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Analog Devices Inc./Maxim Integrated MAX6364PUT26+T
- Part No.:
- MAX6364PUT26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6364PUT26+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,682
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Product details
Overview
MAX6364PUT26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary user-adjustable reset input, battery switchover, and power-failure warning functionality. It operates from +1.2V supply, features factory-preset 2.63V reset threshold, 150ms minimum reset timeout, and active-low open-drain reset output in a 6-pin SOT23 package. It is used in portable/battery-powered equipment to maintain SRAM integrity during brownout.
For engineers reviewing the MAX6364PUT26+T datasheet, MAX6364PUT26+T pinout, MAX6364PUT26+T application, or MAX6364PUT26+T equivalent, key selection criteria include its 2.63V reset threshold accuracy, 1.235V adjustable RESET IN comparator reference, battery switchover hysteresis (40mV), guaranteed reset assertion down to 1.2V VCC/VBATT, and SOT23-6 footprint compatibility across the MAX6361–MAX6364 family.
Technical Context
The MAX6364PUT26+T implements a precision voltage-monitoring architecture with dual-supply operation: VCC powers the device and feeds OUT during normal operation, while VBATT takes over OUT when VCC falls below the 2.63V threshold and remains ≤ VBATT − 20mV. Its internal 1.235V bandgap reference enables external resistor-divider programming of secondary supply monitoring via the RESET IN pin.
It integrates a battery switchover MOSFET with on-resistance dependent on VBATT (e.g., 2.7Ω at VBATT = 2.8V, IOUT = 10mA), supports backup current as low as 0.02µA at +25°C, and provides glitch-immune reset assertion with 100ns noise immunity on MR/RESET IN inputs. Reset propagation delay is 35µs typical for VCC falling at 10V/ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% (factory preset; ensures reliable detection of 2.5V system rail brownout) |
| RESET IN Reference | 1.235V ±0.05V (enables accurate secondary supply monitoring using external R1/R2 divider) |
| Reset Timeout Period | 150ms minimum (guarantees µP initialization completes before release) |
| Supply Voltage Range | +1.2V to +5.5V (supports single-cell Li+ and multi-cell alkaline battery systems) |
| Quiescent Current | 11µA at VCC = 2.8V (enables >10-year battery life in always-on backup mode) |
| Battery Standby Current | 0.02µA at +25°C (minimizes drain on backup cell during long-term storage) |
| VCC to OUT On-Resistance | 2.7Ω at VCC = 2.38V, IOUT = 25mA (limits voltage drop under SRAM load) |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.9mm × 1.6mm × 1.1mm height, RoHS-compliant lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Pulled low during reset assertion; requires external pull-up; compatible with 1.2V–5.5V µP reset inputs |
| 2: GND | Ground reference | Common return path for VCC, VBATT, and all internal circuitry; must be low-impedance |
| 3: RESET IN | Auxiliary reset input | Compares external voltage to 1.235V reference; asserts reset if input < 1.235V ±0.05V |
| 4: VCC | Main supply input | Primary power source; powers internal logic and drives OUT until brownout condition occurs |
| 5: OUT | Power output | Switches between VCC and VBATT; supplies SRAM or real-time clock during power failure |
| 6: BATT | Backup battery input | Connects to lithium coin cell or rechargeable battery; activates switchover when VCC < VBATT − 20mV |
Key Features
| Feature | Design Value |
|---|---|
| User-adjustable RESET IN | Enables monitoring of secondary supplies (e.g., 5V analog rail) via external resistor divider referenced to 1.235V internal bandgap |
| Battery switchover hysteresis | 40mV (VBATT − VCC ≥ 20mV to engage; VCC − VBATT ≥ 20mV to disengage) prevents oscillation during slow VCC recovery |
| Low-voltage operation | Guaranteed reset assertion and functional operation down to 1.2V VCC or VBATT enables use with single-cell Li+ (2.5–4.2V) and NiMH (0.9–1.4V/cell) batteries |
| Transient immunity | Withstands negative-going VCC transients up to 30µs duration when 100mV below threshold-eliminates false resets in noisy environments |
| SOT23-6 footprint | Standardized 6-pin package shared across MAX6361–MAX6364 family allows design reuse and simplified inventory management |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous ECG monitor powered by CR2032 coin cell with main 3.3V LDO supply. IC Role / Device Role / Timing Role: Supervises 3.3V rail and triggers switchover to backup battery upon brownout; holds SRAM contents during power loss. Use Value: Prevents loss of critical patient waveform data during battery replacement or LDO dropout; 0.02µA standby current extends CR2032 life beyond 5 years. | Use Scenario: Remote environmental sensor node logging temperature/humidity to SPI FRAM, powered by solar-charged Li-ion. IC Role / Device Role / Timing Role: Monitors main 3.6V supply and secondary 5.0V analog sensor rail via RESET IN; asserts reset if either fails. Use Value: Ensures clean µC restart and memory preservation during intermittent solar charging gaps; 1.235V reference enables precise 4.60V secondary threshold setting (R1=273kΩ, R2=100kΩ). |
| Point-of-Sale Terminals | Smart Meters |
