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Analog Devices Inc./Maxim Integrated MAX6385XS19D4-T
- Part No.:
- MAX6385XS19D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS19D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,245
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Product details
Overview
MAX6385XS19D4-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.9V reset threshold (±2.5% over -40°C to +125°C), 1120ms VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS19D4-T datasheet, MAX6385XS19D4-T pinout, MAX6385XS19D4-T application, or MAX6385XS19D4-T equivalent, key selection factors include its 1.9V threshold accuracy, guaranteed reset validity down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with manual reset switch interfaces requiring no external debounce.
Technical Context
The MAX6385XS19D4-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance across -40°C to +125°C and integrates a monolithic timer for fixed 1120ms reset assertion after VCC recovery. Its MR input features an internal 63kΩ pullup resistor and accepts TTL/CMOS logic levels.
This device operates from 1.0V to 5.5V supply, draws only 3μA at 1.8V, and guarantees correct reset output state down to VCC = 1V - enabling robust operation during deep brownout conditions. The active-high push-pull RESET output drives high during fault and deasserts low after timeout without requiring external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.90V nominal, ±2.5% over -40°C to +125°C - ensures accurate detection of 1.8V system rail undervoltage |
| VCC Reset Timeout | 1120ms minimum - provides sufficient hold-off time for slow-ramping power supplies and processor initialization |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in portable and IoT edge devices |
| Operating Voltage Range | 1.0V to 5.5V - supports operation through full discharge of single-cell Li-ion or coin-cell batteries |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset input |
| Manual Reset Input | MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external components |
| Temperature Range | -40°C to +125°C - qualified for automotive under-hood and industrial control applications |
Pinout & Package
MAX6385XS19D4-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 space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset threshold reference |
| 2 | RESET | Active-high push-pull output - asserts high during VCC undervoltage or MR activation; sinks/source current per spec |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup enables switch-to-GND implementation with no external parts |
| 4 | GND | Analog and digital ground reference - must be connected to system ground plane for stable reset timing and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.9V reset threshold | Eliminates external resistor divider and calibration effort for 1.8V core rail monitoring |
| 1120ms VCC reset timeout | Meets JEDEC JESD78 requirement for minimum reset pulse width in microcontroller boot sequences |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing partial execution or latch-up |
| Debounced MR input with internal pullup | Reduces BOM count by removing external RC network while rejecting <100ns glitches on manual reset line |
| Low 3μA supply current at 1.8V | Extends battery runtime in always-on sensor nodes and wearable devices without compromising reset reliability |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitors 1.8V FPGA configuration rail and 3.3V MCU core supply in programmable logic controller I/O expansion cards. IC Role / Device Role / Timing Role: Supervisory circuit providing synchronized power-on reset and brownout detection for dual-voltage domain system. Use Value: Prevents configuration corruption during cold cranking transients by asserting reset until both rails stabilize above 1.9V and 3.0V thresholds. |
Use Scenario: Embedded in door module ECU to supervise 1.8V microcontroller core voltage and detect battery voltage sag during start-stop cycles. IC Role / Device Role / Timing Role: Single-supply reset monitor with manual reset capability for service diagnostics and firmware recovery. Use Value: Guarantees safe MCU reset initiation within 1120ms of VCC recovery, meeting ISO 16750-2 transient immunity requirements. |
| Portable Medical Sensor Node | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Powers from CR2032 coin cell; monitors 1.8V ultra-low-power BLE SoC supply in continuous glucose monitor. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring valid reset during battery depletion down to 1.0V. Use Value: Enables >5-year battery life while maintaining reset integrity - 3μA ICC at 1.8V reduces average current by 60% vs. legacy supervisors. |
Use Scenario: Supervises 1.8V metrology ASIC and 3.3V communication MCU in ANSI C12.22-compliant smart meter design. IC Role / Device Role / Timing Role: Dual-role supervisor: automatic VCC monitoring and operator-initiated reset via front-panel button. Use Value: MR input with internal pullup eliminates discrete resistor, reducing component count and improving field-replaceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS19D3-T | 140ms VCC reset timeout (vs. 1120ms) | Suitable for fast-booting MCUs with minimal initialization delay requirements | Select when shorter reset hold-off is needed for real-time response-critical systems |
| TPS3123E19DBVR | 1.9V threshold, 200ms timeout, SOT-23-5 package, no MR input | Lacks manual reset functionality; requires external pullup for open-drain output | Choose if board space permits SOT-23-5 and manual reset is not required |
Compared with MAX6385XS19D4-T, the MAX6385XS19D3-T offers faster reset release but sacrifices margin for slow-ramping supplies, while the TPS3123E19DBVR trades MR integration and SC70 footprint for lower cost and higher production volume availability - making it suitable for cost-sensitive, non-diagnostic consumer designs.
Availability
MAX6385XS19D4-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical sensors, smart energy meters, and battery-powered edge AI gateways requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6385XS19D4-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 demanding industrial, automotive, and communications applications.
The MAX6381–MAX6390 family delivers ultra-low-power, AEC-Q100-qualified reset supervision for microprocessor-based systems operating across wide voltage and temperature ranges - targeting safety-critical and battery-constrained embedded platforms.
FAQ
What is the exact reset threshold voltage of MAX6385XS19D4-T and how stable is it over temperature?
The MAX6385XS19D4-T has a factory-set nominal reset threshold of 1.90V, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +125°C. This corresponds to a minimum threshold of 1.85V and maximum of 1.95V at temperature extremes, ensuring consistent detection of 1.8V rail collapse without false triggering.
Does MAX6385XS19D4-T support manual reset, and what is required to implement it?
Yes, MAX6385XS19D4-T includes a dedicated MR (manual reset) input with an internal 63kΩ pullup resistor. To implement manual reset, connect a normally open momentary switch between MR and GND. No external components are needed - the device handles debouncing internally, rejecting transients shorter than 100ns.
What is the reset timeout duration for MAX6385XS19D4-T, and is it configurable?
The MAX6385XS19D4-T provides a fixed 1120ms minimum reset timeout period after VCC rises above the 1.90V threshold. This value is factory-programmed and non-configurable - selected via the "D4" suffix in the part number. It meets JEDEC JESD78 requirements for reliable microprocessor initialization.
Can MAX6385XS19D4-T operate reliably at very low supply voltages?
Yes, MAX6385XS19D4-T guarantees correct reset output logic state down to VCC = 1.0V, and functions across a 1.0V to 5.5V supply range. Its active-high push-pull output remains valid during deep brownout, ensuring deterministic reset behavior even as the battery discharges below 1.2V.
What package type and footprint does MAX6385XS19D4-T use, and is it RoHS-compliant?
MAX6385XS19D4-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant, with standard reflow soldering profile compatibility up to +260°C peak temperature.
MAX6385XS19D4-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:
- 1.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS19D4-T FAQ
1.How can I place an order for MAX6385XS19D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS19D4-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 MAX6385XS19D4-T reliable?
The price and inventory of MAX6385XS19D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS19D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS19D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS19D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS19D4-T?
MAX6385XS19D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS19D4-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 MAX6385XS19D4-T?
For technical support, including MAX6385XS19D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS19D4-T requirements.
6.How does Aetrix verify that MAX6385XS19D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS19D4-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 MAX6385XS19D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS19D4-T?
All MAX6385XS19D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS19D4-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 MAX6385XS19D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS19D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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