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Analog Devices Inc./Maxim Integrated MAX6385XS39D6-T
- Part No.:
- MAX6385XS39D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS39D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
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Product details
Overview
MAX6385XS39D6-T from Maxim Integrated is a precision active-high push-pull μP supervisory circuit with factory-set 3.90V reset threshold, 560ms minimum VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and operates across -40°C to +125°C for use in automotive power management and industrial microcontroller systems.
For engineers reviewing the MAX6385XS39D6-T datasheet, MAX6385XS39D6-T pinout, MAX6385XS39D6-T application, or MAX6385XS39D6-T equivalent, key selection considerations include its 3.90V ±2.5% threshold accuracy over temperature, 4-pin SC70 package footprint, active-high push-pull reset output logic, and integrated MR debouncing with internal 63kΩ pullup - critical for reliable brownout recovery in battery-powered controllers and dual-voltage embedded systems.
Technical Context
The MAX6385XS39D6-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over -40°C to +125°C and 60ppm/°C tempco, paired with a monolithic timer that enforces a guaranteed-minimum 560ms reset assertion after VCC recovers above 3.90V. Its active-high push-pull output drives high during reset and low otherwise, eliminating need for external pullup resistors.
It features a dedicated active-low manual reset input (MR) with internal 63kΩ pullup to VCC, supporting TTL/CMOS-compatible triggering and glitch rejection of 100ns. Reset remains asserted for the full 560ms timeout after MR release, ensuring deterministic μP initialization independent of VCC ramp rate or noise transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.90V nominal, ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 560ms minimum - guarantees sufficient μP hold time for stable clock and memory initialization before code execution |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instrumentation |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions down to 1V rail collapse |
| Output Type | Active-high push-pull - eliminates external pullup resistor, reduces BOM count, and provides fast rise/fall edges into 100pF load |
| Manual Reset Input | MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external components or debounce circuitry |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures predictable logic state during power-down sequences where supply decays below 1.8V |
Pinout & Package
MAX6385XS39D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node - powers internal circuitry and feeds reset comparator |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks/source current per spec without external biasing |
| 3 | MR | Active-low manual reset input - forces reset when pulled ≤0.3×VCC; internal 63kΩ pullup ensures default high state |
| 4 | GND | Analog/digital ground reference - must be connected directly to system ground plane for stable threshold accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.90V with ±2.5% tolerance over full temperature range - eliminates need for external resistor divider calibration |
| Guaranteed reset timing | 560ms minimum timeout after VCC recovery - ensures μP core and peripherals fully stabilize before release |
| Low-power operation | 3μA supply current at +1.8V - extends battery life in portable medical devices and wireless sensor nodes |
| MR input integration | Internal 63kΩ pullup and 100ns glitch rejection - enables robust manual reset with single-pole switch, no external RC network |
| VCC transient immunity | Immune to negative-going VCC glitches <560µs at 100mV overdrive - prevents spurious resets in noisy power environments |
Applications
| Industrial Power Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Real-time monitoring of 3.3V I/O rail and 5V MCU supply in programmable logic controllers under variable load and temperature. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M4 core during undervoltage events, with 560ms hold time ensuring flash controller readiness. Use Value: Prevents corrupted register writes and firmware lockups during line transients, meeting IEC 61000-4-4 Level 3 immunity requirements. | Use Scenario: Brownout protection for infotainment head unit powered by dual DC-DC converters (12V→5V and 12V→3.3V). IC Role / Device Role / Timing Role: Resets application processor and audio codec simultaneously upon 3.90V rail collapse, with MR enabling service-mode forced reboot via dashboard button. Use Value: Eliminates need for discrete reset generator and external debounce logic, reducing PCB area by 22mm² and qualifying AEC-Q100 Grade 2. |
| Portable Medical Instrumentation | Dual-Voltage FPGA Configuration System |
