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Analog Devices Inc./Maxim Integrated MAX6385XS18D1-T
- Part No.:
- MAX6385XS18D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS18D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,149
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Product details
Overview
MAX6385XS18D1-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), 1ms minimum reset timeout, and manual reset input (MR) with internal 63kΩ pullup. It monitors VCC in battery-powered embedded systems and guarantees valid reset state down to VCC = 1V.
For engineers reviewing the MAX6385XS18D1-T datasheet, MAX6385XS18D1-T pinout, MAX6385XS18D1-T application, or MAX6385XS18D1-T equivalent, this page delivers verified electrical parameters, SC70-4 package layout, MR debounce capability, reset threshold accuracy, and automotive-grade AEC-Q100 qualification context for reliable power-on reset design.
Technical Context
The MAX6385XS18D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across −40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 1ms reset assertion after VCC rises above 1.8V.
It features a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection, and guarantees correct RESET logic state for VCC ≥ 1V - enabling robust operation during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V nominal, ±2.5% over −40°C to +125°C - ensures accurate brownout detection across industrial temperature range |
| Reset Timeout | 1ms minimum - provides sufficient hold time for microcontroller initialization at power-up |
| VCC Supply Current | 3µA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct MCU reset pin drive |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch connection without external components |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V supply |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during undervoltage recovery |
Pinout & Package
MAX6385XS18D1-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 portable designs.
| Pin | 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 assertion; sinks current when deasserted; no external pullup required |
| 3 | MR | Active-low manual reset input - initiates reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers - must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V reset threshold | ±2.5% accuracy over full −40°C to +125°C range - eliminates external calibration and reduces BOM count |
| 1ms minimum reset timeout | Guaranteed assertion duration - meets minimum reset hold time requirements of ARM Cortex-M0/M3 and RISC-V MCUs |
| Debounced MR input | 100ns glitch rejection and 1µs minimum pulse width - prevents spurious resets from mechanical switch bounce or EMI |
| Low 3µA supply current at 1.8V | Enables >10-year battery life in always-on monitoring nodes using CR2032 cells |
| AEC-Q100 qualified | Qualified for automotive applications per Rev 7 datasheet - supports under-hood and infotainment system deployment |
Applications
| Power-On Reset for Wearable Sensors | Battery-Powered Industrial Logger |
|---|---|
|
Use Scenario: A wrist-worn health monitor boots from coin-cell power and must initialize its BLE SoC and analog front-end reliably after each cold start. IC Role / Device Role / Timing Role: MAX6385XS18D1-T asserts active-high RESET for ≥1ms upon VCC crossing 1.8V, ensuring complete SoC core and peripheral power-rail stabilization before release. Use Value: 3µA quiescent current extends CR2032 battery life beyond 3 years; ±2.5% threshold accuracy prevents premature or delayed reset under temperature variation. |
Use Scenario: An environmental data logger operates intermittently in remote locations, powered by Li-SOCl₂ primary cells with wide temperature exposure (−40°C to +85°C). IC Role / Device Role / Timing Role: MAX6385XS18D1-T monitors VCC during cold-start and brownout events, asserting RESET until stable 1.8V+ supply is confirmed and held for 1ms. Use Value: Guaranteed operation down to VCC = 1V ensures deterministic reset during gradual battery depletion; AEC-Q100 qualification validates reliability in harsh field environments. |
| Automotive Body Control Module (BCM) | Industrial PLC I/O Expansion Card |
|
Use Scenario: A BCM sub-module receives unregulated 12V vehicle power, regulated down to 1.8V for its microcontroller; must survive load-dump and cold-crank transients. IC Role / Device Role / Timing Role: MAX6385XS18D1-T provides clean, glitch-immune power-on reset and manual reset via diagnostic port, with MR debouncing integrated. Use Value: Negative-going VCC transient immunity (per Figure 7) suppresses false resets during cranking; AEC-Q100 /V variant compatibility enables drop-in qualification path. |
Use Scenario: A modular PLC backplane supplies 1.8V to hot-swap I/O cards; each card requires independent, fail-safe reset coordination during insertion/removal. IC Role / Device Role / Timing Role: MAX6385XS18D1-T delivers localized reset control with MR pin allowing centralized reset initiation from main controller. Use Value: Active-high push-pull output interfaces directly with 1.8V logic without level-shifting; 4-pin SC70 footprint minimizes PCB area on dense carrier boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS18D2-T | Same 1.8V threshold and active-high push-pull output, but 20ms reset timeout instead of 1ms | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration or multi-rail sequencing) | Select when extended reset assertion improves system stability during complex power-up sequences |
| TPS3123E18DBVR | 1.8V threshold, active-high open-drain output, 200ms timeout, 1.5µA ICC at 1.8V - no MR input | Lacks manual reset; requires external pullup; lower current draw but less flexible reset control | Choose only if MR functionality is unnecessary and ultra-low current (<2µA) is prioritized over reset configurability |
Compared with MAX6385XS18D1-T, the D2-T variant trades shorter reset timing for greater sequencing margin, while TPS3123E18DBVR sacrifices MR and push-pull drive for marginal current reduction - making MAX6385XS18D1-T optimal for compact, manually resettable, 1ms-critical embedded controllers.
Availability
MAX6385XS18D1-T is available at Aetrix Electronics and suitable for battery-powered wearables, automotive body electronics, industrial data loggers, and PLC I/O modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS18D1-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing markets.
The MAX6381–MAX6390 family was designed specifically for low-voltage, low-power microprocessor reset supervision in space- and energy-constrained applications - delivering precision thresholds, minimal current, and robust transient immunity in miniature packages.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS18D1-T?
The MAX6385XS18D1-T has a factory-set nominal reset threshold of 1.80V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −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 MAX6385XS18D1-T support manual reset, and how is it implemented?
Yes, MAX6385XS18D1-T includes a dedicated MR (manual reset) pin with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset; the device holds RESET high for the full 1ms timeout after MR is released. No external components are needed, and the input rejects glitches as short as 100ns - fully documented in the Pin Description and Applications Information sections.
What package type and dimensions does MAX6385XS18D1-T use?
MAX6385XS18D1-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. The land pattern is specified as 90-0187, and thermal resistance is θJA = 322.6°C/W on a multilayer board - details confirmed in the Package Information section of the datasheet.
Is MAX6385XS18D1-T qualified for automotive applications?
Yes, MAX6385XS18D1-T is AEC-Q100 qualified for automotive use, as explicitly stated in the Features list and Ordering Information section. While the standard part number lacks the "/V" suffix, the datasheet confirms AEC-Q100 qualification applies to the entire MAX6381–MAX6390 family, including MAX6385XS18D1-T, with operating temperature range −40°C to +125°C.
What is the supply current consumption of MAX6385XS18D1-T at 1.8V?
At VCC = +1.8V and TA = +25°C, MAX6385XS18D1-T consumes 3µA typical and 6µA maximum supply current - specified in the Electrical Characteristics table under "VCC Supply Current". This ultra-low current enables multi-year operation in battery-powered edge devices.
MAX6385XS18D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS18D1-T FAQ
1.How can I place an order for MAX6385XS18D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS18D1-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 MAX6385XS18D1-T reliable?
The price and inventory of MAX6385XS18D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS18D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS18D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS18D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS18D1-T?
MAX6385XS18D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS18D1-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 MAX6385XS18D1-T?
For technical support, including MAX6385XS18D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS18D1-T requirements.
6.How does Aetrix verify that MAX6385XS18D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS18D1-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 MAX6385XS18D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS18D1-T?
All MAX6385XS18D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS18D1-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 MAX6385XS18D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS18D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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