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Analog Devices Inc./Maxim Integrated MAX6385XS37D3-T
- Part No.:
- MAX6385XS37D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS37D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
The MAX6385XS37D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.70V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and integrated debounced manual reset input (MR). It monitors single-supply rails from +1.8V to +5.0V while consuming only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V - used in portable battery-powered equipment and industrial controllers requiring reliable power-on reset.
For engineers reviewing the MAX6385XS37D3-T datasheet, MAX6385XS37D3-T pinout, MAX6385XS37D3-T application, or MAX6385XS37D3-T equivalent, key selection criteria include its 4-pin SC70 package, 3.70V threshold accuracy, MR input compatibility with TTL/CMOS logic, immunity to negative-going VCC transients, and guaranteed operation across automotive temperature range (-40°C to +125°C).
Technical Context
This device implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for reset assertion timing. The MR input features a 63kΩ internal pullup resistor and supports glitch rejection of 100ns, with MR-to-reset delay under 200ns.
Reset assertion occurs when VCC falls below 3.70V or MR is pulled low; reset remains asserted for ≥140ms after VCC recovers above threshold or MR is released. Output logic is active-high push-pull, sourcing up to 800µA at VCC ≥ 4.5V and sinking 3.2mA during reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.70V ±2.5% over -40°C to +125°C - ensures stable brownout detection across automotive temperature range |
| Reset Timeout | 140ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in always-on portable systems |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor on reset line |
| Manual Reset Input | MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external components |
| Operating Voltage | +1.0V to +5.5V - supports valid reset signaling even during deep brownout conditions |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial embedded applications |
Pinout & Package
MAX6385XS37D3-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, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - drives high during reset assertion; sinks 3.2mA at VCC ≥ 4.5V |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; logic low forces reset for ≥140ms after release |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.70V with ±2.5% tolerance over full temperature range - eliminates external resistor divider calibration |
| Debounced manual reset input | MR accepts direct switch closure to GND; internal 63kΩ pullup and 100ns glitch rejection remove need for external RC debounce |
| Negative-going transient immunity | Immune to VCC glitches ≤35µs duration when overdrive is 100mV - prevents spurious resets in noisy power environments |
| Low-voltage operation guarantee | Valid RESET output state maintained down to VCC = 1.0V - ensures deterministic behavior during deep brownout recovery |
| Automotive qualification | AEC-Q100 qualified (per /V version ordering code) - meets stress testing requirements for automotive electronics |
Applications
| Portable Medical Monitor | Industrial PLC Controller |
|---|---|
|
Use Scenario: Battery-powered handheld ECG monitor operating from 3.3V Li-ion supply with intermittent wireless transmission. IC Role / Device Role / Timing Role: Supervises 3.3V rail and asserts active-high RESET to ARM Cortex-M4 during power-up and brownout events. Use Value: 3μA quiescent current extends battery life beyond 3 years; 140ms timeout ensures full MCU boot sequence completes before release. |
Use Scenario: DIN-rail mounted programmable logic controller with dual 24V/5V supplies and field I/O modules. IC Role / Device Role / Timing Role: Monitors 5V logic rail and provides manual reset via front-panel pushbutton for firmware recovery. Use Value: MR input with internal pullup simplifies front-panel wiring; -40°C to +125°C rating ensures reliability in uncontrolled cabinet environments. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Under-dash BCM powered from vehicle battery (9V–16V) with local 3.3V LDO regulation. IC Role / Device Role / Timing Role: Resets microcontroller upon 3.3V rail drop below 3.70V during cold-crank or load-dump transients. Use Value: AEC-Q100 qualification and 3.70V threshold match typical 3.3V LDO dropout margins; 140ms timeout avoids false triggers during short dips. |
Use Scenario: Revenue-grade electricity meter with tamper detection, RTC backup, and optical communication interface. IC Role / Device Role / Timing Role: Ensures clean startup of metrology SoC after AC power restoration or battery switchover. Use Value: Valid reset output down to VCC = 1.0V prevents latch-up during slow-ramp power-up; 4-pin SC70 saves PCB area in space-constrained meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS37D3+T | No /V automotive qualification; same electrical specs and 4-pin SC70 package | Suitable for commercial/industrial use only; not validated for automotive AEC-Q100 stress tests | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| MAX6326XR37D3+T | Same 3.70V threshold and 140ms timeout but uses 3-pin SC70 package; no MR input | Lacks manual reset capability; requires external reset button circuitry if needed | Choose when board space is critical and manual reset is not required |
Compared with MAX6385XS37D3-T, the /V-free MAX6385XS37D3+T offers identical performance at lower cost for non-automotive designs, while MAX6326XR37D3+T reduces footprint by one pin but removes MR functionality - making it unsuitable for field-serviceable or user-recoverable systems.
Availability
MAX6385XS37D3-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS37D3-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 computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits optimized for battery-operated and automotive systems where accurate voltage monitoring and robust reset timing are mission-critical.
FAQ
What is the exact reset threshold voltage of the MAX6385XS37D3-T?
The MAX6385XS37D3-T has a factory-set nominal reset threshold of 3.70V, 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 and applies specifically to the "37" suffix in the part number. The MAX6385XS37D3-T maintains this accuracy without external calibration components.
Does the MAX6385XS37D3-T support manual reset functionality?
Yes, the MAX6385XS37D3-T includes a dedicated MR (manual reset) input with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset, which remains active for the full 140ms timeout period after MR is released. This feature is confirmed in the Pin Description and Features sections, and the MAX6385XS37D3-T pinout shows MR on pin 3 of the 4-pin SC70 package.
What package type and dimensions does the MAX6385XS37D3-T use?
The MAX6385XS37D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant package is explicitly listed in the Ordering Information table for MAX6385XS_ _D_+T variants. The MAX6385XS37D3-T does not use μDFN or 3-pin SC70 packages - those are assigned to other members of the MAX6381–MAX6390 family.
Is the MAX6385XS37D3-T qualified for automotive applications?
Yes, the MAX6385XS37D3-T carries the "/V" automotive qualification per AEC-Q100, indicated by the "/V+T" suffix in official ordering codes and confirmed in the Package Information section. Its -40°C to +125°C operating range, transient immunity, and production flow meet automotive reliability standards. The MAX6385XS37D3-T is intended for under-hood and cabin control modules where environmental robustness is mandatory.
What is the minimum supply voltage at which the MAX6385XS37D3-T guarantees correct reset output behavior?
The MAX6385XS37D3-T guarantees valid reset output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Detailed Description sections. This means the active-high RESET output remains correctly asserted or deasserted even during severe brownout conditions - a key differentiator from many competing supervisors that fail below 1.8V. This specification directly applies to the MAX6385XS37D3-T and is verified across temperature.
MAX6385XS37D3-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:
- 3.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS37D3-T FAQ
1.How can I place an order for MAX6385XS37D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS37D3-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 MAX6385XS37D3-T reliable?
The price and inventory of MAX6385XS37D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS37D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS37D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS37D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS37D3-T?
MAX6385XS37D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS37D3-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 MAX6385XS37D3-T?
For technical support, including MAX6385XS37D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS37D3-T requirements.
6.How does Aetrix verify that MAX6385XS37D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS37D3-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 MAX6385XS37D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS37D3-T?
All MAX6385XS37D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS37D3-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 MAX6385XS37D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS37D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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