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Analog Devices Inc./Maxim Integrated MAX6386LT44D3+T
- Part No.:
- MAX6386LT44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6386LT44D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,434
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Product details
Overview
MAX6386LT44D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.38V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered or embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6386LT44D3+T datasheet, MAX6386LT44D3+T pinout, MAX6386LT44D3+T application, or MAX6386LT44D3+T equivalent, key selection criteria include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and compatibility with manual reset switch interfaces requiring no external debounce.
Technical Context
The MAX6386LT44D3+T implements a precision bandgap-based reset comparator with 60ppm/°C tempco and internal 140ms timeout timer. Its MR input features a 63kΩ internal pullup resistor and rejects <100ns glitches, enabling robust manual reset initiation without external components.
This device uses an open-drain RESET output requiring an external pullup resistor, ensuring level-shifting capability and wired-OR compatibility in multi-supervisor systems. Reset assertion is guaranteed for VCC ≥ 1.0V, supporting operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (4.27V–4.48V min/max), factory-trimmed for stable monitoring of 4.5V rails |
| Reset Timeout Period | 140ms minimum after VCC rise above threshold - ensures sufficient μP initialization time |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| Reset Output Type | Open-drain active-low - supports mixed-voltage systems and bus arbitration via external pullup |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows direct connection to momentary switch without RC network |
| Threshold Accuracy | ±2.5% over full temperature range - eliminates need for system-level calibration in harsh environments |
Pinout & Package
MAX6386LT44D3+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Monitored voltage rail (1.0V–5.5V); powers internal circuitry and sets reset threshold reference |
| 2 - GND | Ground reference | Return path for all internal currents; must be low-impedance to ensure accurate threshold detection |
| 3 - MR | Active-low manual reset input | Logic-low pulse forces reset assertion; internal 63kΩ pullup holds high when unused |
| 4 - RESET | Open-drain active-low reset output | Drives low during reset; requires external pullup resistor to host logic rail (e.g., 10kΩ to 3.3V) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set reset threshold | 4.38V with ±2.5% tolerance over -40°C to +125°C - eliminates external resistor divider and calibration effort |
| Guaranteed reset validity | Functional down to VCC = 1.0V - ensures deterministic reset state during severe brownout before power collapse |
| MR input immunity | 100ns glitch rejection and 1µs minimum pulse width - prevents spurious resets from EMI or switch bounce |
| Negative-going transient immunity | Withstands VCC dips up to 35µs at 100mV overdrive - suppresses false triggers from digital switching noise |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring nodes beyond 10 years (typical) |
Applications
| Industrial PLC Power Sequencing | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitoring 5V system rail during cold-cranking and load-dump transients in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 MCU until 5V rail stabilizes above 4.38V for ≥140ms. Use Value: Prevents firmware corruption during engine start-up by holding reset until power settles, leveraging ±2.5% threshold stability across -40°C to +125°C. |
Use Scenario: Ensuring safe boot of infotainment SoC after vehicle ignition cycle with variable battery voltage (6V–16V). IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 3.3V domain, coordinating reset timing between microcontroller and PMIC during power-up sequencing. Use Value: Enables level-shifted reset signaling and wired-OR capability with other supervisors, critical for fault-tolerant BCM architectures. |
| Portable Medical Sensor Hub | Smart Energy Meter MCU Supervision |
|
Use Scenario: Battery-backed glucose monitor requiring >10-year shelf life and reliable wake-from-reset on button press. IC Role / Device Role / Timing Role: Manual reset input (MR) connected to tactile switch; internal 63kΩ pullup eliminates external resistor, reducing BOM count. Use Value: 3μA supply current at 1.8V enables decade-long operation on CR2032; 140ms timeout ensures full ADC and BLE radio initialization. |
Use Scenario: Monitoring 3.3V auxiliary rail derived from isolated DC-DC converter in revenue-grade metering IC subsystem. IC Role / Device Role / Timing Role: Detects undervoltage on metering SoC supply and asserts reset to prevent erroneous kWh accumulation during brownout. Use Value: ±2.5% threshold accuracy eliminates field recalibration; open-drain output interfaces directly with I²C-bus–compatible reset controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR43D3+T | Same 4-pin SC70 package, 4.30V reset threshold, but push-pull active-low output (no external pullup required) | Lacks manual reset input (MR); not suitable for systems requiring operator-initiated reset | Select when board layout prohibits external pullup or MR functionality is unnecessary |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, SOT-23-5 package; higher 8μA ICC at 3.3V | Includes watchdog timer (absent in MAX6386LT44D3+T); requires 5th pin for WDI | Choose when watchdog supervision is mandatory and 5-pin footprint is acceptable |
Compared with MAX6386LT44D3+T, MAX6326XR43D3+T simplifies schematic design by eliminating the pullup resistor but sacrifices manual reset capability; TPS3808G33DBVR adds watchdog functionality at the cost of higher quiescent current and larger footprint - making MAX6386LT44D3+T optimal for MR-dependent, ultra-low-power 4-pin applications.