Use Scenario: Battery-backed transaction terminal with EEPROM-based configuration storage. IC Role / Device Role / Timing Role: Provides 150ms reset pulse to guarantee EEPROM write completion before power loss. Use Value: Eliminates corrupted configuration after AC outage; 2.63V threshold matches 2.5V logic rail tolerance, avoiding premature reset assertion. | Use Scenario: Electricity meter with RTC and nonvolatile memory, operating from mains with supercapacitor backup. IC Role / Device Role / Timing Role: Switches RTC power from mains to supercapacitor when input drops below 2.63V; monitors capacitor voltage decay via RESET IN. Use Value: Maintains accurate timekeeping for >120 hours during blackout; 1.235V reference allows direct supercap voltage monitoring without external op-amp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6364HUT26+T | Same 2.63V reset threshold and RESET IN function, but active-high open-drain RESET output | Requires µP with active-high reset input; incompatible with standard active-low reset designs | Select only if host µP reset pin is active-high and external inverter is undesirable |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no battery switchover or RESET IN pin; 350ms timeout; 1.4µA quiescent current | Lacks backup power management and auxiliary monitoring; suited for simple 3.3V-only systems without battery backup | Choose when cost sensitivity outweighs need for battery switchover and secondary supply monitoring |
Compared with MAX6364PUT26+T, MAX6364HUT26+T offers identical supervision accuracy and battery control but requires redesign of reset signal routing, while TPS3808G33DBVR reduces BOM count in non-backup applications but cannot preserve SRAM during power loss or monitor auxiliary rails.
Availability
MAX6364PUT26+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, point-of-sale terminals, and smart meters requiring stable component supply and long-term battery-backed memory retention.
Supply support for MAX6364PUT26+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 product line delivers integrated power-supply monitoring and battery switchover for microprocessor systems where reliability, low quiescent current, and small footprint are critical-especially in portable and battery-critical applications.
FAQ
What is the exact reset threshold voltage of MAX6364PUT26+T?
The MAX6364PUT26+T has a factory-preset reset threshold of 2.63V, with ±1.5% accuracy over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold" for suffix "26". The threshold remains stable across supply voltage (1.2V–5.5V) and temperature, ensuring consistent brownout detection for 2.5V system rails.
How does the RESET IN pin function on MAX6364PUT26+T?
The RESET IN pin on MAX6364PUT26+T compares an external voltage to an internal 1.235V ±0.05V bandgap reference. When the applied voltage falls below this threshold, the device asserts reset. It is designed for secondary supply monitoring-for example, using R1=273kΩ and R2=100kΩ to detect undervoltage on a 5.0V rail at 4.60V. Input leakage is ±25nA max, enabling high-impedance divider networks without accuracy loss.
What is the battery switchover behavior of MAX6364PUT26+T?
MAX6364PUT26+T switches OUT from VCC to VBATT when VCC falls below the 2.63V reset threshold AND VCC is at least 20mV lower than VBATT. It reverts to VCC when VCC rises 20mV above VBATT. This 40mV hysteresis prevents chattering during slow VCC recovery. The internal MOSFET's on-resistance varies with VBATT (e.g., 2.7Ω at 2.8V), limiting voltage drop under typical SRAM loads.
Can MAX6364PUT26+T operate with a single-cell lithium battery?
Yes, MAX6364PUT26+T operates from +1.2V to +5.5V on both VCC and VBATT, making it compatible with single-cell lithium batteries (nominal 3.6V, range 2.5V–4.2V). Its 2.63V reset threshold aligns with the lower end of this range, ensuring timely switchover before the cell reaches end-of-life voltage. Quiescent current of 11µA at 2.8V and 0.02µA battery standby current maximize usable battery capacity.
What package and footprint does MAX6364PUT26+T use?
MAX6364PUT26+T uses a 6-pin SOT23 package (outline U6-1, land pattern 90-0175), measuring 2.9mm × 1.6mm × 1.1mm. It shares the same footprint with all MAX6361–MAX6364 variants, enabling PCB design reuse across different reset thresholds and output configurations. The "+T" suffix denotes lead-free, RoHS-compliant packaging with matte tin finish.
MAX6364PUT26+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:
- 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-6
MAX6364PUT26+T FAQ
1.How can I place an order for MAX6364PUT26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6364PUT26+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 MAX6364PUT26+T reliable?
The price and inventory of MAX6364PUT26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6364PUT26+T is usually 5 days.
3.What payment methods are accepted for MAX6364PUT26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6364PUT26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6364PUT26+T?
MAX6364PUT26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6364PUT26+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 MAX6364PUT26+T?
For technical support, including MAX6364PUT26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6364PUT26+T requirements.
6.How does Aetrix verify that MAX6364PUT26+T is sourced from the original manufacturer or authorized distributors?
All MAX6364PUT26+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 MAX6364PUT26+T meets industry standards.
7.What is the process for return or replacement of MAX6364PUT26+T?
All MAX6364PUT26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6364PUT26+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 MAX6364PUT26+T part is unused and in its original packaging.
Return procedure for MAX6364PUT26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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