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Analog Devices Inc./Maxim Integrated MAX6385XS20D3-T
- Part No.:
- MAX6385XS20D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS20D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
MAX6385XS20D3-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.0V reset threshold, 140ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in battery-powered microcontroller systems requiring reliable power-on reset and field-serviceable manual reset.
For engineers reviewing the MAX6385XS20D3-T datasheet, MAX6385XS20D3-T pinout, MAX6385XS20D3-T application, or MAX6385XS20D3-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR internal pullup resistance (63kΩ), open-drain vs. push-pull output compatibility, and SC70-4 package footprint constraints.
Technical Context
The MAX6385XS20D3-T implements a precision bandgap-based voltage comparator for VCC monitoring and a monostable timer for fixed 140ms reset assertion after VCC recovery. Its MR input features internal 63kΩ pullup and 1µs minimum pulse width support, enabling direct connection to momentary switches without external components.
It uses BiCMOS process technology to achieve 3μA supply current at +1.8V while maintaining ±2.5% reset threshold accuracy across −40°C to +125°C and guaranteeing correct RESET logic state down to VCC = 1V - critical for brownout resilience in portable embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V (factory-set, ±2.5% over −40°C to +125°C) - ensures deterministic reset initiation during 2.0V rail brownout |
| VCC Reset Timeout | 140ms (minimum) - holds μP in reset long enough for stable clock and supply settling post-power-up |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT endpoints |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup when using momentary switch to GND |
| Operating Voltage | +1.0V to +5.5V - supports valid reset assertion even during deep brownout (down to 1V) |
| Output Type | Active-high push-pull - drives high-impedance μP reset pin directly without external pullup |
| Temp Range | −40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6385XS20D3-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 - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - asserts high during fault; deasserts low after timeout |
| 3 | MR | Active-low manual reset input - pulled high internally (63kΩ); drive low to force reset |
| 4 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.0V threshold | Eliminates external resistor divider and calibration effort for 2.0V rail supervision |
| 140ms guaranteed reset timeout | Meets JEDEC JESD8-12B timing requirements for 32-bit microcontrollers on 3.3V/2.5V rails |
| Debounced MR with internal pullup | Supports direct mechanical switch interface without RC filter or firmware debounce overhead |
| Valid operation down to VCC = 1V | Prevents spurious release of reset during severe brownout, ensuring deterministic μP initialization |
| −40°C to +125°C operation | Enables deployment in automotive engine control units and industrial motor drives without derating |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 2.0V LDO output powering ARM Cortex-M0+ MCU; asserts RESET until 2.0V rail stabilizes post-wake-up. Use Value: 3μA quiescent current extends battery life beyond 3 years; 140ms timeout ensures full ADC reference settling before firmware execution. | Use Scenario: DIN-rail mounted analog input module operating in factory ambient up to +70°C. IC Role / Device Role / Timing Role: Monitors isolated 2.0V digital supply feeding FPGA configuration memory and I²C peripherals. Use Value: ±2.5% threshold accuracy prevents false resets during thermal drift; MR pin allows field technician to initiate cold reboot via front-panel button. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: BCM sub-module managing door lock actuators, powered from 2.0V domain derived from 12V battery via buck converter. IC Role / Device Role / Timing Role: Provides AEC-Q100–compliant reset signaling to Infineon AURIX TC2xx MCU during cold-crank voltage sag. Use Value: Valid reset assertion down to VCC = 1V prevents MCU latch-up during 6V battery dips; SC70-4 footprint minimizes PCB area in dense CAN node layout. | Use Scenario: Revenue-grade meter with dual-supply architecture: 2.0V for metrology ASIC, 3.3V for RF SoC. IC Role / Device Role / Timing Role: Dedicated supervisor for 2.0V metrology rail, independent of main SoC reset chain. Use Value: 140ms timeout aligns with metrology ADC startup sequence; push-pull output avoids contention with shared reset bus driven by other supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS20D3+T | Same electrical specs; lead-free (RoHS) marking only - no functional difference | No change in use case or layout; identical performance and qualification | Select when RoHS compliance is required and +T suffix is specified in BOM |
| TPS3123E18DBVR | 2.0V threshold, 200ms timeout, 1.8V min VCC, but no MR input and SOT-23-5 package | Lacks manual reset capability; requires PCB redesign due to 5-pin SOT-23 footprint and different pinout | Choose only if MR is unused and board space allows SOT-23-5; not drop-in compatible |
Compared with MAX6385XS20D3-T, the MAX6385XS20D3+T offers identical functionality with RoHS-only differentiation, while TPS3123E18DBVR omits MR and demands layout changes - making MAX6385XS20D3-T optimal for MR-requiring, space-constrained designs.
Availability
MAX6385XS20D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control modules, and smart energy meters requiring stable component supply and long-term production continuity.
Supply support for MAX6385XS20D3-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 reset supervisors targeting battery-operated and thermally demanding embedded systems where reliability and minimal footprint are essential.
FAQ
What is the exact reset threshold voltage of the MAX6385XS20D3-T?
The MAX6385XS20D3-T has a factory-set reset threshold of 2.0V, with guaranteed accuracy of ±2.5% over the full temperature range (−40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The "20" in the part number explicitly denotes the 2.0V threshold per Maxim's ordering convention.
Does the MAX6385XS20D3-T support manual reset, and how is it implemented?
Yes, the MAX6385XS20D3-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, so the pin remains high when unconnected. Driving MR low (e.g., via a momentary switch to GND) forces an immediate reset assertion for the full 140ms timeout period. No external components are needed for basic operation.
What package type and dimensions does the MAX6385XS20D3-T use?
The MAX6385XS20D3-T is supplied in a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. It is RoHS-compliant ("+T" suffix), with a standard land pattern (90-0187) optimized for reflow soldering on multilayer PCBs. This compact footprint supports high-density layouts in portable and automotive electronics.
Can the MAX6385XS20D3-T operate reliably during deep brownout conditions?
Yes, the MAX6385XS20D3-T guarantees correct RESET output logic state down to VCC = 1.0V, enabling robust operation during severe brownout events. Its internal circuitry remains functional and asserts reset appropriately even as supply voltage collapses - a key advantage over supervisors that fail silently below 1.5V.
Is the MAX6385XS20D3-T qualified for automotive applications?
The MAX6385XS20D3-T is rated for −40°C to +125°C operation and is AEC-Q100 qualified (per datasheet note), making it suitable for automotive body electronics and infotainment subsystems. However, it carries the standard "+T" RoHS suffix, not the "/V" automotive trim version - confirm qualification status with Maxim/Analog Devices for safety-critical deployments.
MAX6385XS20D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS20D3-T FAQ
1.How can I place an order for MAX6385XS20D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS20D3-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 MAX6385XS20D3-T reliable?
The price and inventory of MAX6385XS20D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS20D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS20D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS20D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS20D3-T?
MAX6385XS20D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS20D3-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 MAX6385XS20D3-T?
For technical support, including MAX6385XS20D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS20D3-T requirements.
6.How does Aetrix verify that MAX6385XS20D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS20D3-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 MAX6385XS20D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS20D3-T?
All MAX6385XS20D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS20D3-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 MAX6385XS20D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS20D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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