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Analog Devices Inc./Maxim Integrated MAX6386LT46D3+T
- Part No.:
- MAX6386LT46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6386LT46D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6386LT46D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.63V reset threshold (±2.5% over −40°C to +125°C), and 140ms minimum VCC reset timeout. It monitors single supply voltage in battery-powered controllers and portable instrumentation, asserting reset during brownout or power-up until stable operation resumes.
For engineers reviewing the MAX6386LT46D3+T datasheet, MAX6386LT46D3+T pinout, MAX6386LT46D3+T application, or MAX6386LT46D3+T equivalent, key selection criteria include guaranteed reset validity down to VCC = 1V, debounced manual reset input with internal 63kΩ pullup, and compatibility with dual-voltage systems requiring precise 4.63V threshold detection.
Technical Context
The MAX6386LT46D3+T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 4.63V threshold, with ±2.5% accuracy across −40°C to +125°C. Its internal timer enforces a minimum 140ms reset assertion after VCC recovers above threshold.
It features a dedicated active-low manual reset input (MR) with internal 63kΩ pullup resistor, supporting TTL/CMOS logic drive and requiring no external debounce. The open-drain RESET output requires an external pullup and sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over −40°C to +125°C - ensures reliable brownout detection for 5V systems |
| VCC Reset Timeout | 140ms minimum - guarantees μP initialization completes before code execution resumes |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| Reset Output Type | Open-drain active-low - allows wired-OR configuration and level translation with external pullup |
| Manual Reset Input | Active-low MR with 63kΩ internal pullup - eliminates need for external resistor in most applications |
| Reset Propagation Delay | 35µs max (VCC falling) - provides fast response to supply transients |
Pinout & Package
MAX6386LT46D3+T is housed in a 6-pin µDFN package (1.5mm × 1.0mm, 0.5mm pitch) with wettable flanks, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator |
| 2 | VCC | Primary supply input and monitored voltage source for reset threshold detection |
| 3 | N.C. | No internal connection - must be left unconnected or tied to GND |
| 4 | MR | Active-low manual reset input with internal 63kΩ pullup to VCC |
| 5 | N.C. | No internal connection - must be left unconnected or tied to GND |
| 6 | RESET | Open-drain active-low reset output requiring external pullup resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider and calibration effort for 5V rail monitoring |
| 140ms reset timeout | Matches typical μP boot sequence timing without requiring external RC timing components |
| Open-drain RESET output | Enables shared reset bus across multiple ICs and supports mixed-voltage system interfacing |
| Debounced MR input | Accepts direct switch connection without external RC filtering or digital debounce logic |
| 3μA supply current at 1.8V | Reduces quiescent power in always-on subsystems such as real-time clocks or sensor wake logic |
Applications
| Portable Medical Monitors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG or SpO₂ monitoring powered by coin-cell batteries with strict energy budget. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and asserts reset if voltage sags below 4.63V during cold-start or battery depletion. Use Value: Prevents corrupted memory writes or missed samples by guaranteeing full μP reset before firmware initializes ADC and communication peripherals. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes using ultra-low-power MCU. IC Role / Device Role / Timing Role: Provides 140ms reset pulse on power-up and manual reset via pushbutton to recover from firmware lockup. Use Value: Ensures deterministic startup state and eliminates need for external reset supervisor IC or discrete RC network. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted controller with isolated 24V-to-5V DC/DC converter powering logic section. IC Role / Device Role / Timing Role: Monitors 5V rail for brownout events caused by load transients or input ripple; open-drain output interfaces directly to optocoupled reset line. Use Value: Maintains system reliability under harsh electrical noise with guaranteed reset assertion down to VCC = 1V. | Use Scenario: Dashboard cluster module requiring AEC-Q100 compliance and immunity to automotive load-dump transients. IC Role / Device Role / Timing Role: Detects 5V supply collapse during cranking; 4.63V threshold aligns with CAN transceiver and display driver minimum operating voltage. Use Value: Prevents undefined display states or erroneous CAN messages by enforcing clean reset before firmware enters safety-critical routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR46D3+T | Same 4.63V threshold and 140ms timeout, but 3-pin SC70 package (no MR input) | Lacks manual reset capability - unsuitable where field service or test-mode reset is required | Select when board space is constrained and manual reset is unnecessary |
| TLV809E46DBZR | 4.6V threshold (±1%), 140ms timeout, SOT-23-3, no MR input, 0.5μA ICC at 1.8V | Lower quiescent current but no manual reset and different pinout - not drop-in compatible | Choose for ultra-low-power applications where MR is omitted and footprint change is acceptable |
Compared with MAX6386LT46D3+T, MAX6326XR46D3+T saves board area but removes manual reset functionality, while TLV809E46DBZR reduces supply current by 83% yet requires PCB redesign and forfeits field-service reset capability.