Availability
MAX6386LT44D3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, automotive body control modules, portable medical sensor hubs, and smart energy meter MCU supervision requiring stable component supply across extended temperature ranges.
Supply support for MAX6386LT44D3+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 demanding industrial, automotive, and computing applications, with emphasis on reliability and low-power operation.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting space- and power-constrained embedded systems needing guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6386LT44D3+T and how is it specified?
The MAX6386LT44D3+T has a factory-set nominal reset threshold of 4.38V, with guaranteed limits of 4.27V (min) and 4.48V (max) at +25°C, and ±2.5% tolerance over the full -40°C to +125°C operating range. This value is encoded in the "44" suffix per the Reset Threshold table in the datasheet, and applies specifically to the MAX6386 variant with LT prefix and D3 timeout.
Does MAX6386LT44D3+T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6386LT44D3+T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. The MR pin accepts TTL/CMOS logic levels: VIH ≥ 0.7×VCC (for VTH < 4V) and VIL ≤ 0.3×VCC. A logic-low pulse ≥1µs forces reset assertion, and the device guarantees 100ns glitch rejection to prevent false triggering.
What package type and dimensions does MAX6386LT44D3+T use, and is it RoHS-compliant?
MAX6386LT44D3+T is supplied in a 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant, with thermal resistance θJA = 322.6°C/W on a multilayer board.
How does the open-drain RESET output of MAX6386LT44D3+T function, and what external component is required?
The RESET output of MAX6386LT44D3+T is open-drain active-low and requires an external pullup resistor to the target logic rail (e.g., 3.3V or 5V). When asserted, it sinks up to 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V); leakage is ≤1.0µA when deasserted. This configuration enables level shifting and wired-OR reset bus implementation.
What is the minimum supply voltage at which MAX6386LT44D3+T guarantees correct reset output state?
MAX6386LT44D3+T guarantees valid RESET output logic state down to VCC = 1.0V, meaning the open-drain output remains functional and correctly asserted/deasserted even during deep brownout conditions. This specification is explicitly confirmed in the Electrical Characteristics table and ensures deterministic behavior prior to complete power collapse.
MAX6386LT44D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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)
MAX6386LT44D3+T FAQ
1.How can I place an order for MAX6386LT44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386LT44D3+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 MAX6386LT44D3+T reliable?
The price and inventory of MAX6386LT44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386LT44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6386LT44D3+T?
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4.How is shipping managed for MAX6386LT44D3+T?
MAX6386LT44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386LT44D3+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 MAX6386LT44D3+T?
For technical support, including MAX6386LT44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386LT44D3+T requirements.
6.How does Aetrix verify that MAX6386LT44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6386LT44D3+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 MAX6386LT44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6386LT44D3+T?
All MAX6386LT44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386LT44D3+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 MAX6386LT44D3+T part is unused and in its original packaging.
Return procedure for MAX6386LT44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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