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Analog Devices Inc./Maxim Integrated MAX6385XS46D3+T
- Part No.:
- MAX6385XS46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS46D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,391
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Product details
Overview
MAX6385XS46D3+T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.63V reset threshold, 140ms minimum VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS46D3+T datasheet, MAX6385XS46D3+T pinout, MAX6385XS46D3+T application, or MAX6385XS46D3+T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR input pullup resistance (63kΩ), guaranteed operation at VCC ≥ 1V, and compatibility with SC70-4 packaging for space-constrained embedded designs.
Technical Context
The MAX6385XS46D3+T implements a precision voltage comparator with internal 4.63V reference and a monostable timer that asserts RESET high for ≥140ms after VCC rises above threshold or after MR release. Its active-high push-pull output drives directly into μP reset inputs without external pullup.
It features a debounced manual reset input (MR) with internal 63kΩ pullup to VCC, supporting TTL/CMOS logic levels and momentary switch interfaces. The device operates across −40°C to +125°C and maintains ±2.5% reset threshold accuracy over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±2.5% tolerance over −40°C to +125°C - ensures accurate detection of 5V rail brownout |
| VCC Reset Timeout | 140ms (minimum) - holds μP in reset long enough for stable power-up of core and I/O domains |
| Supply Current | 3μA at +1.8V - enables use in always-on battery-backed systems with multi-year runtime |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout down to 1V |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup and simplifies PCB layout |
| Output Type | Active-high push-pull - drives reset line directly; no external components required |
| Temperature Range | −40°C to +125°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6385XS46D3+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, suitable for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and sets reset detection point |
| 2 | RESET | Active-high push-pull output; drives μP reset pin high during fault conditions and remains asserted for 140ms post-recovery |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; initiates reset when pulled to GND |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider; reduces BOM count and layout area in 5V system monitoring |
| 140ms guaranteed reset timeout | Ensures sufficient hold time for 5V-powered microcontrollers to complete internal initialization before code execution |
| Debounced MR input with 63kΩ pullup | Supports direct connection of mechanical switches without external RC filtering or logic gates |
| Valid operation down to VCC = 1V | Prevents spurious reset release during slow power-down sequences common in battery discharge profiles |
| −40°C to +125°C operation | Enables deployment in industrial control panels and automotive body electronics without derating |
Applications
| Portable Medical Monitor | Battery-Powered IoT Sensor Node |
|---|---|
|
Use Scenario: Wearable ECG monitor powered by single Li-ion cell with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and asserts active-high RESET to ARM Cortex-M0+ during brownout events below 4.63V. Use Value: Prevents firmware corruption by holding processor in reset until regulated 3.3V rail stabilizes post-transmission, leveraging 140ms timeout and 3μA quiescent current. |
Use Scenario: LoRaWAN end-node operating on coin-cell battery with intermittent wake-up cycles and deep sleep. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for ultra-low-power MCU; MR pin enables OTA firmware recovery via GPIO-triggered reset. Use Value: Guarantees clean boot sequence after battery insertion or voltage recovery, while 63kΩ MR pullup avoids leakage current drain during multi-year shelf life. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
|
Use Scenario: DIN-rail mounted controller with dual 24V/5V supplies where 5V rail may dip during relay switching. IC Role / Device Role / Timing Role: Supervises 5V logic supply; RESET output tied to FPGA configuration reset pin to prevent partial bitstream loading. Use Value: ±2.5% threshold accuracy over −40°C to +125°C ensures consistent trip point across ambient temperature swings in uncooled enclosures. |
Use Scenario: Door module with CAN interface and LIN transceivers powered from vehicle battery (9V–16V) via local LDO. IC Role / Device Role / Timing Role: Monitors 5V LDO output; active-high RESET synchronizes microcontroller startup with power rail stabilization after ignition-on. Use Value: SC70-4 footprint allows placement near MCU in tight AEC-Q100-compliant layout; 140ms timeout aligns with typical LDO soft-start duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS46D2+T | 20ms reset timeout vs. 140ms - shorter assertion period | Suitable for fast-boot MCUs with minimal initialization; insufficient for systems requiring extended power-rail stabilization | Select when faster reset release is needed and VCC recovery is rapid; verify μP reset deassertion timing margin |
| MAX6385LT46D3+T | 6-pin μDFN (L611+1) vs. 4-pin SC70 - larger footprint, same electrical specs | Preferred for thermal management in high-ambient environments; supports higher reflow profile compatibility | Choose for industrial designs needing enhanced thermal dissipation or existing μDFN land patterns |
Compared with MAX6385XS46D3+T, the D2 variant offers quicker reset release but less margin for slow-rising rails, while the LT46D3 variant provides identical functionality in a thermally robust 6-pin package-enabling design flexibility without compromising reset accuracy or MR functionality.
Availability
MAX6385XS46D3+T is available at Aetrix Electronics and suitable for portable medical monitors, battery-powered IoT sensor nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term manufacturability.
Supply support for MAX6385XS46D3+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 industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.
MAX6385XS46D3+T belongs to the MAX6381–MAX6390 family of low-voltage, low-power μP supervisory circuits engineered for robust power-monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6385XS46D3+T?
The MAX6385XS46D3+T has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C). This value is factory-trimmed and does not require external calibration. The '46' suffix in MAX6385XS46D3+T explicitly denotes the 4.63V threshold per Maxim's ordering guide.
Does MAX6385XS46D3+T support manual reset functionality?
Yes, MAX6385XS46D3+T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an active-high RESET assertion for the full 140ms timeout period after MR is released. No external components are required, and MR accepts standard TTL/CMOS logic levels.
What package type and dimensions does MAX6385XS46D3+T use?
MAX6385XS46D3+T uses a lead-free, RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its small footprint and thermal resistance (θJA = 322.6°C/W on multilayer board) make it ideal for compact, high-density PCB layouts in portable electronics.
Can MAX6385XS46D3+T operate reliably at low supply voltages?
Yes, MAX6385XS46D3+T guarantees correct RESET output state down to VCC = 1.0V, and operates across +1.0V to +5.5V. At +1.8V, it draws only 3μA, enabling use in battery-powered systems where supply voltage decays significantly during discharge.
Is MAX6385XS46D3+T qualified for automotive applications?
MAX6385XS46D3+T is AEC-Q100 qualified for automotive use, as confirmed in the datasheet's "Features" section. While the base part number lacks the '/V' suffix, its −40°C to +125°C operating range, ±2.5% threshold accuracy over temperature, and robust transient immunity meet automotive reliability requirements for body electronics and infotainment subsystems.
MAX6385XS46D3+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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS46D3+T FAQ
1.How can I place an order for MAX6385XS46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS46D3+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 MAX6385XS46D3+T reliable?
The price and inventory of MAX6385XS46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6385XS46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS46D3+T?
MAX6385XS46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS46D3+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 MAX6385XS46D3+T?
For technical support, including MAX6385XS46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS46D3+T requirements.
6.How does Aetrix verify that MAX6385XS46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS46D3+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 MAX6385XS46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6385XS46D3+T?
All MAX6385XS46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS46D3+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 MAX6385XS46D3+T part is unused and in its original packaging.
Return procedure for MAX6385XS46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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