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Analog Devices Inc./Maxim Integrated MAX6385XS44D5
- Part No.:
- MAX6385XS44D5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS44D5.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,716
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Product details
Overview
MAX6385XS44D5 from Maxim Integrated is a low-power, active-high push-pull microprocessor supervisory circuit with factory-set 4.38V reset threshold, 280ms minimum reset timeout, and debounced manual reset input. It monitors VCC in systems requiring reliable power-on reset, brownout detection, and operator-initiated reset-such as portable instrumentation and battery-powered controllers.
For engineers reviewing the MAX6385XS44D5 datasheet, MAX6385XS44D5 pinout, MAX6385XS44D5 application, or MAX6385XS44D5 equivalent, key selection criteria include its ±2.5% threshold accuracy over –40°C to +125°C, guaranteed valid reset output down to VCC = 1V, 3µA supply current at 1.8V, and SC70-4 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6385XS44D5 implements a precision bandgap-based voltage comparator with internal 1.27V reference for threshold generation, paired with a temperature-stable RC timer for deterministic 280ms reset assertion after VCC recovery. Its active-high push-pull output drives directly into µP reset inputs without external pull-up components.
It integrates a debounced manual reset input (MR) with internal 63kΩ pullup resistor, enabling clean reset initiation via momentary switch or logic signal. The device guarantees correct reset state during VCC ramp-down to 1V and rejects negative-going transients ≤280µs at 100mV overdrive, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (±2.5% over –40°C to +125°C); ensures reliable detection of 4.5V rail brownout before system instability. |
| Reset Timeout | 280ms minimum; holds µP in reset long enough for power rails and clocks to stabilize post-brownout. |
| Supply Current | 3µA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors and portable devices. |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor and supports direct connection to standard µP reset pins. |
| Manual Reset | Debounced MR input with 63kΩ internal pullup; allows switch-based reset without external RC filtering or firmware debounce. |
| Operating Voltage | 1.0V to 5.5V; guarantees functional reset assertion even during deep brownout conditions down to 1V VCC. |
| Temp Range | –40°C to +125°C; qualified for automotive under-hood, industrial control, and extended-temperature embedded applications. |
Pinout & Package
MAX6385XS44D5 is housed in a lead-free 4-pin SC70 package (X4-1), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage rail; powers internal circuitry and serves as reset threshold reference point. |
| 2 | RESET | Active-high push-pull reset output; asserts high during fault condition and deasserts low after timeout-directly compatible with most µP reset inputs. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; pulling low forces immediate reset assertion for test, debug, or user-initiated reboot. |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±2.5% tolerance across full temperature range-eliminates need for external resistor dividers or calibration. |
| Guaranteed reset validity to 1V VCC | Ensures deterministic reset behavior during deep undervoltage events where many competing supervisors fail or float. |
| Integrated MR pullup resistor | 63kΩ internal pullup enables single-switch manual reset implementation-no external components required for basic functionality. |
| Negative transient immunity | Rejects VCC glitches ≤280µs wide at 100mV overdrive-reduces false resets in electrically noisy environments like motor drives or switching supplies. |
| Ultra-low quiescent current | 3µA at 1.8V enables >10-year battery life in always-on monitoring nodes powered by CR2032 cells. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch continuously monitors heart rhythm on a single coin cell for 18 months. IC Role / Device Role / Timing Role: MAX6385XS44D5 supervises 3.3V LDO output, asserting reset if battery voltage drops below 4.38V during discharge or cold-temperature operation. Use Value: Prevents corrupted data logging or firmware lockup by guaranteeing clean µP restart before analog front-end bias points collapse. | Use Scenario: DIN-rail mounted I/O module interfaces with 24V fieldbus and 5V logic, exposed to industrial EMI and thermal cycling. IC Role / Device Role / Timing Role: MAX6385XS44D5 monitors 5V logic rail and provides 280ms reset hold-off after power interruption, while MR supports field technician-initiated reboots. Use Value: Ensures deterministic boot sequence despite voltage sags from relay coil switching or nearby VFD noise coupling. