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Analog Devices Inc./Maxim Integrated MAX6385XS31D5-T
- Part No.:
- MAX6385XS31D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS31D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
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Product details
Overview
MAX6385XS31D5-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.08V reset threshold, 280ms minimum VCC reset timeout, and manual reset input. It monitors single-supply voltage (1.0V–5.5V), 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 battery-powered industrial controllers and embedded power management systems.
For engineers reviewing the MAX6385XS31D5-T datasheet, MAX6385XS31D5-T pinout, MAX6385XS31D5-T application, or MAX6385XS31D5-T equivalent, key selection criteria include its active-high push-pull reset output, 3.08V ±2.5% threshold accuracy over temperature, 280ms reset timeout, integrated MR pullup resistor (~63kΩ), and SC70-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6385XS31D5-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 280ms reset assertion after VCC rises above 3.08V or after release of the active-low manual reset (MR) input.
Reset logic is synchronized to ensure immunity to sub-100ns noise on MR and rejects negative-going VCC transients up to 35µs duration when overdriven by 100mV below threshold. The device asserts RESET high during fault conditions and holds it for the full timeout period before deassertion, guaranteeing μP initialization integrity during brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% (factory-trimmed; ensures reliable detection of 3.3V rail brownout) |
| Reset Timeout | 280ms min (guarantees sufficient hold time for μP boot sequence after power recovery) |
| Supply Current | 3μA at 1.8V (enables >10-year battery life in always-on monitoring applications) |
| Operating Voltage | 1.0V to 5.5V (supports operation down to near-dead battery voltage while maintaining reset validity) |
| Output Type | Active-high push-pull (drives high without external pullup; sinks 80μA @ 1.0V, sources 150μA @ 1.8V) |
| MR Input Pullup | 63kΩ internal (eliminates need for external resistor; compatible with open-drain/COTS switch interfaces) |
| Temp Range | –40°C to +125°C (AEC-Q100 qualified for automotive under-hood and industrial control environments) |
Pinout & Package
MAX6385XS31D5-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 PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node; accepts 1.0V–5.5V; powers internal circuitry and reference |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion; guaranteed valid down to VCC = 1V |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ; initiates reset when pulled low |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane for stable threshold operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 3.08V threshold | Eliminates external resistor divider; reduces BOM count and layout area in 3.3V systems |
| 280ms reset timeout | Matches typical μP boot initialization windows; avoids premature release before firmware execution begins |
| 3μA supply current at 1.8V | Enables integration into ultra-low-power sensor nodes without compromising battery lifetime |
| MR input with 63kΩ pullup | Supports direct connection to momentary switches or logic outputs without external components |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic μP state during deep brownout; prevents spurious resets during slow power decay |
Applications
| Industrial PLC I/O Module | Battery-Powered Data Logger |
|---|---|
Use Scenario: Monitors 3.3V logic supply in programmable logic controller I/O expansion modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M4 MCU during rail undervoltage events. Use Value: 3.08V threshold matches 3.3V rail tolerance; 280ms timeout exceeds bootloader execution time; –40°C to +125°C rating ensures reliability in uncontrolled enclosures. | Use Scenario: Powers cycle-counting and environmental sensing in remote field-deployed loggers running on coin-cell batteries. IC Role / Device Role / Timing Role: Low-current supervisor enabling wake-up reset after deep sleep; MR input used for field-service forced reboot. Use Value: 3μA quiescent current extends battery life beyond 10 years; 3.08V threshold prevents false reset during gradual battery discharge; SC70-4 footprint saves board space. |
| Automotive Body Control Module | Medical Point-of-Care Monitor |
