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Analog Devices Inc./Maxim Integrated MAX6385XS18D5-T
- Part No.:
- MAX6385XS18D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS18D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,437
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Product details
Overview
MAX6385XS18D5-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit designed to monitor +1.8V supply rails in space-constrained embedded systems. It features a factory-set 1.8V reset threshold (±2.5% over –40°C to +125°C), 280ms minimum VCC reset timeout, and consumes only 3μA at 1.8V. Its primary role is to ensure reliable microprocessor reset assertion during power-up, brownout, or transient events in battery-powered instrumentation.
For engineers reviewing the MAX6385XS18D5-T datasheet, MAX6385XS18D5-T pinout, MAX6385XS18D5-T application, or MAX6385XS18D5-T equivalent, key selection criteria include its 4-pin SC70 package, manual reset input with internal pullup, guaranteed reset validity down to VCC = 1V, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Technical Context
This device implements a precision voltage comparator with internal 1.8V reference and an on-chip timer for fixed 280ms reset assertion after VCC recovery. The active-high push-pull output drives high during reset and low otherwise, eliminating need for external pullup resistors. Its MR input includes debouncing logic and a 63kΩ internal pullup, enabling direct connection to momentary switches without external components.
The MAX6385XS18D5-T operates across –40°C to +125°C and guarantees correct reset state down to VCC = 1V. It supports stable operation under fast VCC transients (≤35µs at 100mV overdrive) and maintains ±2.5% threshold accuracy across full temperature range - critical for industrial and automotive-grade power monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V nominal, ±2.5% over –40°C to +125°C - ensures accurate detection of 1.8V rail undervoltage without calibration. |
| VCC Reset Timeout | 280ms minimum - provides sufficient hold time for microprocessor initialization after power stabilization. |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in portable equipment. |
| Output Type | Active-high push-pull - eliminates external pullup resistor, reduces BOM count and board area. |
| Manual Reset Input | MR with 63kΩ internal pullup - allows direct switch-to-GND interface; no external components required. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control applications. |
| VCC Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions. |
Pinout & Package
MAX6385XS18D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 1.25mm × 1.25mm × 0.95mm, suitable for high-density PCB layouts.
| 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 and deasserts low when VCC ≥ 1.8V for ≥280ms. |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation. |
| 4 | MR | Active-low manual reset input; pulling low forces immediate reset assertion and holds reset for 280ms after release. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V threshold | Eliminates external resistor networks and calibration steps in 1.8V system designs. |
| 280ms guaranteed reset timeout | Ensures sufficient processor reset hold time without requiring external timing capacitors. |
| MR input with internal 63kΩ pullup | Reduces component count by enabling direct switch interface without external biasing. |
| Valid reset output down to VCC = 1V | Guarantees deterministic reset behavior during deep brownout, preventing runaway code execution. |
| Negative-going transient immunity | Rejects VCC glitches ≤35µs wide at 100mV overdrive - improves reliability in noisy power environments. |
Applications
| Industrial Sensors | Battery-Powered Meters |
|---|---|
Use Scenario: Remote environmental sensor node powered by coin cell, operating intermittently for data logging. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output feeding MCU and RF transceiver; asserts reset if battery sags below 1.8V during transmission burst. Use Value: Prevents corrupted sensor readings or failed wireless transmissions due to marginal supply voltage. | Use Scenario: Handheld multimeter with auto-power-down and button-initiated wake-up. IC Role / Device Role / Timing Role: Provides both power-on reset and manual reset via front-panel button; 280ms timeout ensures full MCU boot before measurement sequence begins. Use Value: Enables single-button hardware reset without firmware intervention, improving field serviceability. |
| Automotive Body Control Modules | Medical Diagnostic Handhelds |
