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Analog Devices Inc./Maxim Integrated MAX6363HUT26-T
- Part No.:
- MAX6363HUT26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6363HUT26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,932
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Product details
Overview
MAX6363HUT26-T from Maxim Integrated is a SOT23-6 supervisory IC for microprocessor power monitoring and battery switchover, featuring factory-preset 2.63V reset threshold, active-low open-drain RESET output, battery-on (BATT ON) indicator, and operation down to +1.2V supply. It provides 150ms minimum reset timeout, <1µA battery standby current at 2.8V, and automatic VCC-to-battery switchover when VCC falls below VBATT by 20mV - used in portable SRAM backup systems.
For engineers reviewing the MAX6363HUT26-T datasheet, MAX6363HUT26-T pinout, MAX6363HUT26-T application, or MAX6363HUT26-T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V supply, BATT ON logic-high indication during backup mode, precise 2.63V ±1.5% threshold over -40°C to +85°C, and SOT23-6 footprint compatibility with other MAX636x family members.
Technical Context
The MAX6363HUT26-T implements a dual-supply supervisory architecture with internal comparator-based reset generation triggered by VCC falling below 2.63V, plus dedicated battery switchover control using a MOSFET switch between BATT and OUT. Its BATT ON output is asserted high only when VCC is disconnected from OUT and VBATT powers OUT - confirming true battery-backup mode.
It integrates no watchdog timer or manual reset input; instead, it delivers fixed-threshold supervision with battery status signaling. The device guarantees RESET/RESET validity down to 1.2V on either VCC or VBATT, supports up to 150mA VCC-sourced output current, and maintains <0.4V VOL at 3.2mA sink load - enabling direct interface with µP reset inputs across voltage domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% (factory preset); ensures reliable reset assertion for +2.5V systems with margin against brownout |
| Reset Timeout Period | 150ms minimum; guarantees µP remains held in reset long enough for stable power recovery |
| Supply Voltage Range | +1.2V to +5.5V on VCC or VBATT; enables operation directly from single-cell Li+ or NiMH batteries |
| Battery Standby Current | 0.02µA typical at +25°C; minimizes drain on backup battery during extended storage |
| VCC-to-OUT On-Resistance | 2.7Ω typical at VCC = 2.38V, IOUT = 25mA; limits voltage drop and self-heating during SRAM backup |
| BATT-to-OUT On-Resistance | 2.9Ω typical at VBATT = 2.25V, IOUT = 5mA; ensures low-loss battery-to-load connection during switchover |
| RESET Output Type | Active-low open-drain; allows wired-OR configuration and level-shifting with external pull-up |
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, power-up, or brownout; requires external pull-up for µP interface |
| 2 - GND | Ground reference | Common return path for VCC, VBATT, and all internal circuitry; must be low-impedance |
| 3 - MR | Manual reset input | Not functional on MAX6363HUT26-T; unused pin - leave unconnected or tie to VCC |
| 4 - VCC | Main supply input | Primary power source; powers internal circuitry and supplies OUT until switchover occurs |
| 5 - OUT | Power output | Delivers regulated VCC or VBATT to load (e.g., SRAM); switches automatically based on VCC/VBATT comparison |
| 6 - BATT | Backup battery input | Provides backup power when VCC drops; enables BATT ON assertion and switchover via internal MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATT ON) output | Logic-high signal confirms active battery-backup mode - eliminates need for external voltage monitoring |
| Factory-trimmed 2.63V reset threshold | ±1.5% accuracy over temperature; removes external resistor network required for adjustable thresholds |
| 150ms minimum reset timeout | Guaranteed hold time prevents premature µP release during unstable power recovery |
| Sub-1µA battery standby current | Enables >10-year shelf life for coin-cell-backed systems without compromising switchover speed |
| VCC/VBATT switchover hysteresis | 40mV (20mV turn-on + 20mV turn-off); prevents oscillation during slow VCC ramp-down or noisy conditions |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG sensor continuously records vital signs and retains RAM data during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC monitors main supply, asserts RESET to halt processor, and switches SRAM to coin-cell backup while asserting BATT ON to trigger low-power firmware state. Use Value: Prevents data corruption during brownout and enables instant resume after power restoration - verified with 2.63V threshold matching 2.5V rail tolerance. | Use Scenario: Ruggedized environmental logger operates in remote locations with intermittent solar charging and Li-ion backup. IC Role / Device Role / Timing Role: Detects VCC collapse below 2.63V, holds µC in reset, routes backup power to nonvolatile SRAM, and signals BATT ON to disable peripherals and enter deep sleep. Use Value: Achieves <0.02µA battery drain in backup mode - extending 200mAh cell life to >15 years in storage. |
| POS Terminal Memory Backup | Smart Utility Meters |
Use Scenario: Retail point-of-sale terminal uses SRAM for transaction buffering and must retain last sale during brief grid outage. IC Role / Device Role / Timing Role: Provides 150ms reset hold and seamless VCC-to-BATT switchover to maintain SRAM voltage above retention threshold (typically 1.2V). Use Value: Guarantees RESET remains valid down to 1.2V on either supply - ensuring reset integrity even as backup cell discharges to endpoint. | Use Scenario: Electricity meter retains tamper logs and billing data during mains failure using supercapacitor-assisted backup. IC Role / Device Role / Timing Role: Monitors 3.3V system rail; triggers BATT ON to initiate capacitor discharge management and asserts RESET to freeze metering registers. Use Value: 2.7Ω VCC-to-OUT RON limits IR drop to <68mV at 25mA - preserving SRAM write margin during switchover transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory-with-battery-indicator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6363HUT29-T | 2.93V reset threshold (vs. 2.63V); otherwise identical pinout, timing, and BATT ON function | Suitable for +3.0V or +3.3V systems requiring higher trip point; not interchangeable without board-level voltage validation | Select when system nominal rail is ≥2.9V and 2.63V threshold risks false triggering during ripple |
| TPS3808G125DBVR | 2.5V threshold, push-pull RESET, no BATT ON output; requires external circuitry for battery status indication | Lacks integrated battery switchover confirmation; demands additional GPIO or comparator for backup-mode detection | Choose only if BATT ON signal is unnecessary and push-pull reset simplifies layout |
Compared with MAX6363HUT26-T, the MAX6363HUT29-T offers higher reset threshold for improved noise immunity on 3.0V rails, while the TPS3808G125DBVR trades BATT ON functionality for lower quiescent current (1.1µA vs. 10µA) but adds design complexity to replicate battery-status signaling.
