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Analog Devices Inc./Maxim Integrated MAX6364PUT26+
- Part No.:
- MAX6364PUT26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6364PUT26+.pdf
- Description:
- MAX6364 LOW-POWER MICROPROCESSO
- Quantity:
- Payment:
- Shipping:
Inventory:877
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Product details
Overview
MAX6364PUT26+ from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary user-adjustable reset input (RESET IN), battery switchover, and active-low/open-drain reset output. It operates from +1.2V supply, features factory-preset 2.63V reset threshold, guarantees RESET/RESET validity down to 1.2V, and delivers 150ms minimum reset timeout - used in portable/battery-powered equipment for SRAM backup and brownout protection.
For engineers reviewing the MAX6364PUT26+ datasheet, MAX6364PUT26+ pinout, MAX6364PUT26+ application, or MAX6364PUT26+ equivalent, key selection criteria include its 2.63V VTH accuracy over -40°C to +85°C, 1.235V internal reference for external resistor-programmable secondary supply monitoring, SOT23-6 package footprint, and guaranteed 150ms reset timeout with power-fail warning capability.
Technical Context
The MAX6364PUT26+ implements a precision voltage comparator that monitors VCC against a factory-trimmed 2.63V threshold and independently compares RESET IN against a 1.235V internal bandgap reference. Its dual-path power management uses an internal MOSFET to switch OUT between VCC and BATT based on VCC–VBATT differential hysteresis (40mV).
It provides active-low open-drain RESET output with guaranteed assertion during VCC < VTH, RESET IN < 1.235V, or after manual reset release - all with 150ms minimum timeout. The device supports battery-backup mode only when VCC falls below both VTH and VBATT, and ignores MR, WDI, and RESET IN inputs during that state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 2.63V (factory-preset, ±1.5% accuracy over -40°C to +85°C; enables reliable monitoring of +2.5V systems) |
| RESET IN Reference | 1.235V (internal precision bandgap; allows resistor-divider programming of secondary supply reset thresholds) |
| Supply Voltage Range | +1.2V to +5.5V (supports operation directly from Li+ battery or low-voltage rails without external regulation) |
| Reset Timeout Period | 150ms minimum (guaranteed hold time ensures µP initialization completes before release) |
| Operating Temperature | -40°C to +85°C (fully specified industrial temperature range for embedded deployment) |
| Supply Current (ICC) | 15µA typical at VCC = 5.5V (ultra-low quiescent current extends battery life in always-on backup mode) |
| Battery Standby Current | 0.05µA max (enables multi-year operation on coin-cell batteries during VCC outage) |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.0mm × 1.25mm × 0.95mm height, RoHS-compliant lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low during VCC < VTH, RESET IN < 1.235V, or after reset release; requires external pull-up for logic-level compatibility |
| 2: GND | Ground reference | Primary return path for VCC, BATT, and internal circuitry; must be low-impedance connection to system ground plane |
| 3: RESET IN | Auxiliary reset input | Compares external voltage against 1.235V reference; falling edge below threshold triggers reset assertion |
| 4: VCC | Main supply input | Power source for internal circuitry and primary output path to OUT; monitored for reset generation |
| 5: OUT | Switched power output | Sources from VCC when valid; switches to BATT when VCC < VTH and VCC < VBATT; drives SRAM VDD or real-time clock |
| 6: BATT | Backup battery input | Provides backup power to OUT during brownout; internal 40mV hysteresis prevents oscillation near switchover point |
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 reference |
| Guaranteed 1.2V operation | Ensures functional reset assertion even as main supply decays to 1.2V - critical for clean shutdown of SRAM-backed systems |
| 150ms min reset timeout | Meets µP power-on reset timing requirements across full temperature range without external RC timing components |
| 40mV VCC–VBATT hysteresis | Prevents rapid cycling during slow VCC decay by requiring 40mV recovery before switching back from battery to main supply |
| 0.05µA battery standby current | Permits >10-year coin-cell battery life in backup mode, enabling long-term data retention in metering and IoT endpoints |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous ECG or glucose monitoring devices powered by single Li+ cell with SRAM-based buffer storage. IC Role / Device Role / Timing Role: Supervises main rail voltage, triggers reset on brownout, and switches SRAM VDD to backup battery to preserve last-read vital signs. Use Value: 0.05µA BATT standby current extends battery life beyond 5 years; 2.63V VTH matches nominal 2.5V LDO output for precise undervoltage detection. | Use Scenario: Remote environmental sensor nodes logging temperature/humidity to nonvolatile memory using µP with battery backup. IC Role / Device Role / Timing Role: Monitors 3.3V system rail and secondary 5V sensor bias supply via RESET IN; asserts reset if either fails during acquisition cycle. Use Value: 1.235V internal reference enables accurate 4.60V secondary threshold (R1=273kΩ, R2=100kΩ); eliminates need for second supervisor IC. |
| Smart Utility Meters | POS Terminal Backup Systems |
