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Analog Devices Inc./Maxim Integrated MAX6363PUT26+
- Part No.:
- MAX6363PUT26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6363PUT26+.pdf
- Description:
- MAX6363 LOW-POWER MICROPROCESSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,096
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Product details
Overview
MAX6363PUT26+ from Maxim Integrated is a SOT23-6 battery-backed microprocessor supervisory circuit with factory-preset 2.63V reset threshold, battery-on (BATT ON) output indicator, and active-low open-drain RESET output. It monitors VCC supply voltage down to +1.2V, provides 150ms minimum reset timeout, and enables seamless switchover to backup battery when VCC falls below VTH and VBATT > VCC. Used in portable instrumentation and POS terminals requiring reliable SRAM retention during brownout.
For engineers reviewing the MAX6363PUT26+ datasheet, MAX6363PUT26+ pinout, MAX6363PUT26+ application, or MAX6363PUT26+ equivalent, key selection criteria include its 2.63V precision reset threshold, BATT ON status signaling, battery-switchover hysteresis (40mV), guaranteed RESET/RESET operation down to 1.2V, and compatibility with 3.3V/2.5V µP systems.
Technical Context
The MAX6363PUT26+ implements a dual-supply monitoring architecture where OUT is sourced from VCC above reset threshold and automatically switches to VBATT when VCC drops below 2.63V and VBATT exceeds VCC by ≥20mV. Its internal MOSFET-based switchover path supports up to 25mA load at 2.25V VBATT with ≤2.7Ω on-resistance.
Unlike the MAX6361 (manual reset) or MAX6362 (watchdog), the MAX6363 variant integrates a dedicated BATT ON output that asserts high only in validated battery-backup mode-confirmed by simultaneous VCC < VTH and VCC < VBATT conditions per Table 1. Reset assertion is synchronized to VCC falling edge with 20–280ms propagation delay depending on overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory preset, ±1.5% over -40°C to +85°C) - sets precise brownout detection point for 2.5V/3.3V systems |
| Reset Timeout Period | 150ms (minimum) - ensures µP remains held in reset long enough for stable power recovery |
| Operating Supply Range | +1.2V to +5.5V (VCC or VBATT) - supports single-cell Li+ and low-voltage logic rails |
| Battery Switchover Hysteresis | 40mV (VBATT − VCC = 20mV entry, −20mV exit) - prevents oscillation during slow VCC decay |
| Supply Current (VCC) | 11µA (typ at VCC = 2.8V) - enables multi-year battery life in always-on backup mode |
| BATT ON Output Logic | Active-high open-drain - signals valid battery-backup state to host controller or LED driver |
| VCC-to-OUT On-Resistance | 2.7Ω (max at VCC = 2.38V, IOUT = 25mA) - minimizes voltage drop during primary supply operation |
Pinout & Package
Package: 6-pin SOT23 (U6-1, outline 21-0058), RoHS-compliant lead-free, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, remains low ≥150ms after VCC recovery; requires external pull-up |
| 2: GND | Ground reference | Common return for VCC, VBATT, and all internal comparators; must be low-impedance |
| 3: MR | Manual reset input | Unused in MAX6363; internally pulled up to VCC - leave unconnected or tie to VCC |
| 4: VCC | Main supply input | Primary power source; reset asserted when VCC < 2.63V; powers internal circuitry and OUT path |
| 5: OUT | Switched output | Sources from VCC if VCC > VTH, else from greater of VCC or VBATT; drives SRAM VDD or real-time clock |
| 6: BATT | Backup battery input | Connects to Li+ or coin cell; activates switchover when VBATT > VCC + 20mV; draws ≤0.05µA standby current |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATT ON) indicator | Dedicated open-drain output that goes high only when both VCC < VTH and VBATT > VCC - eliminates false backup assertions |
| Precision reset threshold | 2.63V ±1.5% over full temperature range - enables accurate monitoring of 2.5V rails without external resistors |
| Low-power operation | 11µA typical ICC at 2.8V - extends battery life in always-connected backup applications |
| Transient immunity | Withstands 30µs negative VCC glitches down to 100mV below VTH - suppresses noise-induced resets |
| Guaranteed 1.2V operation | RESET/RESET functional down to VCC = 1.2V - supports ultra-low-voltage µP startup sequences |
Applications
| Portable Medical Monitors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform capture powered by rechargeable Li+ battery with AC adapter fallback. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers BATT ON to enable low-power SRAM retention during AC loss. Use Value: Prevents data corruption by holding µP in reset until backup power stabilizes, while BATT ON signal disables non-essential peripherals. |
Use Scenario: Remote sensor node logging temperature/humidity to SPI flash, operating on primary 3.3V supply with coin-cell backup. IC Role / Device Role / Timing Role: Monitors 3.3V rail; asserts RESET to halt write operations during brownout; switches OUT to battery to preserve flash controller state. Use Value: Ensures flash write integrity via 150ms reset hold time and eliminates need for external power-fail interrupt generation. |
| POS Terminals | Smart Meters |
Use Scenario: Retail terminal with 5V DC input and CR2032 backup, requiring tamper-proof transaction logging. IC Role / Device Role / Timing Role: Detects 5V rail collapse; uses BATT ON to activate secure EEPROM write-enable path during power failure. Use Value: Guarantees last-transaction commit before shutdown using battery-backed SRAM and hardware-enforced reset timing. |