Use Scenario: Low-voltage subsystem monitoring 1.8V domain in door module, exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises 1.8V core rail of microcontroller; immune to sub-50µs VCC dips during relay switching or ESD events. Use Value: Avoids spurious resets during electrical noise events, maintaining CAN bus communication integrity. | Use Scenario: Portable ultrasound probe with strict power sequencing requirements between analog front-end and digital controller. IC Role / Device Role / Timing Role: Ensures 1.8V digital supply stabilizes for ≥280ms before releasing reset to FPGA, guaranteeing proper configuration loading. Use Value: Eliminates boot failures caused by premature release of FPGA reset signal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR18D5+T | Same 1.8V threshold and 280ms timeout, but active-low open-drain output; requires external pullup resistor. | Suitable where system-level reset logic is active-low and shared across multiple devices. | Select when interfacing with legacy active-low reset buses or when level-shifting is needed via pullup to higher voltage rail. |
| TPS3123E18DBVR | 1.8V threshold, 200ms timeout, active-high push-pull; 1.2µA typical ICC at 1.8V - lower quiescent current. | Optimized for ultra-low-power wearables; lacks MR input and has tighter temp range (–40°C to +85°C). | Choose for battery life-critical applications where manual reset is unnecessary and ambient temperature stays below +85°C. |
Compared with MAX6385XS18D5-T, MAX6326XR18D5+T adds design flexibility for active-low systems but increases component count, while TPS3123E18DBVR extends battery life at the cost of manual reset capability and extended temperature support.
Availability
MAX6385XS18D5-T is available at Aetrix Electronics and suitable for industrial sensors, battery-powered meters, automotive body control modules, and medical diagnostic handhelds requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS18D5-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers low-power, factory-trimmed supervisory circuits optimized for reliable reset generation in 1.0V–5.5V systems where board space, power budget, and temperature robustness are critical constraints.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS18D5-T?
The MAX6385XS18D5-T has a 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 all temperatures - confirmed in the Electrical Characteristics table of the official datasheet.
Does MAX6385XS18D5-T support manual reset functionality, and how is it implemented?
Yes, MAX6385XS18D5-T includes a dedicated MR (manual reset) input on Pin 4. It is active-low and features a 63kΩ internal pullup resistor to VCC, allowing direct connection to a normally-open momentary switch tied to GND. When pulled low, MR forces immediate reset assertion and holds RESET high for the full 280ms timeout period after release - no external components are required.
What package type and dimensions does MAX6385XS18D5-T use?
MAX6385XS18D5-T is packaged in a lead-free, RoHS-compliant 4-pin SC70 (SOT-323) package with outline number 21-0098. Its footprint measures 1.25mm × 1.25mm, with a maximum height of 0.95mm. Land pattern number 90-0187 applies, and thermal resistance θJA is 322.6°C/W on a multilayer board.
Can MAX6385XS18D5-T operate reliably during short VCC transients?
Yes, MAX6385XS18D5-T provides built-in immunity to negative-going VCC transients. According to the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive", it tolerates transients up to 35µs wide when the overdrive (VTH – VCC) is 100mV - preventing false resets during switching noise or load-dump events without external filtering.
Is MAX6385XS18D5-T qualified for automotive applications?
No, MAX6385XS18D5-T is not automotive-qualified. While it operates from –40°C to +125°C, it lacks the /V suffix indicating AEC-Q100 qualification. Automotive-grade equivalents include MAX6385XS18D5/V+T (with /V suffix), which undergoes additional stress testing and screening per AEC-Q100 Rev H standards.
MAX6385XS18D5-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:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS18D5-T FAQ
1.How can I place an order for MAX6385XS18D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS18D5-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 MAX6385XS18D5-T reliable?
The price and inventory of MAX6385XS18D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS18D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS18D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS18D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS18D5-T?
MAX6385XS18D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS18D5-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 MAX6385XS18D5-T?
For technical support, including MAX6385XS18D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS18D5-T requirements.
6.How does Aetrix verify that MAX6385XS18D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS18D5-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 MAX6385XS18D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS18D5-T?
All MAX6385XS18D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS18D5-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 MAX6385XS18D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS18D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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