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Analog Devices Inc./Maxim Integrated MAX6363LUT31-T
- Part No.:
- MAX6363LUT31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6363LUT31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
MAX6363LUT31-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery switchover and BATT ON indicator functionality, designed for SRAM backup in brownout conditions. It operates from +1.2V supply, features factory-preset 3.08V reset threshold (±1.5% over -40°C to +85°C), 150ms minimum reset timeout, and active-low push-pull RESET output. Used in portable/battery-powered equipment requiring reliable power-fail detection and seamless backup activation.
For engineers reviewing the MAX6363LUT31-T datasheet, MAX6363LUT31-T pinout, MAX6363LUT31-T application, or MAX6363LUT31-T equivalent, key selection criteria include its 3.08V reset threshold accuracy, guaranteed RESET/RESET validity down to 1.2V, battery-on status indication, SOT23-6 package footprint, and compatibility with +2.5V/+3.0V/+3.3V systems.
Technical Context
The MAX6363LUT31-T implements precision voltage monitoring using an internal bandgap reference to compare VCC against a 3.08V threshold. When VCC falls below this level and VBATT exceeds VCC by ≥20mV, it activates battery switchover to OUT while asserting RESET and driving BATT ON high.
Its internal MOSFET switch enables automatic SRAM power sourcing from backup battery during brownout, with on-resistance dependent on VBATT (e.g., 2.7Ω at VBATT = 2.8V, IOUT = 10mA). The BATT ON output provides direct logic-level indication of active battery-backup mode without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% (factory preset; ensures reliable detection of +3.0V rail collapse) |
| Reset Timeout Period | 150ms minimum (guarantees µP reset hold time after VCC recovery) |
| Operating Supply Voltage | +1.2V to +5.5V (supports ultra-low-voltage operation and wide input range) |
| Supply Current (VCC) | 11µA typical at VCC = 2.8V (enables multi-year battery life in standby) |
| Battery Standby Current | 0.02µA typical at TA = +25°C (minimizes drain on backup cell during long-term storage) |
| Output Type | Active-low push-pull RESET (drives µP reset pin directly without pull-up resistor) |
| Package | SOT23-6 (2.9mm × 1.6mm footprint; compatible with standard pick-and-place and reflow) |
Pinout & Package
MAX6363LUT31-T is housed in a 6-pin SOT23 package with 0.95mm pitch, RoHS-compliant lead-free finish (-T suffix), and operating temperature range of -40°C to +85°C.
| 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; reset asserted when voltage drops below 3.08V |
| BATT | Backup battery input | Secondary source; automatically powers OUT when VCC < VBATT −20mV |
| OUT | Power output | Delivers regulated power to SRAM; sourced from VCC or BATT depending on voltage comparison |
| RESET | Active-low reset output | Push-pull driver asserts low during reset condition; no external pull-up required |
| BATT ON | Battery-active indicator | High-impedance open-drain output pulled high only during battery-backup mode |
Key Features
| Feature | Design Value |
|---|---|
| Battery switchover hysteresis | 40mV (prevents oscillation during slow VCC decay near threshold) |
| Reset assertion at low VCC | Guaranteed RESET/RESET validity down to 1.2V (ensures reset integrity during deep brownout) |
| Transient immunity | Withstands 30µs negative transients 100mV below VTH (reduces false resets in noisy environments) |
| Low quiescent current | 11µA at 2.8V (extends battery life in always-on backup applications) |
| SRAM power continuity | OUT maintains uninterrupted supply during VCC-to-BATT transition (preserves memory contents) |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-powered glucose monitor storing calibration data and recent readings in SRAM during power loss. IC Role / Device Role / Timing Role: Supervisory circuit monitors main Li+ battery (3.6V) and triggers switchover to coin-cell backup before VCC drops below 3.08V. Use Value: BATT ON signal enables firmware to enter low-power retention mode precisely when backup power engages, minimizing SRAM leakage. |
Use Scenario: Remote environmental sensor logging temperature/humidity every 10 seconds using SRAM buffer before SD card write. IC Role / Device Role / Timing Role: Detects AC adapter failure or solar charger interruption and switches SRAM supply to backup supercapacitor. Use Value: 150ms reset timeout ensures µC completes final buffer flush before reset, preventing data corruption. |
| POS Terminals | Smart Meters |
|
Use Scenario: Retail terminal maintaining transaction queue in SRAM during brief mains outage or battery swap. IC Role / Device Role / Timing Role: Provides BATT ON flag to system controller to disable non-critical peripherals and prioritize RAM retention. Use Value: Push-pull RESET eliminates need for external pull-up resistor, reducing BOM count and PCB area in space-constrained designs. |
Use Scenario: Electricity meter preserving tariff schedule and consumption counters in SRAM during grid instability. IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from isolated DC-DC converter; asserts reset if voltage sags below 3.08V for >150ms. Use Value: Factory-trimmed 3.08V threshold eliminates external resistor network, improving long-term accuracy vs. temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6363HUT31-T | Same 3.08V threshold and BATT ON function, but uses active-low open-drain RESET output instead of push-pull | Requires external pull-up resistor on RESET line; suitable where bus-sharing or wired-OR reset is needed | Select when system design mandates open-drain reset for multi-source reset arbitration |
| TPS3808G30DBVR | 3.0V reset threshold (±0.5%), 200ms timeout, no BATT ON output, supports manual reset input | Lacks battery switchover and status indication; intended for single-rail monitoring only | Choose when backup battery management is handled externally and higher threshold accuracy is prioritized |
Compared with MAX6363LUT31-T, MAX6363HUT31-T trades push-pull drive strength for reset bus flexibility, while TPS3808G30DBVR offers tighter threshold tolerance but omits battery-handling functions entirely-making MAX6363LUT31-T uniquely suited for integrated SRAM backup systems.
