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Analog Devices Inc./Maxim Integrated MAX6385XS18D3-T
- Part No.:
- MAX6385XS18D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS18D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
MAX6385XS18D3-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 1.8V reset threshold, 140ms minimum VCC reset timeout, and manual reset input (MR), designed for reliable power-on reset assertion in low-voltage embedded systems operating from 1.0V to 5.5V supply. It consumes only 3μA at +1.8V and guarantees valid reset output down to VCC = 1V.
For engineers reviewing the MAX6385XS18D3-T datasheet, MAX6385XS18D3-T pinout, MAX6385XS18D3-T application, or MAX6385XS18D3-T equivalent, this page delivers verified specifications, SC70-4 package layout, MR debounce capability, ±2.5% threshold accuracy over –40°C to +125°C, and direct alternatives for voltage-monitoring reset design.
Technical Context
The MAX6385XS18D3-T integrates a precision voltage comparator monitoring VCC against a fixed 1.8V threshold, an internal timer enforcing a guaranteed-minimum 140ms reset assertion after VCC recovery, and a debounced manual reset input with 63kΩ internal pullup. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly upon recovery.
It operates across the full industrial temperature range (–40°C to +125°C) with ±2.5% reset threshold accuracy and supports stable reset generation even during negative-going VCC transients up to 35µs (at 100mV overdrive), ensuring immunity to common supply noise without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.8V nominal, ±2.5% over –40°C to +125°C - ensures accurate brownout detection for 1.8V logic domains. |
| VCC Reset Timeout | 140ms minimum - guarantees sufficient μP initialization time after power stabilization. |
| Supply Current | 3μA at +1.8V - enables use in battery-powered equipment with multi-year standby life. |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset inputs. |
| Manual Reset Input | MR with 63kΩ internal pullup - supports momentary switch connection without external components. |
| Operating Voltage Range | 1.0V to 5.5V - allows operation down to near-dead-battery levels while maintaining valid reset state. |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during deep undervoltage events. |
Pinout & Package
MAX6385XS18D3-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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source - must be decoupled with 0.1µF capacitor near pin. |
| 2 | RESET | Active-high push-pull reset output - asserts high during VCC undervoltage or MR activation; sinks/source current per spec. |
| 3 | GND | Ground reference for all internal circuitry and reset comparator - requires low-impedance connection to system ground plane. |
| 4 | MR | Active-low manual reset input - driven low to force reset; internally pulled up to VCC (63kΩ); no external pullup needed. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V reset threshold | Eliminates external resistor divider and calibration effort for 1.8V core rail monitoring. |
| 140ms minimum reset timeout | Meets JEDEC JESD8-12B timing requirements for modern low-power microcontrollers. |
| Debounced MR input with internal pullup | Enables direct connection of mechanical switches without RC filters or firmware debouncing. |
| 3μA supply current at 1.8V | Reduces quiescent power in always-on subsystems - critical for IoT endpoint battery life. |
| Valid reset output down to VCC = 1V | Prevents spurious release during deep brownout, avoiding undefined μP state transitions. |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
|
Use Scenario: Power-up sequencing and brownout recovery in DIN-rail mounted programmable logic controllers with isolated 1.8V FPGA configuration rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to FPGA and microcontroller until 1.8V rail stabilizes for ≥140ms. Use Value: Prevents partial configuration and metastability by guaranteeing reset hold time exceeds FPGA startup tCONFIG requirement. |
Use Scenario: Battery-backed ECG sensor node requiring reliable wake-from-sleep reset after coin-cell voltage sag. IC Role / Device Role / Timing Role: Monitors 1.8V analog front-end supply and triggers reset on undervoltage, with MR enabling user-initiated recalibration. Use Value: Enables single-button hardware reset without MCU intervention, reducing firmware complexity and BOM count. |
| Automotive Body Control Modules | Low-Power Edge AI Accelerators |
|
Use Scenario: Reset supervision for LIN transceiver and 1.8V CAN controller logic in door module ECUs. IC Role / Device Role / Timing Role: Active-high push-pull RESET output directly interfaces to transceiver EN pin, eliminating level-shifting components. Use Value: Reduces component count and improves EMC robustness by removing external pullup resistors susceptible to noise coupling. |
