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Analog Devices Inc./Maxim Integrated MAX6364PUT29-T
- Part No.:
- MAX6364PUT29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6364PUT29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,528
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Product details
Overview
MAX6364PUT29-T 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 2.93V reset threshold, 150ms minimum reset timeout, and supports backup-battery operation for SRAM retention in brownout conditions. Used in portable/battery-powered equipment requiring reliable power monitoring.
For engineers reviewing the MAX6364PUT29-T datasheet, MAX6364PUT29-T pinout, MAX6364PUT29-T application, or MAX6364PUT29-T equivalent, key selection criteria include its adjustable RESET IN comparator (1.235V reference), SOT23-6 package compatibility, guaranteed reset assertion down to 1.2V VCC/VBATT, and support for secondary supply undervoltage detection via external resistor divider.
Technical Context
The MAX6364PUT29-T integrates a precision voltage comparator for the RESET IN input referenced to an internal 1.235V bandgap, enabling programmable secondary supply monitoring using external R1/R2 dividers. Its battery switchover logic activates when VCC falls below both the 2.93V threshold and VBATT by ≥20mV, with 40mV hysteresis preventing oscillation during slow VCC decay.
It delivers active-low open-drain RESET output with guaranteed valid state down to 1.2V supply, 0.3V VOL at 1.6mA sink, and 1µA leakage. The device guarantees 150ms minimum reset timeout after VCC recovery and exhibits transient immunity up to 30µs for 100mV overdrive below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% - factory-trimmed precision threshold for primary VCC monitoring |
| RESET IN Reference | 1.235V ±0.05V - internal bandgap reference enabling accurate secondary supply undervoltage detection |
| Supply Voltage Range | +1.2V to +5.5V - supports ultra-low-voltage operation and full 3.3V/5V system compatibility |
| Reset Timeout Period | 150ms minimum - ensures µP initialization completes before release from reset |
| Quiescent Current | 11µA at VCC = 2.8V - enables multi-year battery life in backup mode |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and flexible pull-up voltage selection |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.1mm × 1.6mm footprint, 0.95mm height). RoHS-compliant lead-free variant (marked "+T"); this part uses "-T" suffix indicating standard leaded packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during VCC < 2.93V, RESET IN < 1.235V, or after timeout; requires external pull-up |
| 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 (via R1/R2 divider) to 1.235V reference; asserts reset if input < 1.235V |
| 4 - VCC | Main supply input | Primary power source; powers internal circuitry and supplies OUT when above 2.93V threshold |
| 5 - OUT | Power output | Switches between VCC and VBATT; sources up to 150mA from VCC, up to 10mA from battery |
| 6 - BATT | Backup battery input | Connects to Li+ or coin cell; automatically engages when VCC drops below VBATT −20mV and VTH |
Key Features
| Feature | Design Value |
|---|---|
| User-adjustable RESET IN | Enables precise secondary supply monitoring (e.g., 4.60V logic rail) using external resistor divider with <25nA input bias |
| Battery switchover hysteresis | 40mV built-in hysteresis prevents chattering during slow VCC decay in brownout scenarios |
| Guaranteed 1.2V operation | RESET remains valid and functional even as VCC or VBATT drops to 1.2V - critical for deep-battery discharge survival |
| Low quiescent current | 11µA typical supply current at 2.8V enables >10-year shelf life on 200mAh coin cell in backup mode |
| Transient immunity | Withstands 30µs negative VCC transients of 100mV amplitude without false reset assertion |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-powered glucose meters and ECG monitors retaining SRAM data during main supply interruption. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC brownout detection, automatic battery switchover to SRAM, and RESET assertion to halt processor during unsafe voltage conditions. Use Value: Ensures clinical data integrity across power transitions with 2.93V threshold aligned to 3.0V Li+ cutoff and 150ms reset hold guaranteeing safe µP restart. |
Use Scenario: Remote environmental sensors logging temperature/humidity to nonvolatile memory using intermittent solar charging. IC Role / Device Role / Timing Role: Monitors primary regulated supply and secondary analog sensor rail via RESET IN; triggers reset if either falls below safe operating level. Use Value: Prevents corrupted sensor readings by asserting reset before ADC reference or µP core voltage collapses, using 1.235V internal reference for stable secondary rail monitoring. |
| POS Terminals | Smart Meters |
|
Use Scenario: Retail point-of-sale terminals with backup supercapacitor maintaining real-time clock and transaction buffer during AC outage. IC Role / Device Role / Timing Role: Controls power path from main 5V supply to RTC/SRAM; asserts RESET to freeze transaction state until stable power returns. Use Value: Guarantees atomic transaction commit by holding reset for ≥150ms after VCC recovery, preventing partial writes during marginal power conditions. |
Use Scenario: Electricity meters with tamper-detection circuitry requiring persistent memory and secure boot sequencing during grid fluctuations. IC Role / Device Role / Timing Role: Provides dual-rail supervision - primary VCC for MCU and RESET IN for isolated metering ASIC supply - with independent reset assertion. Use Value: Enables compliance with IEC 62053-21 by ensuring metering ASIC resets independently if its dedicated 3.3V rail dips, while main µP remains operational. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6364HUT29-T | Same 2.93V threshold and RESET IN function, but active-high open-drain RESET output instead of active-low | Requires inverted reset logic on µP side; incompatible with systems expecting active-low reset assertion | Select only if host µP accepts active-high reset or external inverter is acceptable |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no auxiliary RESET IN input, push-pull active-low RESET, 35µA ICC | Lacks secondary supply monitoring capability; suitable only for single-rail VCC supervision | Choose when only primary 3.3V rail monitoring is needed and lower cost is prioritized over flexibility |
Compared with MAX6364PUT29-T, MAX6364HUT29-T provides identical supervision functionality but requires system-level reset polarity adaptation, while TPS3808G33DBVR offers lower cost and simpler integration for basic 3.3V-only applications but sacrifices the critical RESET IN feature for secondary rail monitoring.
