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Analog Devices Inc./Maxim Integrated MAX6385XS31D6-T
- Part No.:
- MAX6385XS31D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS31D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
MAX6385XS31D6-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 3.08V reset threshold, 560ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors +1.8V to +5.0V supply rails in space-constrained embedded systems, consuming only 3μA at +1.8V and guaranteeing valid reset output down to VCC = 1V. Designed for critical microprocessor power-up sequencing and brownout protection.
For engineers reviewing the MAX6385XS31D6-T datasheet, MAX6385XS31D6-T pinout, MAX6385XS31D6-T application, or MAX6385XS31D6-T equivalent, key selection criteria include its 3.08V ±2.5% threshold accuracy over –40°C to +125°C, 4-pin SC70 package footprint, MR input with internal 63kΩ pullup, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Technical Context
The MAX6385XS31D6-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer for deterministic 560ms reset assertion after VCC recovery. Its active-high push-pull RESET output drives directly into μP reset inputs without external pullups.
It integrates a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection, internally pulled up to VCC via 63kΩ - eliminating external components for basic reset initiation. The device operates from 1.0V to 5.5V and guarantees correct logic state down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% over –40°C to +125°C - ensures reliable detection of 3.3V rail brownout before system instability. |
| VCC Reset Timeout | 560ms minimum - provides sufficient hold time for μP initialization and peripheral stabilization after power recovery. |
| Supply Current | 3μA at +1.8V - enables use in battery-powered equipment with multi-year shelf life. |
| Operating Voltage | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic families. |
| MR Input Pullup | 63kΩ internal resistor - allows direct connection of momentary switch to GND without external components. |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup and ensures fast, low-impedance deassertion. |
| Transient Immunity | Rejects VCC glitches ≤35µs at 100mV overdrive - prevents false resets in noisy power environments. |
Pinout & Package
MAX6385XS31D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 1.25mm × 1.25mm × 0.95mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset trigger source. |
| 2 | RESET | Active-high push-pull output - asserts high during fault conditions and remains high for full 560ms timeout. |
| 3 | MR | Active-low manual reset input - initiates reset when pulled low; internally pulled up to VCC (63kΩ). |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% tolerance over full industrial temperature range - eliminates external resistor networks and calibration. |
| Deterministic reset timeout | 560ms minimum guaranteed period - ensures μP core and peripherals fully initialize before release. |
| Low-voltage operation | Valid reset assertion down to VCC = 1V - maintains system integrity during deep brownout events. |
| Integrated MR pullup | 63kΩ internal resistor - reduces BOM count and PCB area by removing external pullup requirement. |
| Negative transient immunity | Immune to VCC glitches ≤35µs duration at 100mV overdrive - suppresses false resets in electrically noisy environments. |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Monitoring 3.3V I/O supply in compact x86 or ARM-based SBCs during cold start and line dropout. IC Role / Device Role / Timing Role: μP supervisory circuit providing active-high reset signal synchronized to VCC recovery. Use Value: Prevents boot corruption by holding reset for 560ms until 3.3V rail stabilizes within ±2.5% of 3.08V threshold. | Use Scenario: Power supervision in PLC I/O modules with isolated 24V-to-3.3V DC/DC converters. IC Role / Device Role / Timing Role: Primary reset generator triggered by main 3.3V logic rail, with MR enabling field-service reset. Use Value: Guarantees clean restart after brownout using factory-calibrated 3.08V threshold and eliminates external timing components. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Battery-backed data loggers requiring reliable startup after Li-ion voltage sag below 3.3V. IC Role / Device Role / Timing Role: Low-power supervisor asserting reset during VCC dip and releasing after 560ms recovery window. Use Value: 3μA quiescent current extends battery life; ±2.5% threshold accuracy ensures consistent trip point across temperature swings. | Use Scenario: Wearable medical sensors powered by single-cell LiPo where supply drops from 4.2V to 3.0V during discharge. IC Role / Device Role / Timing Role: Active-high reset controller monitoring 3.3V LDO output, with MR supporting user-initiated recalibration. Use Value: 3.08V threshold aligns precisely with safe operating margin of 3.3V rail; 4-pin SC70 minimizes footprint on ultra-thin PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS31D3-T | Same 3.08V threshold and MR input, but 140ms VCC reset timeout (vs. 560ms) | Suitable for faster-booting systems where shorter reset hold time is acceptable | Select when system initialization completes well under 140ms and reduced timeout improves responsiveness |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 200ms timeout, 1.8V–6.5V operation, no MR input | Lacks manual reset functionality; tighter threshold tolerance but fixed 3.3V trip point | Choose when absolute threshold precision >3.3V is required and MR is not needed; note different pinout and no MR support |
Compared with MAX6385XS31D3-T and TPS3808G33DBVR, the MAX6385XS31D6-T uniquely balances 3.08V accuracy, 560ms robust hold time, and integrated MR in a 4-pin SC70 - making it optimal for space-constrained industrial controllers needing field-service reset and extended initialization windows.
