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Analog Devices Inc./Maxim Integrated MAX6385XS18D7-T
- Part No.:
- MAX6385XS18D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS18D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,841
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Product details
Overview
MAX6385XS18D7-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 1.8V reset threshold (±2.5% over −40°C to +125°C), 1200ms minimum VCC reset timeout, and debounced manual reset input. It monitors single-supply rails in battery-powered microcontroller systems, ensuring reliable power-on reset and brownout recovery.
For engineers reviewing the MAX6385XS18D7-T datasheet, MAX6385XS18D7-T pinout, MAX6385XS18D7-T application, or MAX6385XS18D7-T equivalent, key selection criteria include its 3μA supply current at 1.8V, guaranteed valid reset output down to VCC = 1V, 4-pin SC70 package, and compatibility with manual reset switch interfaces requiring no external debounce.
Technical Context
The MAX6385XS18D7-T implements a precision bandgap-based voltage comparator for VCC monitoring against a fixed 1.8V threshold, paired with a temperature-stable RC timer generating a 1200ms minimum reset assertion period after VCC recovery. Its internal 63kΩ MR pullup enables direct connection of a momentary switch to GND without external components.
This device uses BiCMOS process technology to achieve 3μA quiescent current at 1.8V while maintaining ±2.5% threshold accuracy across −40°C to +125°C and immunity to negative-going VCC transients ≤150µs (at 100mV overdrive). Reset output remains logic-valid down to VCC = 1V, supporting low-voltage system operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.8V nominal, ±2.5% over −40°C to +125°C - ensures consistent brownout detection across automotive/industrial temperature ranges |
| VCC Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable devices |
| Reset Timeout Period | 1200ms minimum - guarantees sufficient hold time for slow-ramping power supplies and complex μP initialization sequences |
| Reset Output Type | Active-high push-pull - drives high-impedance μP reset inputs directly without external pullup resistors |
| Manual Reset Input | MR with 63kΩ internal pullup - supports simple SPST switch-to-GND interface; no external components required |
| Operating Voltage Range | 1.0V to 5.5V - allows use with core voltages as low as 1.0V while remaining compatible with 3.3V/5V I/O domains |
| Reset Output Validity | Guaranteed down to VCC = 1V - maintains deterministic reset state during deep brownout conditions |
Pinout & Package
MAX6385XS18D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.75mm, optimized for space-constrained portable electronics.
| 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 - asserts high during reset; sinks 80µA at VCC ≥ 1.0V, sources 150µA at VCC ≥ 1.8V |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup to VCC; logic-low pulse ≥1µs forces reset for full timeout period |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V reset threshold | Eliminates external resistor divider; reduces BOM count and layout area in 1.8V core systems |
| 1200ms minimum VCC reset timeout | Meets JEDEC JESD78 requirements for μP reset hold time in systems with slow power-rail ramp rates |
| Integrated MR pullup resistor | Removes need for external pullup; simplifies PCB routing and reduces risk of floating reset input |
| 3μA supply current at 1.8V | Extends battery life in always-on sensor nodes - e.g., adds >2 years runtime to CR2032-powered designs |
| Negative-going transient immunity | Rejects VCC glitches ≤150µs duration (at 100mV overdrive), preventing spurious resets in noisy environments |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Power-up sequencing and brownout protection for ARM Cortex-M4-based data acquisition modules operating from 1.8V LDOs. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to μP until 1.8V rail stabilizes for ≥1200ms. Use Value: Prevents firmware corruption during unstable power conditions; eliminates need for discrete RC reset networks. |
Use Scenario: Reliable cold-start and low-battery reset handling in Bluetooth LE-enabled ECG patches powered by thin-film batteries. IC Role / Device Role / Timing Role: Monitors 1.8V core supply and provides manual reset via tactile button for field firmware updates. Use Value: 3μA quiescent current extends usable battery life; MR input enables user-initiated safe reboot without host MCU involvement. |
| Automotive Body Control Units | Smart Home Edge Nodes |
Use Scenario: AEC-Q100 qualified reset supervision for LIN bus transceivers and CAN gateways in 12V-to-1.8V distributed power architectures. IC Role / Device Role / Timing Role: Ensures deterministic μP reset timing across −40°C to +125°C ambient, with 1.8V threshold matching core logic voltage. Use Value: ±2.5% threshold accuracy prevents premature reset release in high-temp engine bay environments. |
