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Analog Devices Inc./Maxim Integrated MAX6363PUT44+T
- Part No.:
- MAX6363PUT44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6363PUT44+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
MAX6363PUT44+T from Maxim Integrated is a SOT23-6, low-power microprocessor supervisory circuit with battery switchover and BATT ON status indicator. It operates from +1.2V supply, features factory-preset 4.4V reset threshold (±2.5% over temperature), 150ms minimum reset timeout, and active-low open-drain RESET output. Used in portable/battery-powered equipment to maintain SRAM backup during brownout.
For engineers reviewing the MAX6363PUT44+T datasheet, MAX6363PUT44+T pinout, MAX6363PUT44+T application, or MAX6363PUT44+T equivalent, key selection criteria include battery-on signaling capability, guaranteed 1.2V operation down to VCC or VBATT, 4.4V precision reset threshold, and SOT23-6 footprint compatibility with industrial temperature range (-40°C to +85°C).
Technical Context
The MAX6363PUT44+T implements a dual-supply monitoring architecture where OUT is sourced from VCC above reset threshold and automatically switches to BATT when VCC falls below 4.4V and remains ≤ VBATT − 20mV. Its internal MOSFET enables battery switchover with on-resistance as low as 2.55Ω at VBATT = 2.25V and 25mA load.
BATT ON output asserts high only in validated battery-backup mode-i.e., when VCC < VTH and VCC < VBATT-and remains ignored during normal VCC operation. Reset assertion is guaranteed for VCC down to 1.2V, with propagation delay under 280µs across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.4V ±2.5% (factory preset; ensures reliable detection of +5V rail brownout) |
| Operating Supply Range | +1.2V to +5.5V (supports single-cell Li+ and low-voltage logic rails) |
| Reset Timeout Period | 150ms minimum (guarantees µP initialization stability after power recovery) |
| Supply Current (VCC) | 11µA typical at 2.8V (enables multi-year battery life in always-on backup mode) |
| Battery Standby Current | 0.02µA typical at +25°C (minimizes drain on coin-cell or Li+ backup sources) |
| VCC-to-OUT On-Resistance | 2.7Ω max at VCC = 2.38V, 25mA (limits voltage drop during SRAM power delivery) |
| Reset Output Type | Active-low open-drain (allows wired-OR configuration with other reset sources) |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.9mm × 1.6mm × 1.1mm height, RoHS-compliant +T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during VCC < 4.4V, MR low, or power failure; requires external pull-up for µP reset input |
| 2 - GND | Ground reference | Common return path for VCC, BATT, and OUT; must be low-impedance for accurate threshold sensing |
| 3 - MR | Manual reset input | Debounced logic input; low pulse ≥1µs triggers reset; internal 20kΩ pull-up to VCC |
| 4 - VCC | Main supply input | Primary power source; monitored for reset assertion; powers internal circuitry and OUT when active |
| 5 - OUT | Power output | Delivers regulated VCC or BATT to SRAM; auto-switches based on VCC/VBATT comparison and reset state |
| 6 - BATT | Backup battery input | Supplies OUT during brownout; switchover enabled only when VCC < VTH and VCC < VBATT − 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATT ON) indicator | Dedicated open-drain output that goes high only in verified battery-backup mode-provides unambiguous system-level status for firmware logging or LED indication |
| Guaranteed 1.2V operation | Full functionality maintained down to 1.2V on either VCC or VBATT-enables use with aging batteries or ultra-low-voltage systems without auxiliary regulators |
| 40mV switchover hysteresis | Prevents oscillation during slow VCC ramp-down by requiring VCC to rise 20mV above VBATT before switching back from battery-eliminates need for external hysteresis circuitry |
| 150ms reset timeout | Internally timed minimum assertion period ensures µP completes power-on reset sequence even with noisy or slowly rising supplies |
| Power-supply transient immunity | Withstands negative-going VCC transients up to 30µs at 100mV overdrive-reduces false resets in electrically noisy environments without added filtering |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG monitor retaining real-time waveform data during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC providing SRAM backup power via BATT and asserting RESET to halt CPU execution until stable VCC returns. Use Value: BATT ON signal enables firmware to trigger emergency save-to-flash before shutdown; 4.4V threshold aligns with nominal 5V rail tolerance. | Use Scenario: Remote environmental sensor node operating on Li+ cell with periodic wake-up and data transmission. IC Role / Device Role / Timing Role: Ensures clean µP reset during cold-start from depleted battery and maintains SRAM integrity during intermittent solar charging gaps. Use Value: 0.02µA battery standby current extends operational lifetime; 1.2V operation supports discharge down to 2.0V cell voltage. |
| Retail POS Terminals | Smart Utility Meters |
