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Analog Devices Inc./Maxim Integrated MAX6363HUT44+T
- Part No.:
- MAX6363HUT44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6363HUT44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,417
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Product details
Overview
MAX6363HUT44+T from Maxim Integrated is a SOT23-6 battery-backup supervisory circuit designed for microprocessor systems requiring reliable power monitoring and seamless switchover to backup power. It features a factory-preset 4.40V reset threshold, active-low open-drain reset output, and dedicated BATT ON indicator output. The device operates from +1.2V supply, guarantees RESET/RESET validity down to 1.2V, and delivers 150ms minimum reset timeout - used in portable instrumentation and POS terminals where SRAM retention during brownout is critical.
For engineers reviewing the MAX6363HUT44+T datasheet, MAX6363HUT44+T pinout, MAX6363HUT44+T application, or MAX6363HUT44+T equivalent, key selection criteria include its 4.40V precision reset threshold, battery-on status signaling capability, guaranteed 1.2V operation, 150ms reset timeout, and SOT23-6 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6363HUT44+T implements a dual-supply supervision architecture with independent VCC and VBATT inputs, enabling automatic switchover to backup battery when VCC falls below 4.40V and VBATT exceeds VCC by ≥20mV. Its internal MOSFET switch connects BATT to OUT with on-resistance as low as 2.7Ω (at VBATT = 2.8V, TA = +25°C), while the BATT ON output asserts high only in verified battery-backup mode.
Unlike general-purpose supervisors, this variant excludes manual reset (MR), watchdog input (WDI), or adjustable reset-in (RESET IN) - it is functionally optimized solely for battery-on indication and fixed-threshold reset generation. All timing and voltage thresholds are factory-trimmed and temperature-compensated across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40V ±1.5% - precisely set at factory for stable +5V rail monitoring without external resistors |
| Operating Voltage Range | +1.2V to +5.5V - supports ultra-low-power startup and operation down to single-cell Li-ion or coin-cell levels |
| Reset Timeout Period | 150ms minimum - ensures µP reset assertion long enough for full power stabilization after VCC recovery |
| Supply Current (VCC) | 11µA typical at VCC = 2.8V - enables multi-year battery life in always-on backup applications |
| Battery Standby Current | 0.02µA typical at TA = +25°C - minimizes drain on backup source when VCC is active |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and flexible pull-up voltage selection |
| BATT ON Output | Dedicated logic-high indicator during battery-backup mode - provides direct system-level status for firmware or LED control |
Pinout & Package
Package: 6-pin SOT23 (U6-1), RoHS-compliant, -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 recovers above 4.40V |
| 2 - GND | Ground reference | Common return path for VCC, BATT, and all internal circuitry; must be low-impedance |
| 3 - OUT | Power output node | Supplies SRAM or real-time clock from VCC when valid; switches to BATT when VCC < 4.40V and VBATT > VCC + 20mV |
| 4 - VCC | Main supply input | Primary power source; reset asserted when falling below 4.40V; powers internal circuitry and drives OUT |
| 5 - BATT | Backup battery input | Provides backup power to OUT during VCC failure; must exceed VCC by ≥20mV to enable switchover |
| 6 - BATT ON | Battery-active status output | Open-drain output pulled high externally; goes low when VCC is active, high only during confirmed battery-backup mode |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Indicator Output | Provides unambiguous, hardware-verified signal that backup power is actively supplying OUT - eliminates firmware polling or voltage measurement uncertainty |
| Factory-Preset 4.40V Threshold | Eliminates external resistor network and associated drift/error; achieves ±1.5% accuracy over temperature without calibration |
| Guaranteed 1.2V Operation | Ensures functional reset assertion even during deep brownout or single-cell battery discharge - critical for data retention integrity |
| 150ms Minimum Reset Timeout | Meets JEDEC JESD88 requirements for µP initialization stability; prevents premature release before power rail settling |
| SOT23-6 Footprint | Enables integration into space-constrained portable designs (e.g., handheld meters, medical sensors) without layout redesign |
Applications
| Portable Data Loggers | Industrial HMI Terminals |
|---|---|
Use Scenario: Continuous environmental sensor logging powered by primary DC supply with coin-cell backup during mains outage. IC Role / Device Role / Timing Role: Supervises main 3.3V rail, triggers reset on undervoltage, switches SRAM to backup power, and signals battery activation via BATT ON. Use Value: Prevents SRAM corruption during 10–30s power interruptions; BATT ON enables firmware to enter low-power logging mode immediately upon switchover. | Use Scenario: Factory-floor human-machine interface with nonvolatile memory retaining configuration and runtime state. IC Role / Device Role / Timing Role: Monitors 5.0V system rail; asserts RESET to halt processor during brownout; maintains SRAM power via OUT; BATT ON informs UI controller of backup engagement. Use Value: Guarantees deterministic restart after voltage sag; eliminates need for software-based voltage monitoring and reduces BOM count by replacing discrete supervisor + comparator + FET solution. |
| Medical Point-of-Care Devices | Smart Energy Meters |
Use Scenario: Battery-backed glucose monitor storing calibration and usage history across power cycles. IC Role / Device Role / Timing Role: Provides fail-safe reset during lithium battery transition; ensures SRAM remains powered during AC loss; BATT ON activates low-power display backlight. Use Value: Meets IEC 62304 Class B safety requirements for power-fail response; 0.02µA battery standby current extends 3V coin-cell life to >5 years in sleep mode. | Use Scenario: Utility meter with supercapacitor-assisted backup maintaining timekeeping and tariff data during grid dropout. IC Role / Device Role / Timing Role: Supervises 3.3V RTC supply; initiates controlled shutdown sequence upon 4.40V threshold breach; BATT ON enables secure flash write lockout during backup mode. Use Value: Eliminates risk of partial writes corrupting tariff tables; 150ms reset timeout aligns with EN 13757-3 secure storage timing windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6363HUT46+T | Higher reset threshold (4.63V vs. 4.40V); identical pinout, package, and BATT ON functionality | Targeted at +5V systems with tighter tolerance margins or higher noise immunity requirements | Select when system nominal VCC is 5.0V ±5% and transient rejection above 4.6V is required |
| TPS3808G33DBVR | 3.3V fixed reset threshold; no BATT ON output; requires external battery switchover FET; SOT23-6 | Lacks integrated battery management - demands additional discrete components for backup power control | Choose only if BATT ON signaling is unnecessary and design already includes external switchover circuitry |
Compared with MAX6363HUT44+T, the MAX6363HUT46+T offers higher threshold headroom for noisy 5V rails but reduces margin for early brownout detection; the TPS3808G33DBVR lacks battery-on indication and requires added complexity for backup power routing - making MAX6363HUT44+T optimal for integrated, space- and component-count-sensitive battery-backup designs.
