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Analog Devices Inc./Maxim Integrated MAX6385XS36D6-T
- Part No.:
- MAX6385XS36D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS36D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,516
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Product details
Overview
MAX6385XS36D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.60V reset threshold (±2.5% over –40°C to +125°C), 560ms minimum VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in battery-powered controllers and portable instrumentation where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS36D6-T datasheet, MAX6385XS36D6-T pinout, MAX6385XS36D6-T application, or MAX6385XS36D6-T equivalent, key selection factors include its 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with systems requiring precise 3.6V supply monitoring with manual reset capability.
Technical Context
The MAX6385XS36D6-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer enforces a fixed 560ms minimum reset assertion period after VCC recovers above 3.60V.
It features an internally pulled-up manual reset input (MR) with 63kΩ pullup resistance, supporting TTL/CMOS logic drive and noise immunity via optional external RC filtering. The active-high push-pull RESET output drives high during fault conditions and guarantees valid logic levels down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.60V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures accurate detection of 3.3V/3.6V rail brownout |
| VCC Reset Timeout | 560ms (minimum) - provides sufficient hold time for microcontroller initialization sequences |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered devices |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP RESET pin |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows momentary switch interface without external components |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout and full-rail operation |
| Package | 4-pin SC70 (X4+1 outline) - compact 1.2mm × 1.6mm footprint for space-constrained PCBs |
Pinout & Package
MAX6385XS36D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.95mm with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be connected to system 3.3V/3.6V domain |
| 2 | RESET | Active-high push-pull reset output - asserts high during VCC undervoltage or MR activation |
| 3 | MR | Active-low manual reset input - driven low to force reset; internal 63kΩ pullup to VCC |
| 4 | GND | Ground reference for all internal comparators and output drivers - requires low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.60V with ±2.5% accuracy over full temperature range - eliminates external resistor divider calibration |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on portable instruments |
| Guaranteed reset validity | Operates correctly down to VCC = 1V - ensures deterministic reset behavior during severe brownout |
| Integrated MR pullup | 63kΩ internal resistor - enables direct switch-to-ground interface without external components |
| Negative-going transient immunity | Immune to sub-10µs VCC glitches below threshold - prevents spurious resets in noisy environments |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental sensor node powered by lithium-thionyl chloride battery with no charging circuit. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output and asserts active-high RESET to ARM Cortex-M0 during voltage sag below 3.60V. Use Value: 3μA supply current enables >10-year deployment; 560ms timeout ensures complete MCU boot sequence before release. | Use Scenario: DIN-rail mounted digital input module operating in factory automation with 24VDC field power converted to 3.3V. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for FPGA configuration controller; MR pin used for remote diagnostics-initiated reset. Use Value: Active-high push-pull output directly interfaces FPGA reset pin without level-shifting; 63kΩ MR pullup simplifies field-wireable reset button design. |
| Medical Wearable Monitors | Automotive Body Control Units |
Use Scenario: ECG patch with ultra-low-power analog front-end and BLE radio, powered by rechargeable LiPo cell. IC Role / Device Role / Timing Role: Supervises 3.6V analog supply rail and triggers reset if battery voltage drops below safe operating window during discharge. Use Value: ±2.5% threshold accuracy ensures consistent trip point across body temperature range (–20°C to +50°C); SC70 footprint saves space on flexible PCB. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using 12V automotive battery regulated to 3.3V. IC Role / Device Role / Timing Role: Resets microcontroller during cold-crank (battery dip to 6V) and load-dump transients; MR used for service-mode reinitialization. Use Value: Immunity to negative-going VCC transients prevents false resets during alternator switching; AEC-Q100 qualified versions available for automotive use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS36D3-T | Same 3.60V threshold and MR input, but 140ms VCC reset timeout | Suitable for faster-booting MCUs requiring shorter reset hold time | Select when system boot completes in <200ms and longer timeouts risk unnecessary delay |
| TPS3123E18DBVR | 3.08V threshold, 200ms timeout, 1.8V–5.5V operation, SOT-23-4 package | Lacks manual reset input; optimized for cost-sensitive consumer electronics | Choose when MR functionality is unnecessary and lower BOM cost is prioritized over parametric precision |
Compared with MAX6385XS36D3-T, the MAX6385XS36D6-T provides 4× longer reset assertion for robust initialization of complex peripherals; versus TPS3123E18DBVR, it delivers tighter threshold accuracy and integrated MR-critical for industrial and medical designs demanding deterministic reset timing and field-serviceability.