Use Scenario: Battery-backed glucose meter with Li-ion cell (2.7V–4.2V) powering 3.0V analog front-end and 1.8V digital subsystem. IC Role / Device Role / Timing Role: Monitors 3.0V rail and asserts reset to MSP430 MCU if voltage drops below 3.90V threshold during cold-start or battery aging. Use Value: Enables safe shutdown before ADC reference drift exceeds 0.5%, preserving clinical measurement integrity per ISO 13485. | Use Scenario: Configuration sequencing for Xilinx Artix-7 FPGA requiring strict 1.0V core and 2.5V I/O power-up order with fault recovery. IC Role / Device Role / Timing Role: Provides synchronized reset pulse to FPGA PROG_B and configuration controller after both supplies exceed 3.90V, using MR for JTAG-initiated reconfiguration. Use Value: Guarantees deterministic bitstream loading by enforcing 560ms minimum reset duration, preventing partial configuration failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS39D3-T | Same 3.90V threshold and MR input, but 140ms VCC reset timeout instead of 560ms | Suitable for faster-booting microcontrollers with minimal peripheral initialization latency | Select when system boot time budget is <200ms and shorter reset hold is acceptable |
| TLV809K39DBZR | 3.9V threshold, 140ms timeout, SOT-23-3 package, no MR input, ±1.5% initial accuracy | Lacks manual reset capability and has tighter initial tolerance but lower cost and smaller footprint | Choose for cost-sensitive consumer electronics where MR is unnecessary and tighter initial accuracy is prioritized |
Compared with MAX6385XS39D6-T, MAX6385XS39D3-T offers faster reset release but less margin for slow-ramping supplies, while TLV809K39DBZR trades MR functionality and temperature stability for reduced size and cost - making MAX6385XS39D6-T optimal for automotive and industrial designs requiring guaranteed 560ms hold time and field-serviceable reset initiation.
Availability
MAX6385XS39D6-T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, portable medical instruments, and dual-voltage FPGA configuration systems requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6385XS39D6-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 communications applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-quiescent-current μP supervisors optimized for battery-powered equipment and harsh-environment systems requiring guaranteed reset behavior across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6385XS39D6-T and how stable is it over temperature?
The MAX6385XS39D6-T has a factory-set nominal reset threshold of 3.90V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts no more than ±0.312mV/°C - ensuring consistent brownout detection in automotive engine compartments and industrial enclosures.
Does MAX6385XS39D6-T require an external pullup resistor on its RESET output?
No, MAX6385XS39D6-T does not require an external pullup resistor because it features an active-high push-pull RESET output. The device internally sources and sinks current to drive the output high during reset and low otherwise, simplifying design and reducing component count compared to open-drain alternatives like MAX6383.
What is the function and electrical behavior of the MR pin on MAX6385XS39D6-T?
The MR pin on MAX6385XS39D6-T is an active-low manual reset input with an internal 63kΩ pullup resistor to VCC. Driving MR ≤0.3×VCC asserts reset; release triggers the full 560ms timeout. It rejects glitches <100ns and accepts TTL/CMOS logic levels, enabling direct switch-to-GND connection without external debounce components.
Can MAX6385XS39D6-T operate reliably when VCC drops below 1.8V?
Yes, MAX6385XS39D6-T guarantees correct RESET output logic state down to VCC = 1.0V, as confirmed in its Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset assertion during deep brownout events common in battery-depleted portable systems, unlike many competitors that fail below 1.5V.
What package type and dimensions does MAX6385XS39D6-T use, and is it RoHS-compliant?
MAX6385XS39D6-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant, and its thermal resistance θJA is 322.6°C/W on a multilayer PCB - critical for thermal-aware layout in dense automotive modules.
MAX6385XS39D6-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS39D6-T FAQ
1.How can I place an order for MAX6385XS39D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS39D6-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 MAX6385XS39D6-T reliable?
The price and inventory of MAX6385XS39D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS39D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS39D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS39D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS39D6-T?
MAX6385XS39D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS39D6-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 MAX6385XS39D6-T?
For technical support, including MAX6385XS39D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS39D6-T requirements.
6.How does Aetrix verify that MAX6385XS39D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS39D6-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 MAX6385XS39D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS39D6-T?
All MAX6385XS39D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS39D6-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 MAX6385XS39D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS39D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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