Availability
MAX6363HUT44+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial HMI terminals, medical point-of-care devices, smart energy meters, and battery-backed data loggers requiring stable component supply across extended product lifecycles.
Supply support for MAX6363HUT44+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX6361–MAX6364 family was engineered specifically for microprocessor systems needing compact, low-power supervision with integrated battery switchover - eliminating discrete solutions while guaranteeing robust operation across wide temperature and voltage ranges.
FAQ
What is the exact reset threshold voltage of the MAX6363HUT44+T?
The MAX6363HUT44+T has a factory-trimmed reset threshold of 4.40V, with guaranteed tolerance of ±1.5% over the full –40°C to +85°C temperature range. This value is specified in the Electrical Characteristics table under "Reset Threshold" (VTH) for suffix "44", and is validated per Maxim's production test flow at +25°C and temperature extremes. The MAX6363HUT44+T does not support user adjustment of this threshold.
Does the MAX6363HUT44+T provide battery switchover functionality?
Yes, the MAX6363HUT44+T integrates automatic battery switchover: when VCC falls below 4.40V and VBATT exceeds VCC by at least 20mV, the internal MOSFET connects the BATT input to the OUT pin to maintain power to downstream circuitry (e.g., SRAM). Switchover hysteresis prevents oscillation, and the BATT ON output signals active battery mode. The MAX6363HUT44+T does not require external FETs or control logic for this function.
What is the purpose of the BATT ON pin on the MAX6363HUT44+T?
The BATT ON pin on the MAX6363HUT44+T is an open-drain output that asserts high (when pulled up externally) exclusively during confirmed battery-backup operation - i.e., when VCC < 4.40V and VBATT > VCC + 20mV. It provides hardware-level verification of backup power engagement, enabling firmware to trigger low-power modes or illuminate status LEDs without relying on voltage measurements. This signal is not present on other MAX636x variants like MAX6361 or MAX6362.
Can the MAX6363HUT44+T operate with a 1.2V supply?
Yes, the MAX6363HUT44+T is fully specified to operate from VCC or VBATT as low as +1.2V. Its internal circuitry, including the reset comparator and BATT ON driver, remains functional and guaranteed across the entire 1.2V–5.5V range. This capability ensures reliable reset assertion and battery switchover even during deep discharge of single-cell Li-ion or alkaline sources - a key differentiator versus many competing supervisors rated only down to 1.8V.
Is the MAX6363HUT44+T pin-compatible with other members of the MAX6361–MAX6364 family?
Yes, all MAX6361–MAX6364 devices share identical SOT23-6 pinouts and footprints, including the MAX6363HUT44+T. Pin 1 (RESET), Pin 2 (GND), Pin 3 (OUT), Pin 4 (VCC), Pin 5 (BATT), and Pin 6 (BATT ON) retain consistent functions across the family. However, unused pins (e.g., MR on MAX6361, WDI on MAX6362, RESET IN on MAX6364) are internally disconnected or high-impedance in the MAX6363HUT44+T - no external termination is required.
MAX6363HUT44+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:
- 4.38V
- 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
MAX6363HUT44+T FAQ
1.How can I place an order for MAX6363HUT44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6363HUT44+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 MAX6363HUT44+T reliable?
The price and inventory of MAX6363HUT44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6363HUT44+T is usually 5 days.
3.What payment methods are accepted for MAX6363HUT44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6363HUT44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6363HUT44+T?
MAX6363HUT44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6363HUT44+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 MAX6363HUT44+T?
For technical support, including MAX6363HUT44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6363HUT44+T requirements.
6.How does Aetrix verify that MAX6363HUT44+T is sourced from the original manufacturer or authorized distributors?
All MAX6363HUT44+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 MAX6363HUT44+T meets industry standards.
7.What is the process for return or replacement of MAX6363HUT44+T?
All MAX6363HUT44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6363HUT44+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 MAX6363HUT44+T part is unused and in its original packaging.
Return procedure for MAX6363HUT44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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