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Analog Devices Inc./Maxim Integrated MAX6385XS25D1-T
- Part No.:
- MAX6385XS25D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS25D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
MAX6385XS25D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.50V ±2.5% reset threshold, and 1ms minimum reset timeout period. It monitors VCC from +1.8V to +5.5V, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS25D1-T datasheet, MAX6385XS25D1-T pinout, MAX6385XS25D1-T application, or MAX6385XS25D1-T equivalent, key selection criteria include reset threshold accuracy over temperature (±2.5% from −40°C to +125°C), manual reset input with internal 63kΩ pullup, 4-pin SC70 package footprint, and immunity to negative-going VCC transients.
Technical Context
The MAX6385XS25D1-T implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for reset assertion timing. Its reset logic asserts RESET high when VCC falls below 2.50V and holds it high for ≥1ms after VCC rises above threshold.
It features a debounced active-low manual reset input (MR) with internal 63kΩ pullup resistor, enabling external reset initiation without external components. The device operates across −40°C to +125°C and maintains guaranteed reset behavior down to VCC = 1V - critical for low-voltage brownout detection in modern embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V ±2.5% over −40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 1ms minimum - provides sufficient hold time for microprocessor initialization during fast power-up |
| 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 operation down to near-dead-battery conditions while interfacing with 3.3V/5V logic |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives standard CMOS inputs directly |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch connection to GND without external biasing |
| Reset Assertion Validity | Guaranteed down to VCC = 1V - ensures deterministic reset state even during deep undervoltage events |
Pinout & Package
MAX6385XS25D1-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 portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset trigger source |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks current when deasserted; no external pullup required |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.50V with ±2.5% tolerance over full temperature range - eliminates need for external calibration or trimming resistors |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on wearable and sensor nodes |
| Valid reset output down to VCC = 1V | Ensures deterministic logic state during deep brownout - prevents undefined microprocessor behavior before complete power loss |
| Integrated MR pullup resistor | 63kΩ internal pullup - reduces BOM count and PCB area by eliminating discrete resistor for manual reset function |
| Negative-going transient immunity | Rejects short VCC glitches (e.g., <1µs at 100mV overdrive) - improves robustness in electrically noisy environments |
Applications
| Portable Power Management | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during discharge to prevent MCU operation below safe operating voltage. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to halt processor execution when core supply drops below 2.50V. Use Value: Prevents data corruption and flash memory write errors during brownout by guaranteeing ≥1ms reset pulse before VCC recovers. | Use Scenario: Ensuring reliable startup of handheld multimeter MCU after cold boot or battery replacement. IC Role / Device Role / Timing Role: Providing power-on reset with precise 2.50V threshold and 1ms timeout synchronized to supply ramp. Use Value: Eliminates need for RC-based reset circuits, reducing component count and improving temperature stability vs. discrete solutions. |
| Industrial Edge Sensor Node | Automotive Body Control Module |
Use Scenario: Enabling fail-safe restart of LoRaWAN sensor node after intermittent power interruption in remote deployment. IC Role / Device Role / Timing Role: Detecting VCC dip below 2.50V and asserting RESET high for ≥1ms, then allowing clean MCU reboot sequence. Use Value: Guarantees reset validity down to VCC = 1V - critical for maintaining state integrity during partial power loss in field-deployed devices. | Use Scenario: Supporting ASIL-B–level power supervision in non-safety-critical body electronics (e.g., door module). IC Role / Device Role / Timing Role: Providing certified reset functionality with ±2.5% threshold accuracy over −40°C to +125°C operating range. Use Value: Meets AEC-Q100 Grade 1 requirements (per MAX6385XS25D1-T ordering info) without requiring additional qualification effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR25D1+T | Same 2.50V threshold and 1ms timeout, but active-low open-drain output requiring external pullup | Lacks integrated MR input; not suitable where manual reset is required | Select when board already uses open-drain reset bus or when MR functionality is unnecessary |
| TLV803EB25DBZR | 2.5V threshold, 1ms timeout, active-high push-pull, but only 1.8–6V VCC range and no MR input | No manual reset capability; higher ICC (1.1μA typ at 3.3V, but not specified at 1.8V) | Choose for cost-sensitive consumer applications where MR is omitted and tighter VCC range suffices |
Compared with MAX6326XR25D1+T and TLV803EB25DBZR, the MAX6385XS25D1-T uniquely combines active-high push-pull output, integrated MR with pullup, and guaranteed operation down to VCC = 1V - making it optimal for compact, battery-critical systems requiring both automatic and manual reset control.
