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Analog Devices Inc./Maxim Integrated MAX6385XS20D2-T
- Part No.:
- MAX6385XS20D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS20D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
MAX6385XS20D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.0V reset threshold (±2.5% over –40°C to +125°C), 20ms minimum reset timeout, and integrated debounced manual reset input (MR). It monitors VCC from +1.8V to +5.0V while consuming only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V - used in battery-powered controllers and portable instrumentation for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS20D2-T datasheet, MAX6385XS20D2-T pinout, MAX6385XS20D2-T application, or MAX6385XS20D2-T equivalent, key selection criteria include its 4-pin SC70 package, MR input with internal 63kΩ pullup, ±2.5% threshold accuracy across automotive temperature range, and compatibility with dual-voltage monitoring systems requiring deterministic reset timing.
Technical Context
The MAX6385XS20D2-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.0V, triggering an active-high reset assertion that persists for ≥20ms after VCC recovers. Its MR input accepts TTL/CMOS logic levels and initiates reset on low assertion, with internal debounce eliminating need for external RC filtering.
Reset output remains valid down to VCC = 1V, ensuring deterministic behavior during deep brownout. The device uses BiCMOS process for low quiescent current (3μA at 1.8V) and high noise immunity against negative-going VCC transients up to 35µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V nominal, ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive temperature range |
| Reset Timeout | 20ms minimum - provides sufficient hold time for microcontroller initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable devices |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP RESET pin |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch interface without external components |
| Operating Voltage | +1.0V to +5.5V - supports valid reset assertion even during severe undervoltage conditions |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial embedded applications |
Pinout & Package
MAX6385XS20D2-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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset threshold reference point |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks/source current per spec without external components |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internal 63kΩ pullup enables NC or VCC tie-off if unused |
| 4 | GND | Analog and digital ground reference - must be connected to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.0V with ±2.5% tolerance over full temperature range - eliminates need for external calibration or trimming resistors |
| Low-power operation | 3μA supply current at 1.8V - extends battery life in always-on portable instruments and IoT edge nodes |
| Guaranteed reset validity | Operates correctly down to VCC = 1V - prevents spurious release during deep brownout recovery |
| Integrated MR debounce | No external RC required - simplifies BOM and improves reliability in noisy environments with mechanical switches |
| Negative transient immunity | Rejects VCC glitches ≤35µs at 100mV overdrive - avoids false resets in electrically harsh automotive or industrial settings |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Wearable ECG sensor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises VCC during cold-start and low-battery brownout; asserts active-high RESET to hold MCU until stable 2.0V rail is established. Use Value: 3μA quiescent current preserves battery capacity; 20ms timeout ensures complete MCU boot sequence before release. |
Use Scenario: Environmental data logger deployed in remote field locations with solar-charged Li-ion battery. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and triggers reset on voltage sag below 2.0V; MR pin enables field technician-initiated reinitialization via tactile switch. Use Value: Internal MR pullup eliminates discrete resistor; ±2.5% threshold accuracy maintains consistent trip point across seasonal temperature swings. |
| Automotive Body Control Modules | Industrial PLC I/O Subsystems |
Use Scenario: Under-dash lighting controller exposed to engine compartment thermal cycling and load-dump transients. IC Role / Device Role / Timing Role: Provides AEC-Q100–qualified reset supervision for 5V microcontroller; rejects short VCC dips caused by relay switching noise. Use Value: 35µs glitch immunity prevents false resets; –40°C to +125°C operation ensures reliability across full vehicle lifecycle. |
Use Scenario: Modular I/O expansion board for programmable logic controllers requiring deterministic startup sequencing. IC Role / Device Role / Timing Role: Generates synchronized reset pulse to multiple ASICs and FPGAs upon power-up; MR input enables system-level firmware-triggered reboot. Use Value: Push-pull output drives heavy capacitive loads without rise-time degradation; 20ms timeout accommodates slow-ramping auxiliary rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT20D2-T | Same electrical specs but in 6-pin µDFN package - larger footprint, better thermal dissipation (θJA = 477°C/W vs. 322.6°C/W) | Suitable for high-density boards where SC70 placement is constrained or thermal margin is critical | Select when PCB layout requires smaller height profile or higher thermal performance is needed |
| MAX6326XR20D2-T | Pin-compatible alternative with identical 2.0V threshold and 20ms timeout, but higher ICC (7μA typ. at 1.8V) and no MR input | Lacks manual reset capability - requires external MR circuitry if system-level reset initiation is needed | Choose only if MR functionality is unnecessary and legacy MAX6326 footprint reuse is prioritized |
Compared with MAX6385XS20D2-T, the LT version offers improved thermal performance in µDFN but occupies more board area, while the MAX6326 variant sacrifices MR integration and consumes >2× more current - making MAX6385XS20D2-T optimal for compact, low-power, MR-enabled designs.
Availability
MAX6385XS20D2-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, automotive body control modules, and industrial PLC I/O subsystems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS20D2-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 computing applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for microprocessor reset in space- and power-constrained systems - targeting portable, automotive, and industrial embedded platforms requiring deterministic brownout response.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS20D2-T?
The MAX6385XS20D2-T has a factory-set nominal reset threshold of 2.0V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet (Rev 7, 8/20), where VTH min = 1.95V and max = 2.05V at +25°C, and ±2.5% applies across temperature.
Does MAX6385XS20D2-T support manual reset functionality, and how is it implemented?
Yes, MAX6385XS20D2-T includes a debounced manual reset input (MR) on Pin 3. It is active-low, features an internal 63kΩ pullup resistor to VCC, and requires no external components. Driving MR low forces reset assertion; release triggers the 20ms timeout period. This is explicitly documented in the Pin Description and Detailed Description sections of the MAX6381–MAX6390 datasheet.
What package type and dimensions does MAX6385XS20D2-T use?
MAX6385XS20D2-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant package is confirmed in the Ordering Information and Package Information sections of the datasheet, with "XS" in the part number denoting the 4-pin SC70 variant.
Can MAX6385XS20D2-T operate reliably at VCC below 1.8V?
Yes, MAX6385XS20D2-T guarantees correct reset output behavior down to VCC = 1.0V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Its supply current remains at 3μA minimum at 1.8V, and the reset output remains valid (logic-high when asserted) even at 1.0V - enabling robust operation during deep brownout conditions.
Is MAX6385XS20D2-T qualified for automotive applications?
Yes, MAX6385XS20D2-T is AEC-Q100 qualified for automotive use, as noted in the Features section and Ordering Information. While the standard "+T" suffix denotes lead-free/RoHS compliance, the underlying die and packaging meet AEC-Q100 Grade 1 requirements (–40°C to +125°C), confirmed in the datasheet's "AEC-Q100 Qualified" bullet and temperature range specification.
MAX6385XS20D2-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:
- 2V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS20D2-T FAQ
1.How can I place an order for MAX6385XS20D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS20D2-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 MAX6385XS20D2-T reliable?
The price and inventory of MAX6385XS20D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS20D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS20D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS20D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS20D2-T?
MAX6385XS20D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS20D2-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 MAX6385XS20D2-T?
For technical support, including MAX6385XS20D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS20D2-T requirements.
6.How does Aetrix verify that MAX6385XS20D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS20D2-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 MAX6385XS20D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS20D2-T?
All MAX6385XS20D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS20D2-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 MAX6385XS20D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS20D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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