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Analog Devices Inc./Maxim Integrated MAX6385XS18D6-T
- Part No.:
- MAX6385XS18D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS18D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,030
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Product details
Overview
MAX6385XS18D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.8V reset threshold (±2.5% over -40°C to +125°C), 560ms minimum VCC reset timeout, and debounced manual reset input. It monitors single-supply rails in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS18D6-T datasheet, MAX6385XS18D6-T pinout, MAX6385XS18D6-T application, or MAX6385XS18D6-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 manual reset switch interfaces requiring no external debounce.
Technical Context
The MAX6385XS18D6-T implements a precision voltage comparator with internal 1.8V reference and an on-chip timer for fixed 560ms reset assertion after VCC recovery. Its MR input features a 63kΩ internal pullup resistor and accepts TTL/CMOS logic levels, enabling direct connection to momentary switches without external components.
Reset assertion occurs when VCC falls below 1.8V or MR is pulled low; the active-high RESET output remains high for ≥560ms after VCC exceeds 1.8V or MR is released. The device guarantees correct output state down to VCC = 1V and provides immunity to negative-going VCC transients up to 100mV overdrive for durations under ~10µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.8V ±2.5% over -40°C to +125°C - ensures reliable detection of 1.8V rail brownout across automotive/industrial temperature range |
| VCC Reset Timeout | 560ms minimum - holds processor in reset long enough for stable clock and supply settling after power recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| Reset Output Type | Active-high push-pull - drives reset line directly without external pullup, simplifying PCB layout and reducing BOM count |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - supports direct connection to normally open switch; no external RC network required |
| Operating Voltage Range | 1.0V to 5.5V - allows use with 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic domains while maintaining reset functionality down to 1V |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint compatible with space-constrained portable designs |
Pinout & Package
MAX6385XS18D6-T is housed in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for compact board layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset threshold reference point |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition; sinks/source current per spec without external components |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing and noise immunity |
| 4 | MR | Active-low manual reset input - initiates reset when pulled low; internal 63kΩ pullup eliminates need for external resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V reset threshold | Eliminates external resistor divider, reduces component count, and improves accuracy vs. discrete solutions |
| 560ms fixed reset timeout | Guarantees sufficient hold time for microcontroller initialization sequences without requiring programmable delay logic |
| MR input with integrated pullup | Enables direct switch interface with zero external parts - reduces layout complexity and improves reliability |
| 1.0V to 5.5V operating range | Supports wide-input applications including multi-rail systems and legacy 5V designs alongside modern low-voltage ICs |
| 3μA supply current at 1.8V | Extends battery life in always-on monitoring devices by minimizing quiescent power draw |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 1.8V MCU core voltage. IC Role / Device Role / Timing Role: Supervises 1.8V supply and asserts active-high reset to prevent firmware execution during battery voltage sag. Use Value: 3μA quiescent current extends operational life beyond 2 years; 560ms timeout ensures full ADC calibration before main loop starts. | Use Scenario: DIN-rail mounted analog input module with isolated 3.3V and 1.8V supplies for signal conditioning and microcontroller. IC Role / Device Role / Timing Role: Monitors 1.8V core rail and provides hardware reset to ARM Cortex-M3 during AC line disturbances. Use Value: ±2.5% threshold accuracy over -40°C to +85°C maintains reset integrity across industrial ambient conditions. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Door module with LIN transceiver and 1.8V microcontroller operating in vehicle cabin (-40°C to +105°C). IC Role / Device Role / Timing Role: Detects undervoltage on 1.8V domain caused by load dump transients and forces controlled MCU restart. Use Value: Negative-going transient immunity prevents spurious resets during alternator switching events. | Use Scenario: Wi-Fi-connected thermostat using 1.8V SoC and dual 3.3V/1.8V PMIC outputs. IC Role / Device Role / Timing Role: Provides independent reset supervision for 1.8V core rail while sharing same PCB footprint as legacy MAX809 variants. Use Value: Pin-compatible replacement reduces redesign effort; 4-pin SC70 saves board area versus 3-pin alternatives requiring external pullup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 1.63V reset threshold, 240ms timeout, no MR input, 3-pin SC70 | Lacks manual reset capability and has shorter timeout - unsuitable for systems requiring field-service reset or extended initialization | Select only if 1.63V threshold matches target rail and manual reset is unnecessary |
| TPS3808G18DBVR | 1.8V threshold, 200ms timeout, active-low open-drain output, 5-pin SOT-23 | Requires external pullup resistor and offers shorter timeout - increases BOM count and may not meet reset-hold requirements | Choose when open-drain interface is mandatory or SOT-23 footprint is preferred over SC70 |
Compared with MAX809TRD3-T and TPS3808G18DBVR, MAX6385XS18D6-T uniquely combines 1.8V threshold accuracy, 560ms timeout, active-high push-pull output, and integrated MR pullup in a 4-pin SC70 - delivering higher integration and longer reset hold time for modern low-voltage microcontrollers.
Availability
MAX6385XS18D6-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply and long-term production continuity.
Supply support for MAX6385XS18D6-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 power management, sensing, and connectivity applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and energy-constrained embedded systems requiring robust reset functionality across wide temperature ranges.
FAQ
What is the reset threshold voltage and tolerance for MAX6385XS18D6-T?
The MAX6385XS18D6-T has a factory-set reset threshold of 1.8V 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 detection of 1.8V supply brownout conditions in automotive and industrial environments where voltage regulation margins are tight.
Does MAX6385XS18D6-T require an external pullup resistor on the RESET pin?
No, MAX6385XS18D6-T does not require an external pullup resistor on the RESET pin because it features an active-high push-pull output. The internal driver actively sources current when asserting reset and sinks current when deasserting, eliminating dependency on external passive components and simplifying schematic design for the MAX6385XS18D6-T.
What is the function of the MR pin on MAX6385XS18D6-T and how should it be used?
The MR pin on MAX6385XS18D6-T is an active-low manual reset input with a built-in 63kΩ pullup resistor to VCC. To initiate a reset, drive MR low using a momentary switch to GND or compatible logic signal. When unused, MR can be left floating due to the internal pullup. This feature enables field-service reset capability without adding external components to the MAX6385XS18D6-T design.
What is the minimum VCC voltage at which MAX6385XS18D6-T guarantees valid reset output behavior?
MAX6385XS18D6-T guarantees correct RESET output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry may not maintain defined output behavior. This specification ensures reliable reset assertion during deep brownout conditions common in battery-powered systems, making MAX6385XS18D6-T suitable for applications where supply collapse must be detected early.
Is MAX6385XS18D6-T pin-compatible with other supervisory ICs in the same family?
Yes, MAX6385XS18D6-T shares the same 4-pin SC70 pinout as other members of the MAX6384–MAX6390 series with XS prefix, including MAX6384XS18D6-T and MAX6386XS18D6-T. This allows drop-in substitution within the same reset threshold and timeout configuration group, provided the reset polarity (active-high push-pull) and MR functionality match the system requirements for MAX6385XS18D6-T.
MAX6385XS18D6-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:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS18D6-T FAQ
1.How can I place an order for MAX6385XS18D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS18D6-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 MAX6385XS18D6-T reliable?
The price and inventory of MAX6385XS18D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS18D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS18D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS18D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS18D6-T?
MAX6385XS18D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS18D6-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 MAX6385XS18D6-T?
For technical support, including MAX6385XS18D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS18D6-T requirements.
6.How does Aetrix verify that MAX6385XS18D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS18D6-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 MAX6385XS18D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS18D6-T?
All MAX6385XS18D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS18D6-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 MAX6385XS18D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS18D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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