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Analog Devices Inc./Maxim Integrated MAX6385XS40D1-T
- Part No.:
- MAX6385XS40D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS40D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
MAX6385XS40D1-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 4.0V reset threshold, 1ms minimum reset timeout, and manual reset input (MR). It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS40D1-T datasheet, MAX6385XS40D1-T pinout, MAX6385XS40D1-T application, or MAX6385XS40D1-T equivalent, key selection factors include its 4.0V ±2.5% threshold accuracy over -40°C to +125°C, 1ms reset timeout, MR debounce capability, SC70-4 package footprint, and compatibility with dual-voltage systems requiring precise VCC supervision.
Technical Context
The MAX6385XS40D1-T implements a precision voltage comparator with internal 4.0V reference and an on-chip timer that asserts RESET high for ≥1ms after VCC rises above the threshold. Its MR input features an internal 63kΩ pullup resistor and guarantees reset assertion during manual trigger with 1μs minimum pulse width and 100ns glitch rejection.
It operates across full industrial temperature range (-40°C to +125°C) with ±2.5% reset threshold accuracy and supports stable reset behavior down to VCC = 1V. The active-high push-pull output drives high (VOH ≥ 0.8×VCC) when asserted and low (VOL ≤ 0.3V) when deasserted, eliminating need for external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.0V ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial environments |
| Reset Timeout | 1ms (min) - provides sufficient hold time for microprocessor initialization without excessive delay |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Output Type | Active-high push-pull - eliminates external pullup resistor and simplifies interface to CMOS inputs |
| Manual Reset | MR with 63kΩ internal pullup - allows direct switch-to-GND connection without external components |
| Operating Voltage | +1.0V to +5.5V - supports valid reset state even during deep brownout down to 1V rail collapse |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6385XS40D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.95mm with gull-wing leads.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be connected to system VCC for reset generation |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks current when deasserted |
| 3 | MR | Active-low manual reset input - pulled high internally; logic low forces immediate reset assertion |
| 4 | GND | Ground reference for all internal comparators and output drivers - requires low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.0V threshold | ±2.5% accuracy over full temperature range eliminates need for external calibration or trimming |
| 1ms minimum reset timeout | Guarantees sufficient processor hold time for reliable boot sequence in low-latency embedded systems |
| Integrated MR pullup resistor | 63kΩ internal pullup enables direct momentary switch interface without external bias components |
| Valid operation down to VCC = 1V | Ensures deterministic reset state during severe brownout, preventing undefined MCU behavior |
| SC70-4 package | 1.6mm × 1.6mm footprint reduces PCB area by >50% vs. SOIC-8 while maintaining hand-solderability |
Applications
| Portable/Battery-Powered Equipment | Critical μP and μC Power Monitoring |
|---|---|
Use Scenario: Wearable health monitor powered by single Li-ion cell with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers hard reset if voltage drops below 4.0V during peak current draw. Use Value: Prevents firmware crash due to undervoltage execution; 1ms timeout ensures full CPU register reset before restart. | Use Scenario: Industrial PLC controller with dual 5V/3.3V rails where 5V rail powers FPGA and 3.3V powers ARM Cortex-M7. IC Role / Device Role / Timing Role: Monitors 5V rail only; asserts active-high RESET to halt CPU until stable 5V is restored post-brownout. Use Value: Eliminates need for external level-shifter since active-high output directly interfaces with 3.3V-tolerant reset input. |
| Computers | Controllers |
Use Scenario: Embedded edge AI gateway using low-power SoC with strict power sequencing requirements. IC Role / Device Role / Timing Role: Provides primary power-on reset signal synchronized to 4.0V VCC ramp; MR pin enables remote firmware recovery via GPIO. Use Value: Internal MR debounce removes need for external RC filter, reducing BOM count and layout complexity. | Use Scenario: HVAC zone controller operating in unconditioned environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Guarantees reset assertion across -40°C to +125°C with ±2.5% threshold stability - critical for fail-safe motor shutdown. Use Value: AEC-Q100 qualified variant available; this part shares same thermal and electrical specs for industrial deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS40D2-T | Same 4.0V threshold and MR function, but 20ms reset timeout (vs. 1ms) | Suitable for systems requiring longer reset hold time, e.g., FPGAs with slow configuration clocks | Select only if extended timeout is required; not drop-in compatible due to timing mismatch |
| TPS3808G33DBVR | 3.3V fixed threshold (not 4.0V); 200ms timeout; no MR input; SOT-23-5 package | Designed for 3.3V-only systems; lacks manual reset capability and SC70-4 footprint | Use only when threshold and package constraints permit; requires layout change and firmware validation |
Compared with MAX6385XS40D1-T, the D2-T variant trades shorter reset latency for longer hold time, while TPS3808G33DBVR offers lower cost in high-volume 3.3V applications but sacrifices design flexibility, MR support, and compact packaging.
Availability
MAX6385XS40D1-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical μP and μC power monitoring, and controllers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS40D1-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 reliability and low-power operation.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for space-constrained, battery-sensitive systems requiring robust reset functionality across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6385XS40D1-T and how stable is it over temperature?
The MAX6385XS40D1-T has a factory-set nominal reset threshold of 4.0V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This means the actual threshold remains between 3.90V and 4.10V across all conditions, ensuring consistent brownout detection in automotive and industrial environments where voltage rails fluctuate with load and temperature.
Does MAX6385XS40D1-T require an external pullup resistor on the RESET pin?
No, MAX6385XS40D1-T does not require an external pullup resistor because it features an active-high push-pull RESET output. The internal driver sources current when asserted (high) and sinks current when deasserted (low), providing full rail-to-rail logic levels compatible with standard CMOS inputs without external components.
What is the function and electrical behavior of the MR pin on MAX6385XS40D1-T?
The MR pin on MAX6385XS40D1-T is an active-low manual reset input with an internal 63kΩ pullup resistor to VCC. Driving MR low forces immediate RESET assertion; release triggers the 1ms timeout period. It accepts TTL/CMOS logic levels, supports 1μs minimum pulse width, and rejects 100ns glitches - enabling direct switch or GPIO connection without external debounce circuitry.
Can MAX6385XS40D1-T operate reliably when VCC drops below 1.8V?
Yes, MAX6385XS40D1-T guarantees correct RESET output state down to VCC = 1.0V, per its Absolute Maximum Ratings and Electrical Characteristics table. While supply current increases slightly below 1.8V, the device continues to monitor VCC and assert RESET appropriately during deep brownout events, making it suitable for applications with collapsing battery rails.
What package type and dimensions does MAX6385XS40D1-T use, and is it RoHS-compliant?
MAX6385XS40D1-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.95mm. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact gull-wing package supports reflow soldering and is widely supported by automated assembly lines.
MAX6385XS40D1-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:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS40D1-T FAQ
1.How can I place an order for MAX6385XS40D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS40D1-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 MAX6385XS40D1-T reliable?
The price and inventory of MAX6385XS40D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS40D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS40D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS40D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS40D1-T?
MAX6385XS40D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS40D1-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 MAX6385XS40D1-T?
For technical support, including MAX6385XS40D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS40D1-T requirements.
6.How does Aetrix verify that MAX6385XS40D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS40D1-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 MAX6385XS40D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS40D1-T?
All MAX6385XS40D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS40D1-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 MAX6385XS40D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS40D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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