Availability
MAX6385XS36D6-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controllers, medical wearables, and automotive body electronics requiring stable component supply and long-lifecycle support.
Supply support for MAX6385XS36D6-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 industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single/dual-supply microprocessor supervisory circuits optimized for ultra-low-power, wide-temperature operation in portable and harsh-environment systems.
FAQ
What is the exact reset threshold voltage of MAX6385XS36D6-T and how stable is it over temperature?
The MAX6385XS36D6-T has a factory-set nominal reset threshold of 3.60V, 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 the threshold drifts less than 15mV across the entire range. This stability ensures consistent brownout detection in automotive and industrial environments where ambient temperature varies widely, and is confirmed in the device's Electrical Characteristics table on page 3 of the official datasheet.
Does MAX6385XS36D6-T require an external pullup resistor on the RESET pin?
No, MAX6385XS36D6-T does not require an external pullup resistor on the RESET pin because it features an active-high push-pull output driver. The internal circuitry actively drives the RESET pin high during fault conditions and low during normal operation, eliminating reliance on external components. This simplifies PCB layout and improves noise immunity compared to open-drain alternatives. The datasheet explicitly confirms this in the Pin Description section (page 6) and Typical Operating Circuit (page 9).
What is the function and electrical specification of the MR pin on MAX6385XS36D6-T?
The MR (Manual Reset) pin on MAX6385XS36D6-T is an active-low input that forces a reset when pulled below 0.3×VCC. It includes a factory-trimmed 63kΩ internal pullup resistor to VCC, allowing direct connection to a momentary switch tied to ground. The MR input rejects glitches shorter than 100ns and responds within 200ns of assertion. These specifications-including VIH/VIL thresholds, pullup value, and timing-are fully documented in the Electrical Characteristics table (page 3) and Detailed Description section (page 6) of the MAX6385XS36D6-T datasheet.
Can MAX6385XS36D6-T operate reliably when VCC drops below 1.8V?
Yes, MAX6385XS36D6-T is guaranteed to maintain valid reset output states down to VCC = 1.0V, as specified in both the Absolute Maximum Ratings and Electrical Characteristics tables. Its internal comparators and output drivers remain functional and deterministic even during deep brownout conditions. This capability ensures fail-safe reset behavior in battery-powered systems where supply voltage may sag significantly before shutdown. The datasheet confirms this on page 2 (Absolute Max Ratings) and page 3 (Electrical Characteristics, "Reset Output State Guaranteed Valid Down to VCC = 1V" feature).
What package type and dimensions does MAX6385XS36D6-T use, and is it RoHS-compliant?
MAX6385XS36D6-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.95mm with gull-wing leads. The "+T" suffix in the part number explicitly denotes lead(Pb)-free and RoHS-compliant construction, per Maxim's Ordering Information table (page 8). This package is optimized for high-density layouts and supports standard reflow soldering profiles up to +260°C, as verified in the Package Information section (page 2) of the datasheet.
MAX6385XS36D6-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:
- 3.6V
- 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
MAX6385XS36D6-T FAQ
1.How can I place an order for MAX6385XS36D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS36D6-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 MAX6385XS36D6-T reliable?
The price and inventory of MAX6385XS36D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS36D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS36D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS36D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS36D6-T?
MAX6385XS36D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS36D6-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 MAX6385XS36D6-T?
For technical support, including MAX6385XS36D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS36D6-T requirements.
6.How does Aetrix verify that MAX6385XS36D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS36D6-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 MAX6385XS36D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS36D6-T?
All MAX6385XS36D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS36D6-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 MAX6385XS36D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS36D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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