Use Scenario: Provides power-on reset and brownout protection for microcontroller in non-safety-critical body electronics (e.g., door module). IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor ensuring deterministic startup after ignition cycling and load-dump transients. Use Value: ±2.5% threshold accuracy over temperature eliminates calibration drift; 280ms timeout accommodates CAN bus initialization sequence; MR supports technician diagnostic reset. | Use Scenario: Ensures reliable boot sequencing in portable ECG/SpO₂ monitors requiring FDA-grade power integrity. IC Role / Device Role / Timing Role: Active-high reset generator interfacing directly with medical-grade ARM processor reset pin. Use Value: Push-pull output eliminates external pullup (reducing failure modes); guaranteed reset validity to 1V prevents lockup during battery swap; RoHS-compliant SC70 package meets medical material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS31D3-T | Same 3.08V threshold and MR input, but 140ms reset timeout | Better suited for fast-boot MCUs (e.g., RISC-V cores) where shorter hold time is acceptable | Select when boot firmware completes in <150ms and faster recovery is prioritized over margin |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), 200ms timeout, 1.8V–6.5V range, SOT-23-5 package | Higher accuracy and wider voltage range, but requires external pullup for active-high output and lacks MR debouncing | Choose when tighter threshold tolerance is critical and board space allows SOT-23-5; verify MR interface compatibility |
Compared with MAX6385XS31D5-T, the MAX6385XS31D3-T offers reduced reset hold time for speed-sensitive designs, while the TPS3808G30DBVR provides higher threshold accuracy and broader supply range at the cost of added external components and no integrated MR debounce.
Availability
MAX6385XS31D5-T is available at Aetrix Electronics and suitable for industrial control systems, battery-powered instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX6385XS31D5-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 power management, sensing, and interface applications in industrial, automotive, and medical markets.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for reliable μP reset generation in space- and energy-constrained embedded systems with demanding environmental requirements.
FAQ
What is the exact reset threshold voltage of the MAX6385XS31D5-T?
The MAX6385XS31D5-T has a factory-set reset threshold of 3.08V, specified with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "31" corresponds to nominal 3.08V), and applies to VCC monitoring only - the device does not feature auxiliary RESET IN functionality.
Does the MAX6385XS31D5-T support manual reset, and how is it implemented?
Yes, the MAX6385XS31D5-T includes an active-low manual reset (MR) input on Pin 3. It features an internal 63kΩ pullup resistor to VCC, allowing direct connection to a momentary switch (to GND) or logic signal without external components. MR assertion forces RESET high for the full 280ms timeout period, and the input rejects glitches shorter than 100ns.
What package type and dimensions does the MAX6385XS31D5-T use?
The MAX6385XS31D5-T is supplied in a lead(Pb)-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 the recommended land pattern is 90-0187. This compact package enables high-density placement in portable and automotive PCBs.
Is the MAX6385XS31D5-T qualified for automotive applications?
Yes, the MAX6385XS31D5-T is AEC-Q100 qualified for automotive applications. While the part number suffix does not include "/V", the device is explicitly listed in the Ordering Information table as available in automotive-grade versions (e.g., MAX6385XS31D5/V+T), and its –40°C to +125°C operating range, robust transient immunity, and guaranteed performance over temperature meet AEC-Q100 Grade 1 requirements.
How does the reset output behavior of the MAX6385XS31D5-T differ from open-drain alternatives?
The MAX6385XS31D5-T features an active-high push-pull RESET output (Pin 2), which actively drives high during reset and actively pulls low when deasserted. Unlike open-drain variants, it requires no external pullup resistor, simplifies interface design, and guarantees valid logic levels down to VCC = 1V - critical for brownout recovery in low-voltage systems where pullup resistors would fail.
MAX6385XS31D5-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:
- 3.08V
- 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
MAX6385XS31D5-T FAQ
1.How can I place an order for MAX6385XS31D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS31D5-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 MAX6385XS31D5-T reliable?
The price and inventory of MAX6385XS31D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS31D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS31D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS31D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS31D5-T?
MAX6385XS31D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS31D5-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 MAX6385XS31D5-T?
For technical support, including MAX6385XS31D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS31D5-T requirements.
6.How does Aetrix verify that MAX6385XS31D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS31D5-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 MAX6385XS31D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS31D5-T?
All MAX6385XS31D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS31D5-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 MAX6385XS31D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS31D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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