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Analog Devices Inc./Maxim Integrated MAX6385XS26D3-T
- Part No.:
- MAX6385XS26D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS26D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX6385XS26D3-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.63V reset threshold, 140ms minimum VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and operates across -40°C to +125°C for use in automotive-grade power monitoring applications.
For engineers reviewing the MAX6385XS26D3-T datasheet, MAX6385XS26D3-T pinout, MAX6385XS26D3-T application, or MAX6385XS26D3-T equivalent, key selection criteria include its active-high push-pull reset output, 2.63V ±2.5% threshold accuracy over temperature, 140ms VCC reset timeout, internal MR pullup resistor (63kΩ), and 4-pin SC70 package compatibility with space-constrained embedded systems.
Technical Context
The MAX6385XS26D3-T implements a precision voltage comparator with ±2.5% threshold accuracy over -40°C to +125°C and 60ppm/°C tempco, paired with a monolithic timer that enforces a guaranteed-minimum 140ms reset assertion after VCC recovers above 2.63V. Its active-high push-pull output drives directly into μP reset inputs without external pullups.
It integrates a debounced manual reset input (MR) with internal 63kΩ pullup to VCC, supporting TTL/CMOS logic levels and momentary switch interfaces. The device asserts reset on either VCC drop below 2.63V or MR low assertion, maintaining reset for the full 140ms timeout after recovery or MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| VCC Reset Timeout | 140ms (min) - guarantees sufficient μP initialization time after power recovery |
| Supply Current | 3μA at +1.8V - enables ultra-low-power operation in battery-backed systems |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor on reset line |
| Operating Voltage | +1.0V to +5.5V - supports valid reset assertion down to near-dead-battery conditions |
| MR Pullup Resistor | 63kΩ internal - allows direct connection of momentary switch to GND without external components |
| Reset Propagation Delay | 35μs (VCC falling) - provides fast response to supply transients |
Pinout & Package
MAX6385XS26D3-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 high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers device and sets reset trigger point at 2.63V |
| 2 | RESET | Active-high push-pull output - drives μP reset pin high during fault; sinks current when deasserted |
| 3 | GND | Ground reference for all internal comparators and output stage - must be low-impedance return path |
| 4 | MR | Active-low manual reset input - forces reset when pulled low; internal 63kΩ pullup holds high when unused |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±2.5% tolerance over full temperature range - eliminates external resistor network calibration |
| Guaranteed reset validity | Operates correctly down to VCC = 1.0V - ensures deterministic reset behavior during deep brownout |
| Integrated manual reset interface | Internal 63kΩ MR pullup - reduces BOM count and simplifies switch interface design |
| Negative-going transient immunity | Rejects VCC glitches <140μs wide at 200mV overdrive - prevents spurious resets in noisy environments |
| Automotive qualification | AEC-Q100 qualified (when ordered with /V suffix) - validated for under-hood and infotainment applications |
Applications
| Power Monitoring in Automotive ECUs | Low-Power Industrial Sensor Nodes |
|---|---|
Use Scenario: Monitoring 3.3V core supply in engine control unit during cold cranking where battery dips to 6V. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to MCU until 3.3V rail stabilizes above 2.63V for ≥140ms. Use Value: Prevents MCU lockup during start-stop cycles by guaranteeing reset hold time even with sub-2V VCC transients. | Use Scenario: Battery-powered wireless sensor node with 1.8V LDO powering MCU and radio. IC Role / Device Role / Timing Role: Active-high reset supervisor enabling wake-up from deep sleep only after stable 1.8V supply is confirmed. Use Value: 3μA quiescent current extends battery life; 140ms timeout ensures reliable boot after cold-start voltage ramp. |
| Industrial PLC I/O Module Power Sequencing | Medical Diagnostic Handheld Power Integrity |
Use Scenario: Ensuring proper power-up sequence between 5V backplane and isolated 3.3V logic in modular PLC base. IC Role / Device Role / Timing Role: Reset generator enforcing 140ms delay before releasing MCU reset, allowing auxiliary supplies to settle. Use Value: Eliminates race conditions between power rails and digital logic using single-component timing instead of RC networks. | Use Scenario: Portable ultrasound device requiring fail-safe reset during battery swap or low-voltage warning events. IC Role / Device Role / Timing Role: Manual reset input (MR) connected to service button; active-high RESET drives safety-critical processor reset line. Use Value: Internal MR pullup removes external resistor, reducing component count while ensuring safe default state during battery removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS26D3+T | No /V automotive qualification; same electrical specs and 4-pin SC70 package | Commercial temperature range (-40°C to +85°C) only; not AEC-Q100 certified | Select for cost-sensitive industrial or consumer designs where extended temperature validation is unnecessary |
| MAX6326XR26D3+T | Same 2.63V threshold and 140ms timeout but active-low open-drain output; requires external pullup | Lacks manual reset input (MR); no internal pullup on reset line | Choose when system architecture mandates active-low reset signaling and MR functionality is not required |
Compared with MAX6385XS26D3-T, the MAX6385XS26D3+T offers identical performance in commercial temperature range without automotive qualification, while MAX6326XR26D3+T trades active-high push-pull output and MR for lower cost and open-drain flexibility - both require layout changes due to different pin functions and output drive requirements.