Use Scenario: Electricity/water meters with tamper-proof EEPROM and real-time clock requiring uninterrupted power during mains failure. IC Role / Device Role / Timing Role: Provides fail-safe switchover from 3.3V regulated supply to CR2032 coin cell; asserts RESET to halt µP execution during transition. Use Value: 40mV hysteresis prevents relay chatter during marginal AC line conditions; 150ms timeout ensures RTC register write completion before reset release. | Use Scenario: Retail point-of-sale terminals with flash memory storing transaction logs and requiring SRAM retention during brief power interruptions. IC Role / Device Role / Timing Role: Supplies clean 3.3V to SRAM during AC dropout; monitors 5V USB power rail via RESET IN to detect host disconnect events. Use Value: Dual-rail supervision (VCC + RESET IN) replaces discrete comparator solution; SOT23-6 footprint saves >3mm² PCB area versus SOIC-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6364HUT26+ | Same 2.63V VTH and RESET IN function, but active-high open-drain RESET output instead of active-low | Requires inverted logic handling in µP reset input; unsuitable for systems needing active-low assertion without external inverter | Select when host µP accepts active-high reset or when sharing RESET net with other active-high supervisors |
| TPS3808G125DBVR | 2.5V fixed VTH, no RESET IN pin, 200ms reset timeout, higher 24µA ICC, same SOT23-6 package | Lacks secondary supply monitoring; suitable only for single-rail systems where 2.5V threshold suffices and longer timeout is acceptable | Choose for cost-sensitive designs without auxiliary reset needs and where 2.5V vs. 2.63V threshold tolerance is acceptable |
Compared with MAX6364HUT26+, the MAX6364PUT26+ provides native active-low reset signaling compatible with most µPs; compared with TPS3808G125DBVR, it adds programmable secondary supply monitoring at lower quiescent current but requires external resistors for that function.
Availability
MAX6364PUT26+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart utility meters, and POS terminal backup systems requiring stable component supply across extended product lifecycles.
Supply support for MAX6364PUT26+ 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 targets ultra-low-power microprocessor supervision with integrated battery switchover - optimized for SRAM retention, brownout recovery, and secondary supply monitoring in space-constrained portable and embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6364PUT26+?
The MAX6364PUT26+ has a factory-preset reset threshold voltage (VTH) of 2.63V, with ±1.5% accuracy guaranteed over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and documented in the Electrical Characteristics table of the MAX6364PUT26+ datasheet under the "MAX636_UT26" suffix row. It is specifically designed to monitor +2.5V power rails with margin.
How does the RESET IN pin function on the MAX6364PUT26+?
The RESET IN pin on the MAX6364PUT26+ connects to an internal comparator referenced to a 1.235V precision bandgap voltage. When the voltage at RESET IN falls below 1.235V, the device asserts reset. This allows external resistor dividers to program custom reset thresholds for secondary supplies - for example, a 4.60V threshold is achieved with R1 = 273kΩ and R2 = 100kΩ, as shown in the MAX6364PUT26+ Typical Operating Circuit.
What package type and dimensions does the MAX6364PUT26+ use?
The MAX6364PUT26+ uses a 6-pin SOT23 package (package code U6-1, outline 21-0058), measuring 2.0mm × 1.25mm × 0.95mm. It is RoHS-compliant and lead-free, indicated by the "+" suffix. The pin configuration matches standard SOT23-6 footprints, with RESET on pin 1, GND on pin 2, RESET IN on pin 3, VCC on pin 4, OUT on pin 5, and BATT on pin 6 - verified in the MAX6364PUT26+ Pin Configurations diagram.
Does the MAX6364PUT26+ support battery backup operation, and how does switchover work?
Yes, the MAX6364PUT26+ supports battery backup via the BATT pin. Switchover occurs when VCC falls below both the reset threshold (2.63V) and VBATT by at least 20mV; an internal MOSFET then connects BATT to OUT. A 40mV hysteresis (VBATT – VCC ≥ 20mV to engage, ≤ –20mV to disengage) prevents oscillation. During backup mode, OUT is sourced from BATT, RESET is asserted, and MR/WDI/RESET IN inputs are ignored - all confirmed in Table 1 of the MAX6364PUT26+ datasheet.
What is the minimum reset timeout period guaranteed for the MAX6364PUT26+?
The MAX6364PUT26+ guarantees a minimum reset timeout period (tRP) of 150ms after VCC rises above the 2.63V threshold, after RESET IN returns high, or after any reset event. This value is production-tested and specified in the Electrical Characteristics table under "Reset-Active Timeout Period". It ensures sufficient hold time for microprocessor initialization across the full -40°C to +85°C temperature range without requiring external timing components.
MAX6364PUT26+ 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
MAX6364PUT26+ FAQ
1.How can I place an order for MAX6364PUT26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6364PUT26+ 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+ reliable?
The price and inventory of MAX6364PUT26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6364PUT26+ is usually 5 days.
3.What payment methods are accepted for MAX6364PUT26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6364PUT26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6364PUT26+?
MAX6364PUT26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6364PUT26+ 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+?
For technical support, including MAX6364PUT26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6364PUT26+ requirements.
6.How does Aetrix verify that MAX6364PUT26+ is sourced from the original manufacturer or authorized distributors?
All MAX6364PUT26+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6364PUT26+?
All MAX6364PUT26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6364PUT26+, 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+ part is unused and in its original packaging.
Return procedure for MAX6364PUT26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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