Availability
MAX6363LUT31-T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, smart meters, and battery-backed memory systems requiring stable component supply across extended production lifecycles.
Supply support for MAX6363LUT31-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 management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6361–MAX6364 family was developed specifically for microprocessor systems needing integrated power monitoring, battery switchover, and reset generation in minimal footprint-targeting portable, battery-critical, and reliability-sensitive applications.
FAQ
What is the exact reset threshold voltage of MAX6363LUT31-T and how tightly is it specified?
The MAX6363LUT31-T has a factory-preset reset threshold of 3.08V, guaranteed over the full -40°C to +85°C temperature range with ±1.5% tolerance. This value is laser-trimmed during production and does not require external components. At +25°C, typical deviation is ±0.5%, and the device maintains monotonic behavior across temperature-critical for predictable brownout response in +3.0V and +3.3V systems.
Does MAX6363LUT31-T support true battery backup for SRAM, and how does the switchover work?
Yes, MAX6363LUT31-T provides true battery backup for SRAM via its dedicated OUT pin and internal MOSFET switch. When VCC falls below the 3.08V threshold *and* VBATT exceeds VCC by at least 20mV, the device disconnects VCC from OUT and connects VBATT instead. The 40mV hysteresis prevents chattering during slow voltage decay. BATT ON goes high to signal this transition, enabling firmware to prepare for backup mode.
What type of RESET output does MAX6363LUT31-T have, and why does it matter for system design?
MAX6363LUT31-T features an active-low push-pull RESET output, meaning it actively drives low during reset and high otherwise-no external pull-up resistor is required. This reduces component count, saves PCB space, and ensures fast, robust reset signaling. Unlike open-drain variants, it avoids contention on shared reset buses and simplifies interface with µP reset inputs that expect clean voltage-level transitions.
Can MAX6363LUT31-T operate from a 1.8V supply, and what happens to RESET functionality at low VCC?
Yes, MAX6363LUT31-T operates from as low as +1.2V on either VCC or VBATT, and its RESET/RESET outputs remain fully functional down to 1.2V. This guarantees reliable reset assertion even during deep brownout conditions where other supervisors may fail. The internal comparators and output drivers are designed for sub-2V operation, making MAX6363LUT31-T suitable for ultra-low-power systems powered by single-cell Li-ion or NiMH batteries.
How does the BATT ON output behave, and what load can it drive?
The BATT ON output of MAX6363LUT31-T is an open-drain, active-high indicator that pulls high only when the device is in battery-backup mode (i.e., VCC < VTH and VBATT > VCC + 20mV). It sinks up to 20mA but is typically used to drive logic inputs or LEDs via external pull-up. Its primary purpose is to provide unambiguous firmware visibility into power-source state-enabling optimized power-state transitions without polling or additional sensors.
MAX6363LUT31-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
MAX6363LUT31-T FAQ
1.How can I place an order for MAX6363LUT31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6363LUT31-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 MAX6363LUT31-T reliable?
The price and inventory of MAX6363LUT31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6363LUT31-T is usually 5 days.
3.What payment methods are accepted for MAX6363LUT31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6363LUT31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6363LUT31-T?
MAX6363LUT31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6363LUT31-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 MAX6363LUT31-T?
For technical support, including MAX6363LUT31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6363LUT31-T requirements.
6.How does Aetrix verify that MAX6363LUT31-T is sourced from the original manufacturer or authorized distributors?
All MAX6363LUT31-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 MAX6363LUT31-T meets industry standards.
7.What is the process for return or replacement of MAX6363LUT31-T?
All MAX6363LUT31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6363LUT31-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 MAX6363LUT31-T part is unused and in its original packaging.
Return procedure for MAX6363LUT31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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