Availability
MAX6386LT46D3+T is available at Aetrix Electronics and suitable for portable medical monitors, battery-powered data loggers, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term production continuity.
Supply support for MAX6386LT46D3+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, with emphasis on high-reliability, low-power solutions.
The MAX6381–MAX6390 family delivers single/dual-supply microprocessor reset supervision with factory-trimmed thresholds, targeting space-constrained, battery-sensitive, and automotive-grade embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6386LT46D3+T and how accurate is it over temperature?
The MAX6386LT46D3+T has a nominal reset threshold of 4.63V, with guaranteed accuracy of ±2.5% across the full operating temperature range of −40°C to +125°C. This specification is validated per the manufacturer's Electrical Characteristics table and ensures robust brownout detection for 5V systems under extreme environmental conditions. The MAX6386LT46D3+T maintains this tolerance without requiring external calibration.
Does MAX6386LT46D3+T support manual reset, and what is the internal pullup value on the MR pin?
Yes, MAX6386LT46D3+T includes a dedicated active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. This allows direct connection of a momentary switch to GND without external components. The MR pin accepts TTL/CMOS logic levels and remains functional across the full 1.0V to 5.5V supply range. The MAX6386LT46D3+T datasheet confirms this value in the Electrical Characteristics table under "MR Internal Pullup Resistance".
What package type and dimensions does MAX6386LT46D3+T use, and is it RoHS-compliant?
MAX6386LT46D3+T uses a 6-pin µDFN package measuring 1.5mm × 1.0mm with 0.5mm pitch and wettable flanks. It is lead-free and RoHS-compliant, indicated by the "+T" suffix in the part number. The package outline number is 21-0147, and land pattern number is 90-0080 per Maxim's official package documentation. The MAX6386LT46D3+T thermal resistance (θJA) is 477°C/W on a multilayer board.
Can MAX6386LT46D3+T operate reliably at very low supply voltages, and down to what VCC level is reset output guaranteed?
Yes, MAX6386LT46D3+T operates over an input voltage range of 1.0V to 5.5V, and its reset output state is guaranteed valid down to VCC = 1.0V. This ensures deterministic reset behavior during deep brownout or battery discharge scenarios. The MAX6386LT46D3+T maintains correct logic levels on both MR and RESET pins within this range, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections.
What is the reset timeout duration for MAX6386LT46D3+T, and is it adjustable?
The MAX6386LT46D3+T has a fixed minimum reset timeout of 140ms after VCC rises above the 4.63V threshold. This value is factory-programmed and not user-adjustable; it corresponds to the "D3" suffix in the part number. The timeout is guaranteed over temperature and process variation, eliminating the need for external timing components. The MAX6386LT46D3+T datasheet specifies this as tRP = 140ms (min) in the Reset Timeout Period table.
MAX6386LT46D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6386LT46D3+T FAQ
1.How can I place an order for MAX6386LT46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386LT46D3+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 MAX6386LT46D3+T reliable?
The price and inventory of MAX6386LT46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386LT46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6386LT46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386LT46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386LT46D3+T?
MAX6386LT46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386LT46D3+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 MAX6386LT46D3+T?
For technical support, including MAX6386LT46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386LT46D3+T requirements.
6.How does Aetrix verify that MAX6386LT46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6386LT46D3+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 MAX6386LT46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6386LT46D3+T?
All MAX6386LT46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386LT46D3+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 MAX6386LT46D3+T part is unused and in its original packaging.
Return procedure for MAX6386LT46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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