Availability
MAX6363HUT26-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, POS terminal memory backup, and smart utility meters requiring stable component supply with long-term lifecycle support.
Supply support for MAX6363HUT26-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 - emphasizing reliability, low power, and integration.
The MAX6361–MAX6364 product line targets battery-backed microprocessor systems requiring compact, low-quiescent supervision with automatic power-source switchover and status signaling - optimized for space-constrained portable and industrial equipment.
FAQ
What is the exact reset threshold voltage of the MAX6363HUT26-T?
The MAX6363HUT26-T has a factory-trimmed reset threshold of 2.63V, with guaranteed tolerance of ±1.5% over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and does not require external components. The MAX6363HUT26-T datasheet specifies 2.55V (min) and 2.70V (max) at +25°C, tightening to 2.59V–2.67V across temperature - making it suitable for 2.5V rail supervision with margin.
Does the MAX6363HUT26-T provide a battery-on (BATT ON) output signal?
Yes, the MAX6363HUT26-T features a dedicated BATT ON output (Pin 3) that goes logic-high only when the device is actively supplying OUT from the backup battery (i.e., VCC is below VBATT and below the reset threshold). This signal is electrically isolated from RESET and provides unambiguous confirmation of battery-backup mode - eliminating need for external comparators or firmware polling. The MAX6363HUT26-T BATT ON output drives up to 20mA and remains valid down to 1.2V VBATT.
Can the MAX6363HUT26-T operate with a 1.8V main supply?
Yes, the MAX6363HUT26-T operates from VCC as low as +1.2V, so it fully supports 1.8V systems. However, its 2.63V reset threshold means it will assert RESET whenever VCC falls below that level - making it unsuitable as a *supervisor for 1.8V rails*. Instead, it is intended for use with higher-voltage rails (e.g., 2.5V, 3.0V, 3.3V) where 2.63V provides appropriate undervoltage detection. The MAX6363HUT26-T can still be powered from 1.8V for auxiliary functions if VBATT is present, but RESET assertion will occur immediately.
What is the function of Pin 3 (MR) on the MAX6363HUT26-T?
Pin 3 on the MAX6363HUT26-T is the Manual Reset (MR) input, inherited from the MAX6361 variant. However, MR is *not functional* in the MAX6363HUT26-T - it is a no-connect pin. The device ignores MR state and does not generate reset pulses based on MR transitions. Per the datasheet, MR should be left unconnected or tied to VCC; driving it low has no effect. This differs from the MAX6361HUT26-T, where MR is fully operational. The MAX6363HUT26-T relies solely on VCC monitoring and battery switchover for reset generation.
How does the MAX6363HUT26-T handle power switchover between VCC and BATT?
The MAX6363HUT26-T performs automatic switchover using an internal MOSFET: when VCC falls below both the 2.63V reset threshold *and* VBATT minus 20mV, it disconnects VCC from OUT and connects VBATT to OUT. Switchover hysteresis is 40mV (20mV turn-on, 20mV turn-off) to prevent chatter. The BATT ON output goes high during this state. When VCC rises above VBATT + 20mV, the device reverts to VCC sourcing. The MAX6363HUT26-T guarantees switchover integrity down to 1.2V on either supply rail.
MAX6363HUT26-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:
- 2.63V
- 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
MAX6363HUT26-T FAQ
1.How can I place an order for MAX6363HUT26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6363HUT26-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 MAX6363HUT26-T reliable?
The price and inventory of MAX6363HUT26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6363HUT26-T is usually 5 days.
3.What payment methods are accepted for MAX6363HUT26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6363HUT26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6363HUT26-T?
MAX6363HUT26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6363HUT26-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 MAX6363HUT26-T?
For technical support, including MAX6363HUT26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6363HUT26-T requirements.
6.How does Aetrix verify that MAX6363HUT26-T is sourced from the original manufacturer or authorized distributors?
All MAX6363HUT26-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 MAX6363HUT26-T meets industry standards.
7.What is the process for return or replacement of MAX6363HUT26-T?
All MAX6363HUT26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6363HUT26-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 MAX6363HUT26-T part is unused and in its original packaging.
Return procedure for MAX6363HUT26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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