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: BCM manages door locks, lighting, and CAN gateway in ambient temperatures from –40°C to +105°C. IC Role / Device Role / Timing Role: MAX6385XS44D5 supervises 5V microcontroller supply, asserting reset on battery dip below 4.38V during cranking or alternator failure. Use Value: Maintains ±2.5% threshold accuracy across full automotive temp range-prevents spurious resets during cold starts or hot-soak conditions. | Use Scenario: Wi-Fi-connected home hub draws standby power from USB-C PD adapter and wakes on motion detection. IC Role / Device Role / Timing Role: MAX6385XS44D5 monitors 3.3V always-on rail, providing 280ms reset window after wake-up supply stabilization and supporting MR-triggered factory reset. Use Value: Enables zero-component manual reset path and ultra-low 3µA quiescent draw-critical for Energy Star compliance and battery backup runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR43D3 | Same 4.30V threshold and 140ms timeout; active-low open-drain output; no MR input. | Requires external pull-up resistor; unsuitable where active-high drive or manual reset is mandatory. | Select only if system design already uses open-drain reset architecture and does not require MR functionality. |
| TPS3808G33DBVR | 3.3V fixed threshold; 200ms timeout; active-high push-pull; 1.6µA ICC at 1.8V; no MR input. | Lacks manual reset capability; threshold not adjustable via part number suffix; lower supply current but narrower voltage range. | Prefer when 3.3V rail supervision suffices and MR is unnecessary; verify timing margin against 280ms requirement. |
Compared with MAX6385XS44D5, MAX6326XR43D3 requires board-level redesign for open-drain interface and omits MR, while TPS3808G33DBVR offers lower ICC but lacks configurable threshold and manual reset-making MAX6385XS44D5 optimal for 4.38V systems needing robust, self-contained reset control.
Availability
MAX6385XS44D5 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 across extended temperature and long-life battery operation.
Supply support for MAX6385XS44D5 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 µP supervisory circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6385XS44D5?
The MAX6385XS44D5 has a factory-set nominal reset threshold of 4.38V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "44" corresponds to VTH(nom) = 4.38V, VTH(min) = 4.27V, and VTH(max) = 4.48V.
Does MAX6385XS44D5 support manual reset functionality?
Yes, MAX6385XS44D5 includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 280ms timeout period after MR is released. This feature is explicitly documented in the Pin Description and Detailed Description sections for MAX6385.
What package type and dimensions does MAX6385XS44D5 use?
MAX6385XS44D5 is packaged in a lead-free 4-pin SC70 (X4-1) package, with outline dimensions of 2.0mm × 2.1mm × 0.95mm. This is confirmed in the Ordering Information table and Package Information section, where "XS" denotes the SC70-4 variant and "X4-1" is the official package code.
Can MAX6385XS44D5 operate reliably at VCC = 1.0V?
Yes, MAX6385XS44D5 guarantees valid reset output logic states down to VCC = 1.0V, as stated in the Electrical Characteristics table under "Reset Output State Guaranteed Valid Down to VCC = 1V." This ensures deterministic behavior during deep brownout conditions where many competing supervisors lose output control.
What is the supply current consumption of MAX6385XS44D5 at 1.8V?
At VCC = +1.8V and TA = +25°C, MAX6385XS44D5 consumes 3µA typical supply current (ICC), with a maximum of 6µA over temperature. This value is specified in the Electrical Characteristics table under "VCC Supply Current" and is critical for ultra-low-power battery-operated applications.
MAX6385XS44D5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6385XS44D5 FAQ
1.How can I place an order for MAX6385XS44D5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS44D5 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 MAX6385XS44D5 reliable?
The price and inventory of MAX6385XS44D5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS44D5 is usually 5 days.
3.What payment methods are accepted for MAX6385XS44D5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS44D5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS44D5?
MAX6385XS44D5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS44D5 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 MAX6385XS44D5?
For technical support, including MAX6385XS44D5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS44D5 requirements.
6.How does Aetrix verify that MAX6385XS44D5 is sourced from the original manufacturer or authorized distributors?
All MAX6385XS44D5 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 MAX6385XS44D5 meets industry standards.
7.What is the process for return or replacement of MAX6385XS44D5?
All MAX6385XS44D5 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS44D5, 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 MAX6385XS44D5 part is unused and in its original packaging.
Return procedure for MAX6385XS44D5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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