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Analog Devices Inc./Maxim Integrated MAX6385XS40D6-T
- Part No.:
- MAX6385XS40D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS40D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
MAX6385XS40D6-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.0V reset threshold, 560ms minimum VCC reset timeout, and manual reset input (MR), designed for reliable power-up/power-down monitoring 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 MAX6385XS40D6-T datasheet, MAX6385XS40D6-T pinout, MAX6385XS40D6-T application, or MAX6385XS40D6-T equivalent, key selection criteria include its 4.0V ±2.5% threshold accuracy over –40°C to +125°C, debounced MR input with internal 63kΩ pullup, 4-pin SC70 package, and compatibility with dual-voltage monitoring systems requiring deterministic reset timing.
Technical Context
The MAX6385XS40D6-T implements a precision voltage comparator with ±2.5% threshold accuracy across –40°C to +125°C and integrates a monostable timer for fixed 560ms reset assertion after VCC recovery. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly without external pullup.
It features a dedicated active-low manual reset input (MR) with internal 63kΩ pullup resistor, supporting TTL/CMOS-compatible triggering and noise immunity via optional 0.1μF capacitor to GND. The device operates over full 1.0V–5.5V VCC range and maintains guaranteed logic state integrity down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00V nominal, ±2.5% over –40°C to +125°C - ensures accurate brownout detection for 3.3V/5V rails |
| VCC Reset Timeout | 560ms minimum - provides sufficient hold-off time for processor initialization and clock stabilization |
| Supply Current | 3μA at +1.8V - enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V supply |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and ensures fast, rail-to-rail logic transitions |
| Manual Reset Input | MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external components |
| Temperature Range | –40°C to +125°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6385XS40D6-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 PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source for reset threshold detection |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current when deasserted |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internally pulled up to VCC |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.0V reset threshold | Eliminates external resistor divider and calibration effort for 3.3V system monitoring |
| 560ms minimum reset timeout | Guarantees sufficient processor hold time for boot ROM execution and PLL lock on cold start |
| Debounced MR input with internal pullup | Enables direct switch interface without external RC network or Schmitt trigger |
| Valid reset output down to VCC = 1V | Ensures deterministic state during deep undervoltage events before complete power collapse |
| ±2.5% threshold accuracy over temperature | Maintains reliable reset margin across industrial temperature extremes without derating |
Applications
| Industrial PLC Controller Power Monitoring | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitors 5V auxiliary rail in programmable logic controller during cold cranking and load dump transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M7 MCU upon VCC drop below 4.0V. Use Value: 560ms timeout prevents spurious resets during <100ms dips; MR allows field-service firmware reload via front-panel button. | Use Scenario: Ensures safe startup of BCM microcontroller after vehicle ignition sequence with variable battery voltage. IC Role / Device Role / Timing Role: Active-high reset generator triggered by 12V-to-5V LDO output, synchronized with ignition key transition. Use Value: 4.0V threshold matches 5V rail tolerance; ±2.5% accuracy avoids false triggers during engine-run voltage ripple (13.2–14.8V). |
| Medical Infusion Pump Logic Safety | Smart Energy Meter Microcontroller Supervision |
Use Scenario: Validates main 3.3V supply before enabling motor driver and sensor acquisition in battery-operated infusion pump. IC Role / Device Role / Timing Role: Primary reset supervisor for safety-critical MSP430F6779A, asserting reset until stable 3.3V is confirmed for >560ms. Use Value: 3μA quiescent current extends battery life; MR input enables nurse-initiated system reboot without power cycle. | Use Scenario: Monitors isolated 3.3V DC-DC output powering metrology SoC in utility-grade electricity meter. IC Role / Device Role / Timing Role: Resets AFE and communication stack when 3.3V rail sags below 4.0V due to transformer inrush or lightning surge. Use Value: Negative-going transient immunity prevents false resets during 100ns–1μs grid disturbances; 4-pin SC70 eases layout in tight meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR40D6+T | Same 4.0V threshold and 560ms timeout, but active-low open-drain output requiring external pullup | Lacks MR input; intended for simpler single-reset systems without manual intervention | Select when board already uses open-drain reset bus architecture and MR is unnecessary |
| TLV809E40DBZR | 4.0V threshold, 200ms timeout, no MR input, SOT-23-3 package, 0.5μA supply current | Lower power but shorter timeout; not suitable for processors requiring >300ms initialization | Prefer for ultra-low-power IoT nodes where reset duration is less critical than current draw |
Compared with MAX6326XR40D6+T and TLV809E40DBZR, the MAX6385XS40D6-T uniquely combines active-high push-pull drive, integrated MR functionality, and industrial-grade temperature performance - making it optimal for systems needing robust manual intervention and deterministic timing without external components.
Availability
MAX6385XS40D6-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, smart energy meters, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS40D6-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, communications, and computing markets, emphasizing reliability, low power, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across harsh thermal environments.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS40D6-T?
The MAX6385XS40D6-T has a factory-set nominal reset threshold of 4.00V, 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 3.90V and 4.10V at +25°C, and between 3.90V and 4.10V across temperature extremes - ensuring consistent brownout detection for 3.3V and 5V systems.
Does MAX6385XS40D6-T support manual reset, and how is it implemented?
Yes, MAX6385XS40D6-T includes a dedicated active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 560ms timeout after MR is released. No external components are required - a simple momentary switch from MR to GND suffices, and optional 0.1μF capacitor to GND adds noise immunity in electrically noisy environments.
What package type and dimensions does MAX6385XS40D6-T use?
MAX6385XS40D6-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098). Its footprint measures 2.0mm × 2.1mm with a maximum height of 0.95mm, and it uses land pattern 90-0187. This compact package enables high-density PCB layouts in portable and space-constrained industrial modules.
Can MAX6385XS40D6-T operate reliably at very low supply voltages?
Yes, MAX6385XS40D6-T guarantees correct reset output logic state down to VCC = 1.0V, and operates across a full 1.0V to 5.5V supply range. Its 3μA supply current at +1.8V and validated functionality at 1V ensure deterministic behavior during deep brownout conditions - critical for fail-safe shutdown in battery-backed systems before complete power loss.
Is MAX6385XS40D6-T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6385XS40D6-T is explicitly pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series, as confirmed in the datasheet Features section. This allows drop-in replacement in existing designs using 4-pin SC70 reset supervisors, preserving layout and bill-of-materials while upgrading to improved accuracy, lower current, and integrated MR functionality.
MAX6385XS40D6-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:
- 4V
- 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
MAX6385XS40D6-T FAQ
1.How can I place an order for MAX6385XS40D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS40D6-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 MAX6385XS40D6-T reliable?
The price and inventory of MAX6385XS40D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS40D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS40D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS40D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS40D6-T?
MAX6385XS40D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS40D6-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 MAX6385XS40D6-T?
For technical support, including MAX6385XS40D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS40D6-T requirements.
6.How does Aetrix verify that MAX6385XS40D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS40D6-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 MAX6385XS40D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS40D6-T?
All MAX6385XS40D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS40D6-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 MAX6385XS40D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS40D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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