Use Scenario: Power management for Zigbee 3.0 SoCs in battery-operated smart locks and occupancy sensors. IC Role / Device Role / Timing Role: Provides 1200ms reset hold time after wake-from-sleep voltage recovery and supports button-press reset via MR pin. Use Value: Push-pull active-high output interfaces directly with SoC reset pins; no level-shifting or pullup resistors needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS18D4-T | Same 1.8V threshold and MR input, but 1120ms VCC reset timeout (vs. 1200ms) | Suitable where slightly shorter reset hold time is acceptable for faster boot sequences | Select when system μP initialization completes before 1200ms; offers identical pinout and footprint |
| TPS3123E18DBVR | 1.8V threshold, 200ms reset timeout, 1.8V–5.5V operation, but no manual reset input | Lacks MR functionality; requires external circuitry for user-initiated reset | Choose only if manual reset is unnecessary and tighter reset timing tolerance (±0.5%) is prioritized over MR capability |
Compared with MAX6385XS18D7-T, the D4 variant trades 80ms of reset hold time for identical form/fit/function, while TPS3123E18DBVR sacrifices MR integration and timeout flexibility for higher threshold accuracy - making MAX6385XS18D7-T optimal for systems needing long, guaranteed reset assertion plus field-serviceable manual reset.
Availability
MAX6385XS18D7-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, automotive body control units, smart home edge nodes, and battery-powered microcontroller systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS18D7-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 medical applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers ultra-low-power μP supervisory circuits targeting space- and energy-constrained embedded systems requiring guaranteed reset behavior across extended temperature ranges.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS18D7-T?
The MAX6385XS18D7-T has a factory-set nominal reset threshold of 1.8V, 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 extremes - critical for robust brownout detection in 1.8V core systems.
Does MAX6385XS18D7-T support manual reset, and how is it implemented?
Yes, MAX6385XS18D7-T features a dedicated MR (manual reset) input with an internal 63kΩ pullup resistor to VCC. Driving MR low for ≥1µs forces an immediate reset assertion for the full 1200ms timeout period. The pin accepts TTL/CMOS logic levels and can be connected directly to a normally open momentary switch tied to GND - no external components are required.
What package type and dimensions does MAX6385XS18D7-T use?
MAX6385XS18D7-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 1.2mm × 1.6mm × 0.75mm. Its compact footprint and thermal resistance (θJA = 322.6°C/W on multilayer board) make it ideal for dense PCB layouts in portable and wearable electronics.
How does MAX6385XS18D7-T behave during deep brownout conditions?
MAX6385XS18D7-T guarantees valid reset output logic states down to VCC = 1.0V. When VCC drops below 1.8V, RESET asserts high and remains asserted until VCC rises above 1.8V and holds for 1200ms. Even as VCC declines toward 1.0V, the push-pull output continues sourcing/sinking specified current - ensuring deterministic μP reset behavior throughout brownout.
Is MAX6385XS18D7-T qualified for automotive applications?
No, MAX6385XS18D7-T is not AEC-Q100 qualified. While it operates across −40°C to +125°C, automotive-grade variants in this family carry a "/V" suffix (e.g., MAX6385XS18D7/V+T). For automotive body electronics or infotainment systems requiring AEC-Q100 certification, the /V version must be selected instead of MAX6385XS18D7-T.
MAX6385XS18D7-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:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS18D7-T FAQ
1.How can I place an order for MAX6385XS18D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS18D7-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 MAX6385XS18D7-T reliable?
The price and inventory of MAX6385XS18D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS18D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS18D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS18D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS18D7-T?
MAX6385XS18D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS18D7-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 MAX6385XS18D7-T?
For technical support, including MAX6385XS18D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS18D7-T requirements.
6.How does Aetrix verify that MAX6385XS18D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS18D7-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 MAX6385XS18D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS18D7-T?
All MAX6385XS18D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS18D7-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 MAX6385XS18D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS18D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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