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Analog Devices Inc./Maxim Integrated MAX6385XS45D5-T
- Part No.:
- MAX6385XS45D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS45D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,799
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Product details
Overview
MAX6385XS45D5-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.50V reset threshold, 280ms minimum VCC reset timeout, and manual reset input (MR), designed for reliable power-on reset assertion in low-voltage embedded systems operating from +1.8V to +5.0V supply. It consumes only 3μA at +1.8V and guarantees valid reset output down to VCC = 1V.
For engineers reviewing the MAX6385XS45D5-T datasheet, MAX6385XS45D5-T pinout, MAX6385XS45D5-T application, or MAX6385XS45D5-T equivalent, key selection considerations include its 4.50V ±2.5% threshold accuracy over -40°C to +125°C, MR debounce capability, SC70-4 package footprint, and compatibility with dual-rail voltage monitoring systems requiring deterministic reset timing.
Technical Context
The MAX6385XS45D5-T integrates a precision voltage comparator with ±2.5% threshold accuracy across temperature, an internal reset timer with fixed 280ms timeout, and a debounced manual reset input with 63kΩ internal pullup. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after timeout.
It operates across 1.0V to 5.5V supply range, supports MR pulse widths as short as 1μs, rejects glitches ≥100ns, and provides guaranteed logic state validity down to VCC = 1V - enabling robust reset signaling even during deep brownout events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.50V nominal, ±2.5% over -40°C to +125°C - ensures accurate detection of 4.5V rail collapse without false triggers |
| VCC Reset Timeout | 280ms minimum - holds processor in reset long enough for stable power-up of 3.3V/5V peripherals |
| Supply Current | 3μA at +1.8V - enables use in battery-backed or ultra-low-power wake-up circuits |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during severe brownout while maintaining valid RESET output |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup when using momentary switch for manual reset |
| Reset Output Type | Active-high push-pull - directly interfaces with μP RESET# pins without external pullup or level translation |
| Temperature Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6385XS45D5-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 space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and monitored voltage rail - powers device and serves as primary reset trigger source |
| 2 | RESET | Active-high push-pull output - asserts high during VCC undervoltage or MR activation; sinks/source current per spec |
| 3 | MR | Active-low manual reset input - logic-low pulse forces reset; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Ground reference - common return path for VCC, RESET, and MR; required for proper comparator biasing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.50V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration |
| Deterministic reset timeout | 280ms minimum VCC reset period - ensures sufficient hold time for FPGA configuration or flash boot sequence |
| Integrated MR debounce | No external RC filtering needed - internal circuitry rejects <100ns noise on manual reset line |
| Valid reset down to VCC = 1V | Guaranteed logic state integrity during deep brownout - prevents premature release of processor reset |
| Low quiescent current | 3μA at 1.8V - extends battery life in portable instrumentation and sensor nodes |
Applications
| Industrial PLC Power Sequencing | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring 5V system rail during cold-crank battery dip to prevent MCU lockup. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M4 core during VCC drop below 4.50V. Use Value: 280ms timeout ensures MCU remains held until 5V rail stabilizes post-cranking; MR allows service-mode forced reboot. |
Use Scenario: Ensuring deterministic startup of LIN gateway MCU after ignition-on power ramp. IC Role / Device Role / Timing Role: Primary reset generator with 4.50V threshold tracking 5V supply; MR supports diagnostic tool reset injection. Use Value: ±2.5% threshold accuracy prevents spurious resets during slow 5V rise; -40°C to +125°C rating matches under-dash thermal profile. |
| Medical Infusion Pump Controller | Smart Energy Meter Microcontroller |
Use Scenario: Validating main 3.3V rail integrity before enabling motor driver and display subsystems. IC Role / Device Role / Timing Role: Active-high reset supervisor interfacing directly with TI MSP430F5xx RESET# input. Use Value: Push-pull output eliminates external pullup, reducing BOM count; 3μA supply current minimizes standby drain on backup coin cell. |
