361HUT31+T is sourced from the original manufacturer or authorized distributors?
All MAX6361HUT31+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 MAX6361HUT31+T meets industry standards.
7.What is the process for return or replacement of MAX6361HUT31+T?
All MAX6361HUT31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361HUT31+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 MAX6361HUT31+T part is unused and in its original packaging.
Return procedure for MAX6361HUT31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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