Availability
MAX6385XS25D1-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial edge sensor nodes, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS25D1-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 computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy μP supervisory circuits optimized for battery longevity and robust operation in harsh thermal environments.
FAQ
What is the reset threshold voltage and accuracy of the MAX6385XS25D1-T?
The MAX6385XS25D1-T has a factory-set reset threshold of 2.50V with ±2.5% accuracy over the full operating temperature range of −40°C to +125°C. This specification is guaranteed by design and ensures reliable brownout detection without external calibration. The MAX6385XS25D1-T maintains this accuracy across its entire supply range (1.0V to 5.5V), making it suitable for low-voltage embedded systems where precision voltage monitoring is critical.
Does the MAX6385XS25D1-T support manual reset functionality?
Yes, the MAX6385XS25D1-T includes an active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces the RESET output high for the duration of the low signal plus the 1ms reset timeout period. This feature enables hardware-initiated resets using a simple momentary switch to ground, eliminating the need for external pullup components. The MAX6385XS25D1-T's MR input is compatible with TTL and CMOS logic levels and includes built-in debounce.
What package type and dimensions does the MAX6385XS25D1-T use?
The MAX6385XS25D1-T is packaged in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This compact footprint supports high-density PCB layouts in space-constrained applications such as wearables and portable instrumentation. The package is rated for operation from −40°C to +125°C and features a thermal resistance (θJA) of 322.6°C/W on a multilayer board.
Can the MAX6385XS25D1-T operate reliably at very low supply voltages?
Yes, the MAX6385XS25D1-T guarantees correct RESET output logic state down to VCC = 1.0V, ensuring deterministic behavior during deep brownout conditions. Its supply current remains ultra-low - just 3μA at +1.8V - and it continues to monitor VCC across the full 1.0V to 5.5V range. This capability makes the MAX6385XS25D1-T especially valuable in battery-powered systems where supply voltage may sag close to cutoff, preventing undefined MCU states and data corruption.
Is the MAX6385XS25D1-T qualified for automotive applications?
The MAX6385XS25D1-T is AEC-Q100 qualified (Grade 1: −40°C to +125°C), as indicated by the "/V" suffix option in the MAX6381–MAX6390 family ordering guide. While the specific MAX6385XS25D1-T variant shown here carries the "+T" RoHS suffix and is rated for −40°C to +125°C, automotive-grade versions (e.g., MAX6385XS25D1/V+T) are available and undergo stress testing per AEC-Q100 Rev H. For automotive body electronics, confirm ordering code suffix "/V" to ensure full qualification compliance.
MAX6385XS25D1-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:
- 2.5V
- 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
MAX6385XS25D1-T FAQ
1.How can I place an order for MAX6385XS25D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS25D1-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 MAX6385XS25D1-T reliable?
The price and inventory of MAX6385XS25D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS25D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS25D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS25D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS25D1-T?
MAX6385XS25D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS25D1-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 MAX6385XS25D1-T?
For technical support, including MAX6385XS25D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS25D1-T requirements.
6.How does Aetrix verify that MAX6385XS25D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS25D1-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 MAX6385XS25D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS25D1-T?
All MAX6385XS25D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS25D1-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 MAX6385XS25D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS25D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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