Use Scenario: Power management for ultra-low-power neural network inference chips operating from 1.8V core supply. IC Role / Device Role / Timing Role: Ensures deterministic reset assertion during cold-start and thermal shutdown recovery sequences. Use Value: Guarantees clean state initialization before weight memory access, preventing corrupted inference results. |
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 | 2.63V reset threshold (±2.5%), same 140ms timeout, identical SC70-4 package and MR functionality. | Targets 2.5V/2.8V I/O domain monitoring instead of 1.8V core rail. | Select when supervising higher-voltage rails; pinout and timing are identical - only threshold differs. |
| TPS3808G18DBVR | 1.8V threshold, 200ms timeout (min), SOT-23-5 package, no MR input, 1.5μA typical ICC at 1.8V. | Lacks manual reset capability; suited for simpler reset-only applications without operator intervention. | Choose when MR is unnecessary and lower quiescent current is prioritized over reset flexibility. |
Compared with MAX6385XS18D3-T, MAX6385XS26D3-T offers identical form-factor and timing but targets different supply rails, while TPS3808G18DBVR reduces current draw at the cost of losing MR functionality and requiring a different footprint.
Availability
MAX6385XS18D3-T is available at Aetrix Electronics and suitable for industrial automation, portable medical devices, automotive body electronics, and edge AI hardware requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS18D3-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 computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and energy-sensitive systems where accurate, low-current reset assertion is critical.
FAQ
What is the exact reset threshold voltage of MAX6385XS18D3-T and how tightly is it specified?
The MAX6385XS18D3-T has a factory-set nominal reset threshold of 1.8V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This means the actual threshold falls between 1.755V and 1.845V at +25°C, and between 1.755V and 1.845V across temperature - confirmed in the Electrical Characteristics table under "VCC Reset Threshold".
Does MAX6385XS18D3-T support manual reset, and what is the internal pullup value on the MR pin?
Yes, MAX6385XS18D3-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC, as documented in the "MR Internal Pullup Resistance" specification. This allows direct connection of a momentary switch to GND without external components, and MR remains functional across the full –40°C to +125°C range.
What package type and dimensions does MAX6385XS18D3-T use, and is it RoHS-compliant?
MAX6385XS18D3-T uses a 4-pin SC70 package (outline number 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, as stated in the Ordering Information section and Package Information table.
How long does the reset signal remain asserted after VCC rises above the 1.8V threshold in MAX6385XS18D3-T?
The MAX6385XS18D3-T asserts its active-high RESET output for a guaranteed minimum of 140ms after VCC rises above the 1.8V threshold - designated by the "D3" suffix per the Reset Timeout Delay table. This timeout is temperature-stable, with normalized variation ≤±1.5% across –40°C to +125°C per the "Normalized Power-Up Reset Timeout vs. Temperature" graph.
Can MAX6385XS18D3-T operate reliably at VCC = 1.0V, and what happens to the RESET output below that?
Yes, MAX6385XS18D3-T guarantees correct RESET output logic state down to VCC = 1.0V, as explicitly stated in the Absolute Maximum Ratings and Detailed Description sections. Below 1.0V, the device ceases to function predictably; however, the datasheet notes that for applications requiring validity down to 0V, external pulldown resistors may be used - though this applies only to push-pull outputs like those in MAX6385XS18D3-T.
MAX6385XS18D3-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:
- 1.8V
- 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
MAX6385XS18D3-T FAQ
1.How can I place an order for MAX6385XS18D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS18D3-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 MAX6385XS18D3-T reliable?
The price and inventory of MAX6385XS18D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS18D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS18D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS18D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS18D3-T?
MAX6385XS18D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS18D3-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 MAX6385XS18D3-T?
For technical support, including MAX6385XS18D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS18D3-T requirements.
6.How does Aetrix verify that MAX6385XS18D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS18D3-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 MAX6385XS18D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS18D3-T?
All MAX6385XS18D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS18D3-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 MAX6385XS18D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS18D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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