Use Scenario: Electricity meter with isolated MCU and metrology ASIC, powered by mains-derived 3.3V with supercapacitor backup. IC Role / Device Role / Timing Role: Supervises 3.3V supply; asserts RESET to freeze energy accumulation counters; switches OUT to supercap to maintain RTC and memory. Use Value: Maintains timekeeping accuracy and billing data continuity during grid outages via sub-1µA battery standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6363HUT26+ | Same 2.63V threshold and BATT ON function, but offered in leaded (non-RoHS) SOT23-6 package | Identical electrical behavior; differs only in Pb content and JEDEC marking code (HUT vs PUT) | Select MAX6363HUT26+ only if legacy leaded assembly is required; otherwise MAX6363PUT26+ preferred for RoHS compliance |
| MAX6363LUT26+ | Same functionality and threshold, but rated for -40°C to +125°C extended temperature range | Valid for automotive under-hood or industrial high-temp environments where standard grade fails | Choose MAX6363LUT26+ when ambient exceeds +85°C; otherwise MAX6363PUT26+ meets commercial-grade requirements |
Compared with MAX6363HUT26+, the MAX6363PUT26+ offers RoHS-compliant packaging without performance trade-offs; versus MAX6363LUT26+, it reduces cost and lead time for applications operating strictly within -40°C to +85°C.
Availability
MAX6363PUT26+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, POS terminals, smart meters, and battery-backed SRAM retention systems requiring stable component supply across production lifecycles.
Supply support for MAX6363PUT26+ 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, computing, and communications markets.
The MAX6361–MAX6364 family was developed specifically for µP systems needing integrated power supervision, battery switchover, and status indication in space-constrained portable equipment.
FAQ
What is the exact reset threshold voltage of the MAX6363PUT26+?
The MAX6363PUT26+ has a factory-preset reset threshold of 2.63V, with guaranteed tolerance of ±1.5% over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and does not require external resistor networks. The threshold is specified in the Electrical Characteristics table under "Reset Threshold" for suffix "UT26", confirming 2.55V (min), 2.63V (typ), and 2.70V (max) at TA = +25°C.
Does the MAX6363PUT26+ require external components to operate?
No, the MAX6363PUT26+ operates autonomously with no external components required for basic supervision. A 0.1µF bypass capacitor on VCC is recommended for transient immunity, and an external pull-up resistor is needed on the open-drain RESET output. The BATT ON output is open-drain and also requires a pull-up. Unlike the MAX6364 variant, the MAX6363PUT26+ has no RESET IN pin and does not need external resistor dividers.
How does the BATT ON output behave during power transitions?
The BATT ON output of the MAX6363PUT26+ goes high only when two conditions are simultaneously met: VCC has fallen below 2.63V AND VBATT exceeds VCC by at least 20mV. It remains high until VCC rises 20mV above VBATT. This 40mV hysteresis prevents chatter during slow VCC recovery. During normal operation (VCC > VTH), BATT ON is low - confirmed in Table 1 and Pin Description section.
Can the MAX6363PUT26+ monitor a 5V supply?
No - the MAX6363PUT26+ is configured for 2.63V reset threshold and is intended for 2.5V or 3.3V systems. For 5V supply monitoring, select MAX6363PUT46+ (4.63V threshold) or MAX6363PUT44+ (4.38V). The 2.63V version would assert reset continuously on a 5V rail. Threshold selection is fixed per part number; no field adjustment is possible on the MAX6363PUT26+.
What is the maximum load current supported on the OUT pin of the MAX6363PUT26+?
The OUT pin of the MAX6363PUT26+ supports up to 25mA when powered from VBATT at 2.25V (RON ≤ 2.7Ω), and up to 150mA when powered from VCC at 4.75V (RON ≤ 2.75Ω). These values are specified in the Electrical Characteristics table under "VCC to OUT On-Resistance" and "Battery-Switchover Threshold". Exceeding these limits risks excessive voltage drop or thermal shutdown.
MAX6363PUT26+ 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:
- 2.63V
- 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
MAX6363PUT26+ FAQ
1.How can I place an order for MAX6363PUT26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6363PUT26+ 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 MAX6363PUT26+ reliable?
The price and inventory of MAX6363PUT26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6363PUT26+ is usually 5 days.
3.What payment methods are accepted for MAX6363PUT26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6363PUT26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6363PUT26+?
MAX6363PUT26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6363PUT26+ 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 MAX6363PUT26+?
For technical support, including MAX6363PUT26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6363PUT26+ requirements.
6.How does Aetrix verify that MAX6363PUT26+ is sourced from the original manufacturer or authorized distributors?
All MAX6363PUT26+ 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 MAX6363PUT26+ meets industry standards.
7.What is the process for return or replacement of MAX6363PUT26+?
All MAX6363PUT26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6363PUT26+, 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 MAX6363PUT26+ part is unused and in its original packaging.
Return procedure for MAX6363PUT26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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