Use Scenario: Point-of-sale terminal with nonvolatile memory retention during brief mains interruption. IC Role / Device Role / Timing Role: Switchover controller delivering uninterrupted power to SRAM and generating synchronized reset pulse to prevent corrupted transaction records. Use Value: 2.7Ω VCC-to-OUT on-resistance limits voltage sag under 25mA SRAM load-preserving data integrity during switchover. | Use Scenario: Electricity meter maintaining timekeeping and tariff data during grid outage. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V rail and signals battery-backup activation via BATT ON to metrology ASIC. Use Value: Factory-trimmed 4.4V threshold provides precise margin above 3.3V rail-avoids premature switchover while ensuring fail-safe response to undervoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6363HUT44+T | Same 4.4V reset threshold and BATT ON function, but offered in leaded (non-RoHS) SOT23-6 package | Requires Pb-containing solder process; not suitable for RoHS-compliant production | Select only if legacy assembly line mandates leaded finish and full RoHS compliance is not required |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no battery switchover or BATT ON output; push-pull RESET | Lacks backup power management-requires external diode-OR or PMIC for battery support | Choose when only basic 3.3V supply monitoring is needed and battery backup is handled separately |
Compared with MAX6363PUT44+T, MAX6363HUT44+T shares identical electrical behavior but differs in RoHS compliance and solderability, while TPS3808G33DBVR offers lower cost and higher accuracy for pure 3.3V monitoring but omits critical battery-handling functions required for SRAM retention.
Availability
MAX6363PUT44+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, retail POS terminals, and smart utility meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6363PUT44+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, 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 space-constrained, battery-backed applications.
FAQ
What is the exact reset threshold voltage of MAX6363PUT44+T?
The MAX6363PUT44+T has a factory-preset reset threshold of 4.40V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and appears as "UT44" in the ordering code. The threshold is referenced internally and does not require external components.
Does MAX6363PUT44+T support battery backup for SRAM, and how does it switch?
Yes, MAX6363PUT44+T supports battery backup for SRAM via its OUT pin. It switches to BATT only when two conditions are met simultaneously: VCC falls below the 4.4V reset threshold AND VCC is at least 20mV lower than VBATT. This 40mV hysteresis prevents oscillation during slow VCC decay. The BATT ON output goes high exclusively during this validated backup mode.
Can MAX6363PUT44+T operate with a 1.8V main supply?
Yes, MAX6363PUT44+T operates with VCC as low as +1.2V, making it fully compatible with 1.8V systems. Its reset output remains valid down to 1.2V, and all internal comparators-including the 4.4V threshold detector-function correctly. However, the 4.4V threshold implies it is intended for monitoring higher-voltage rails (e.g., 5V or 3.3V) while powered from a lower auxiliary supply.
What is the purpose of the BATT ON output on MAX6363PUT44+T?
The BATT ON output on MAX6363PUT44+T is an open-drain signal that goes high only when the device is confirmed in battery-backup mode-i.e., when VCC < 4.4V AND VCC < VBATT − 20mV. It is not asserted during normal VCC operation or invalid states. This allows firmware or external logic to detect true backup activation for diagnostics, LED indication, or power-mode transitions.
Is MAX6363PUT44+T pin-compatible with other MAX636x variants?
Yes, all MAX6361–MAX6364 devices share identical SOT23-6 pinout and footprint, including MAX6363PUT44+T. Functionally, pins 1–6 retain consistent roles (RESET, GND, MR, VCC, OUT, BATT) across the family. However, features like WDI (MAX6362), RESET IN (MAX6364), or manual reset (MAX6361) are unused or high-impedance on MAX6363PUT44+T-no external connection is required for those pins.
MAX6363PUT44+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- 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-6
MAX6363PUT44+T FAQ
1.How can I place an order for MAX6363PUT44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6363PUT44+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 MAX6363PUT44+T reliable?
The price and inventory of MAX6363PUT44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6363PUT44+T is usually 5 days.
3.What payment methods are accepted for MAX6363PUT44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6363PUT44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6363PUT44+T?
MAX6363PUT44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6363PUT44+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 MAX6363PUT44+T?
For technical support, including MAX6363PUT44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6363PUT44+T requirements.
6.How does Aetrix verify that MAX6363PUT44+T is sourced from the original manufacturer or authorized distributors?
All MAX6363PUT44+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 MAX6363PUT44+T meets industry standards.
7.What is the process for return or replacement of MAX6363PUT44+T?
All MAX6363PUT44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6363PUT44+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 MAX6363PUT44+T part is unused and in its original packaging.
Return procedure for MAX6363PUT44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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