Availability
MAX6364PUT29-T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, smart meters, and battery-backed SRAM applications requiring stable component supply across long production lifecycles.
Supply support for MAX6364PUT29-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 management, sensing, and interface applications in industrial, computing, and communications markets.
The MAX6361–MAX6364 family was engineered specifically for microprocessor systems needing integrated power-supply monitoring, battery switchover, and flexible reset control in space-constrained portable and industrial equipment.
FAQ
What is the exact reset threshold voltage of the MAX6364PUT29-T?
The MAX6364PUT29-T has a factory-trimmed reset threshold of 2.93V, with ±1.5% tolerance over -40°C to +85°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "MAX636_UT29" ordering code. The threshold remains stable across temperature and supply variations, ensuring consistent brownout detection for 3.0V systems.
How does the RESET IN pin function on the MAX6364PUT29-T?
The RESET IN pin on the MAX6364PUT29-T connects to an internal 1.235V precision reference comparator. When the voltage at RESET IN falls below 1.235V, the device asserts RESET. Users configure secondary supply monitoring using an external resistor divider (R1/R2) per the equation VRTH = 1.235V × (1 + R1/R2), enabling accurate undervoltage detection for rails like 4.60V or 2.5V.
Can the MAX6364PUT29-T operate with a 1.2V supply?
Yes, the MAX6364PUT29-T guarantees full functionality-including valid RESET output state and accurate reset threshold detection-down to 1.2V on either VCC or VBATT. This is confirmed in the Electrical Characteristics table under "RESET/RESET Valid Down to 1.2V Guaranteed", making it suitable for ultra-low-voltage battery backup applications where supply may sag near end-of-life.
What is the purpose of the 40mV hysteresis in the MAX6364PUT29-T battery switchover?
The 40mV hysteresis in the MAX6364PUT29-T battery switchover prevents rapid toggling between VCC and battery power when VCC decays slowly near the switchover point. It requires VCC to fall 20mV below VBATT to engage battery mode and rise 20mV above VBATT to revert to VCC, eliminating oscillation that could damage backup cells or corrupt memory writes during marginal power conditions.
Does the MAX6364PUT29-T support both VCC and VBATT as power sources for the OUT pin?
Yes, the MAX6364PUT29-T dynamically routes power to the OUT pin: when VCC is above the 2.93V threshold and exceeds VBATT by >20mV, OUT is sourced from VCC (up to 150mA); when VCC drops below threshold and VBATT is higher, OUT switches to VBATT (up to 10mA). This dual-source architecture ensures uninterrupted power to SRAM or real-time clocks during main supply failure.
MAX6364PUT29-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:
- 2.93V
- 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
MAX6364PUT29-T FAQ
1.How can I place an order for MAX6364PUT29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6364PUT29-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 MAX6364PUT29-T reliable?
The price and inventory of MAX6364PUT29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6364PUT29-T is usually 5 days.
3.What payment methods are accepted for MAX6364PUT29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6364PUT29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6364PUT29-T?
MAX6364PUT29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6364PUT29-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 MAX6364PUT29-T?
For technical support, including MAX6364PUT29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6364PUT29-T requirements.
6.How does Aetrix verify that MAX6364PUT29-T is sourced from the original manufacturer or authorized distributors?
All MAX6364PUT29-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 MAX6364PUT29-T meets industry standards.
7.What is the process for return or replacement of MAX6364PUT29-T?
All MAX6364PUT29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6364PUT29-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 MAX6364PUT29-T part is unused and in its original packaging.
Return procedure for MAX6364PUT29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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