Use Scenario: Coordinating secure boot of metering SoC after AC/DC converter output reaches regulation. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 3.3V logic rail and accepts MR from tamper-detection circuit. Use Value: Internal 63kΩ MR pullup simplifies tamper-switch interface; 280ms timeout aligns with EEPROM write-complete window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS46D5-T | 4.63V reset threshold (vs. 4.50V); otherwise identical pinout, timing, and features | Suitable where tighter margin above 4.5V rail is required to avoid nuisance resets during ripple | Select when system rail nominal is 4.7V–4.8V and requires higher trip point |
| MAX6326XR45D5+T | Same 4.50V threshold and 280ms timeout, but active-low open-drain output and no MR input | Requires external pullup resistor; lacks manual reset capability; lower cost for basic reset-only functions | Choose when active-low logic interface is preferred and MR is unnecessary |
Compared with MAX6385XS45D5-T, MAX6385XS46D5-T raises the reset threshold by 130mV for improved noise margin on noisy 4.5V rails, while MAX6326XR45D5+T trades MR and push-pull drive for reduced cost and simpler interface in non-manual-reset applications.
Availability
MAX6385XS45D5-T is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, AEC-Q100-aligned reliability, and long-term production continuity.
Supply support for MAX6385XS45D5-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, emphasizing low power, high accuracy, and rugged operation.
The MAX6381–MAX6390 family delivers single/dual-supply microprocessor supervisory circuits optimized for low-voltage, low-power embedded systems where deterministic reset behavior and minimal board area are critical.
FAQ
What is the exact reset threshold voltage of MAX6385XS45D5-T and how stable is it over temperature?
The MAX6385XS45D5-T has a factory-set nominal reset threshold of 4.50V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This means the actual threshold falls between 4.39V and 4.61V across temperature, ensuring reliable detection of 4.5V rail failures without false triggering due to drift.
Does MAX6385XS45D5-T support manual reset, and what is the internal pullup value on the MR pin?
Yes, MAX6385XS45D5-T includes a debounced manual reset input (MR) pin with an internal 63kΩ pullup resistor to VCC. This allows direct connection of a normally-open momentary switch between MR and GND without external components, and guarantees MR recognition of pulses as short as 1μs.
What is the reset timeout duration for MAX6385XS45D5-T, and is it adjustable?
The MAX6385XS45D5-T has a fixed minimum reset timeout of 280ms following VCC recovery above the 4.50V threshold. This value is factory-programmed and not user-adjustable; it is selected via the "D5" suffix in the part number and ensures sufficient hold time for complex microcontroller initialization sequences.
Can MAX6385XS45D5-T operate reliably when VCC drops below 1.8V?
Yes, MAX6385XS45D5-T is guaranteed to maintain valid logic states on its RESET output down to VCC = 1.0V. Its supply current remains only 3μA at 1.8V and increases to 6μA at 3.6V, enabling robust operation during deep brownout conditions common in battery-powered systems.
What package type and footprint does MAX6385XS45D5-T use, and is it RoHS-compliant?
MAX6385XS45D5-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, with RoHS-compliant lead-free termination indicated by the "+T" suffix. The land pattern is documented as 90-0187, and the package supports reflow soldering up to +260°C.
MAX6385XS45D5-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:
- 4.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS45D5-T FAQ
1.How can I place an order for MAX6385XS45D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS45D5-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 MAX6385XS45D5-T reliable?
The price and inventory of MAX6385XS45D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS45D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS45D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS45D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS45D5-T?
MAX6385XS45D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS45D5-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 MAX6385XS45D5-T?
For technical support, including MAX6385XS45D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS45D5-T requirements.
6.How does Aetrix verify that MAX6385XS45D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS45D5-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 MAX6385XS45D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS45D5-T?
All MAX6385XS45D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS45D5-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 MAX6385XS45D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS45D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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