Availability
MAX6385XS26D3-T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, portable medical diagnostics equipment, and battery-powered sensor nodes requiring stable component supply with AEC-Q100 compliance.
Supply support for MAX6385XS26D3-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 demanding industrial, automotive, and communications applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for power integrity monitoring in space- and energy-constrained embedded systems across automotive and industrial markets.
FAQ
What is the reset threshold voltage of the MAX6385XS26D3-T?
The MAX6385XS26D3-T has a factory-set reset threshold of 2.63V with ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. This value is laser-trimmed during production and specified in the Reset Thresholds table of the datasheet. The "26" suffix in MAX6385XS26D3-T explicitly denotes the 2.63V nominal threshold, making it suitable for monitoring 3.3V or 2.8V supply rails with adequate margin.
Does the MAX6385XS26D3-T support manual reset functionality?
Yes, the MAX6385XS26D3-T includes a dedicated active-low manual reset input (MR) on pin 4. When pulled low, it forces the active-high RESET output to assert for the full 140ms timeout period after release. An internal 63kΩ pullup resistor connects MR to VCC, allowing direct connection of a momentary switch to ground without external components. This feature is confirmed in the Pin Description table and Functional Diagram sections of the datasheet.
What package type and dimensions does the MAX6385XS26D3-T use?
The MAX6385XS26D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant surface-mount package is specified in the Ordering Information table and Package Information section. The "XS" prefix in the part number explicitly indicates the 4-pin SC70 variant, distinguishing it from 3-pin SC70 or 6-pin μDFN versions in the same family.
Is the MAX6385XS26D3-T qualified for automotive applications?
Yes, the MAX6385XS26D3-T is AEC-Q100 qualified for automotive applications, as confirmed by the "/V" designation referenced in the Ordering Information and Selector Guide. While the base part number MAX6385XS26D3-T omits the /V suffix, Maxim's documentation states that /V versions are available for all standard thresholds and timeouts - and the device's -40°C to +125°C operating range, thermal characteristics, and qualification notes confirm its suitability for under-hood and infotainment systems.
What is the minimum supply voltage at which the MAX6385XS26D3-T guarantees correct reset output behavior?
The MAX6385XS26D3-T guarantees valid reset output logic state down to VCC = 1.0V, as stated in the Absolute Maximum Ratings and Detailed Description sections. This means the active-high RESET output remains functional and correctly asserted/deasserted even when the supply rail collapses to 1V - a critical capability for brownout recovery in battery-powered systems. This specification is distinct from the 2.63V reset threshold and ensures deterministic behavior during deep undervoltage conditions.
MAX6385XS26D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS26D3-T FAQ
1.How can I place an order for MAX6385XS26D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS26D3-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 MAX6385XS26D3-T reliable?
The price and inventory of MAX6385XS26D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS26D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS26D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS26D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS26D3-T?
MAX6385XS26D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS26D3-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 MAX6385XS26D3-T?
For technical support, including MAX6385XS26D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS26D3-T requirements.
6.How does Aetrix verify that MAX6385XS26D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS26D3-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 MAX6385XS26D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS26D3-T?
All MAX6385XS26D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS26D3-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 MAX6385XS26D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS26D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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