Availability
MAX6385XS31D6-T is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and automotive-grade reliability (AEC-Q100 qualified variants available).
Supply support for MAX6385XS31D6-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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed μP supervisors targeting space- and power-sensitive embedded systems requiring guaranteed reset behavior across wide temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6385XS31D6-T?
The MAX6385XS31D6-T has a factory-set reset threshold of 3.08V, 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 3.00V nominal, 3.08V typical, 3.15V max). The MAX6385XS31D6-T uses this precise threshold to monitor 3.3V supply rails without external calibration.
Does the MAX6385XS31D6-T support manual reset functionality?
Yes, the MAX6385XS31D6-T includes a debounced manual reset input (MR) on Pin 3. Driving MR low forces an immediate reset assertion, which remains active for the full 560ms timeout after MR is released. An internal 63kΩ pullup resistor connects MR to VCC, allowing direct switch-to-ground implementation without external components. This feature is explicitly documented for MAX6385 in the Selector Guide and Pin Description sections.
What package type and dimensions does the MAX6385XS31D6-T use?
The MAX6385XS31D6-T is packaged in a lead-free, RoHS-compliant 4-pin SC70 (outline 21-0098), measuring 1.25mm × 1.25mm × 0.95mm. This is confirmed in the Ordering Information table, where "XS" denotes the 4-pin SC70 variant. The land pattern number is 90-0187, and thermal resistance (θJA) is 322.6°C/W on a multilayer board.
What is the minimum VCC voltage at which the MAX6385XS31D6-T guarantees valid reset output?
The MAX6385XS31D6-T guarantees correct RESET output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures reliable reset assertion during deep brownout conditions before the supply collapses completely. The device remains functional and maintains output integrity even as VCC decays from 5.5V to 1.0V.
How does the MAX6385XS31D6-T handle short VCC transients?
The MAX6385XS31D6-T provides built-in immunity to negative-going VCC transients: it will not assert reset for glitches ≤35µs duration when the overdrive (VTH – VCC) is 100mV, per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive." This prevents spurious resets caused by switching noise or coupling, and a 0.1µF capacitor placed near VCC further enhances immunity.
MAX6385XS31D6-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:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS31D6-T FAQ
1.How can I place an order for MAX6385XS31D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS31D6-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 MAX6385XS31D6-T reliable?
The price and inventory of MAX6385XS31D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS31D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS31D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS31D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS31D6-T?
MAX6385XS31D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS31D6-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 MAX6385XS31D6-T?
For technical support, including MAX6385XS31D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS31D6-T requirements.
6.How does Aetrix verify that MAX6385XS31D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS31D6-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 MAX6385XS31D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS31D6-T?
All MAX6385XS31D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS31D6-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 MAX6385XS31D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS31D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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