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Analog Devices Inc./Maxim Integrated MAX6385XS38D6-T
- Part No.:
- MAX6385XS38D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS38D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,146
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Product details
Overview
MAX6385XS38D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.80V reset threshold (±2.5% over -40°C to +125°C), and 560ms minimum VCC reset timeout. It monitors single supply voltage in battery-powered or space-constrained embedded systems and guarantees valid reset state down to VCC = 1V.
For engineers reviewing the MAX6385XS38D6-T datasheet, MAX6385XS38D6-T pinout, MAX6385XS38D6-T application, or MAX6385XS38D6-T equivalent, key selection criteria include reset threshold accuracy, manual reset input compatibility, SC70-4 package footprint, low 3μA supply current at 1.8V, and guaranteed operation across automotive temperature range (-40°C to +125°C).
Technical Context
The MAX6385XS38D6-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over full temperature range and 60ppm/°C tempco. Its internal timer enforces a fixed 560ms minimum reset assertion period after VCC recovers above 3.80V.
It features a debounced active-low manual reset input (MR) with internal 63kΩ pullup resistor, enabling external reset initiation without external components. The active-high push-pull RESET output drives directly into μP reset inputs without external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.80V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection for 3.3V or 4.0V logic rails |
| VCC Reset Timeout | 560ms minimum - holds μP in reset long enough for power stabilization and oscillator startup |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout recovery |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor on reset line |
| Manual Reset Input | Active-low MR with 63kΩ internal pullup - allows momentary switch interface without external biasing |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6385XS38D6-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 high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers device and triggers reset when below 3.80V |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition; sinks/source up to 3.2mA/800µA |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Ground reference - completes power and signal return path; required for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.80V with ±2.5% tolerance over full automotive temperature range - eliminates external resistor divider calibration |
| Low quiescent current | 3μA at 1.8V - extends battery life in portable medical monitors and wireless sensor nodes |
| Guaranteed reset validity | Operates correctly down to VCC = 1.0V - ensures deterministic reset behavior during deep undervoltage events |
| Debounced manual reset | Internal MR filtering and 63kΩ pullup - enables direct connection to tactile switch without RC network |
| Negative-going transient immunity | Rejects VCC glitches ≤ 100µs at 200mV overdrive - prevents spurious resets in electrically noisy environments |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply in programmable logic controller I/O expansion cards exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M4 core during brownout or cold start. Use Value: 560ms timeout ensures stable clock lock and memory initialization before firmware execution resumes. |
Use Scenario: Embedded in door module ECU monitoring 5V system rail alongside LIN transceiver power domain. IC Role / Device Role / Timing Role: Resets MCU upon battery voltage sag below 3.80V during engine cranking. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents false resets in extreme under-hood conditions. |
| Portable Medical Glucose Meter | Smart Home Zigbee Sensor Node |
|
Use Scenario: Powers on from CR2032 coin cell; must guarantee clean reset during battery depletion and cold storage. IC Role / Device Role / Timing Role: Active-high push-pull reset driver interfacing directly with ultra-low-power MSP430F5xx MCU. Use Value: 3μA supply current at 1.8V enables >5-year shelf life with no standby drain penalty. |
Use Scenario: Battery-operated occupancy sensor using Nordic nRF52832 SoC, requiring robust reset during RF interference-induced supply noise. IC Role / Device Role / Timing Role: Detects negative VCC transients and suppresses reset pulses shorter than 100µs at 200mV amplitude. Use Value: Built-in glitch rejection eliminates need for additional ceramic decoupling beyond standard 100nF at VCC pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS38D3-T | 140ms VCC reset timeout vs. 560ms - shorter assertion period | Suitable for faster-booting MCUs where 140ms suffices for oscillator stabilization | Select when system boot time budget is constrained and shorter reset hold is acceptable |
| MAX6385XS38D4-T | 1120ms VCC reset timeout vs. 560ms - longer assertion period | Required for complex peripherals needing extended power-rail settling before release | Select when interfacing with DDR memory controllers or high-precision ADCs demanding longer reset hold |
Compared with MAX6385XS38D3-T and MAX6385XS38D4-T, the MAX6385XS38D6-T provides a balanced 560ms reset timeout - sufficient for most ARM Cortex-M and RISC-V microcontrollers to achieve clock lock and register initialization without unnecessarily delaying system startup.
Availability
MAX6385XS38D6-T is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, portable medical devices, and battery-powered IoT sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS38D6-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, sensing, and connectivity applications, with emphasis on high-reliability, low-power solutions.
The MAX6381–MAX6390 family delivers single/dual-supply microprocessor supervisory circuits optimized for space-constrained, battery-sensitive, and automotive-grade embedded systems requiring guaranteed reset behavior across harsh thermal and electrical environments.
FAQ
What is the exact reset threshold voltage of MAX6385XS38D6-T and how stable is it over temperature?
The MAX6385XS38D6-T has a factory-set nominal reset threshold of 3.80V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is limited to approximately ±15mV across the entire range - critical for consistent brownout response in automotive and industrial applications.
Does MAX6385XS38D6-T support manual reset, and what is the internal pullup value on the MR pin?
Yes, MAX6385XS38D6-T includes an active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. This allows direct connection to a normally open momentary switch without external components. The MR pin accepts TTL/CMOS logic levels and features built-in glitch rejection (100ns), making it robust against contact bounce and EMI.
What package type and dimensions does MAX6385XS38D6-T use, and is it RoHS-compliant?
MAX6385XS38D6-T is supplied in a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. Its small footprint supports high-density PCB layouts in wearables, sensor nodes, and compact ECUs.
How does the reset timeout of MAX6385XS38D6-T compare to other variants in the MAX6385 family?
MAX6385XS38D6-T provides a 560ms minimum VCC reset timeout, positioned between the 140ms (D3) and 1120ms (D4) options. This duration balances reliable power-rail stabilization with minimal boot delay - ideal for mid-complexity microcontrollers like STM32L4 or Silicon Labs EFM32 that require ~400–600ms for clock tree initialization and flash controller readiness.
Can MAX6385XS38D6-T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, MAX6385XS38D6-T guarantees correct reset output logic state down to VCC = 1.0V, ensuring deterministic behavior during deep brownout recovery. Its supply current remains only 3μA at 1.8V, and absolute maximum ratings allow VCC as low as -0.3V (with derating). This makes it suitable for energy-harvesting systems and battery-depleted scenarios where voltage may dip near 1V before recovery.
MAX6385XS38D6-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:
- 3.8V
- 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
MAX6385XS38D6-T FAQ
1.How can I place an order for MAX6385XS38D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS38D6-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 MAX6385XS38D6-T reliable?
The price and inventory of MAX6385XS38D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS38D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS38D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS38D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS38D6-T?
MAX6385XS38D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS38D6-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 MAX6385XS38D6-T?
For technical support, including MAX6385XS38D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS38D6-T requirements.
6.How does Aetrix verify that MAX6385XS38D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS38D6-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 MAX6385XS38D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS38D6-T?
All MAX6385XS38D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS38D6-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 MAX6385XS38D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS38D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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