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Analog Devices Inc./Maxim Integrated MAX6385XS37D1-T
- Part No.:
- MAX6385XS37D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS37D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
The MAX6385XS37D1-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), 1ms minimum reset timeout, and manual reset input. It monitors VCC from +1.8V to +5.0V while drawing only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered controllers and portable instrumentation for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS37D1-T datasheet, MAX6385XS37D1-T pinout, MAX6385XS37D1-T application, or MAX6385XS37D1-T equivalent, key selection criteria include its 3.70V reset threshold accuracy, 1ms timeout timing, SC70-4 package footprint, MR debounced manual reset capability, and compatibility with dual-voltage monitoring systems requiring guaranteed reset assertion during VCC transients.
Technical Context
This device implements a precision voltage comparator with internal 1.27V reference for VCC monitoring and includes a dedicated manual reset input (MR) with internal 63kΩ pullup resistor. Its reset logic asserts an active-high signal when VCC falls below 3.70V or MR is pulled low, holding the output high for ≥1ms after recovery.
The MAX6385XS37D1-T operates across –40°C to +125°C, maintains ±2.5% reset threshold accuracy over temperature, and provides negative-going VCC transient immunity up to 35µs at 100mV overdrive - enabling robust operation in noisy industrial and automotive environments without external debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.70V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures accurate brownout detection across full industrial temperature range |
| Reset Timeout | 1ms (minimum) - provides sufficient hold time for microcontroller initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable devices |
| Operating Voltage | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset inputs |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external components |
| Transient Immunity | 35µs max duration for 100mV VCC glitch - prevents spurious resets from short supply noise spikes |
Pinout & Package
MAX6385XS37D1-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, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1µF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives high during reset assertion; sinks current when deasserted |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup to VCC; logic low forces reset for ≥1ms after release |
| 4 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.70V with ±2.5% accuracy over –40°C to +125°C - eliminates need for external resistor divider calibration |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in always-on IoT sensors and wearables |
| Guaranteed reset validity | Operates down to VCC = 1V - ensures deterministic reset behavior during deep undervoltage events |
| Integrated MR debounce | No external RC network required - reduces BOM count and PCB area in handheld test equipment |
| SC70-4 footprint compatibility | Pins match industry-standard 4-pin SC70 layout - enables drop-in replacement in existing layouts using same land pattern |
Applications
| Portable Power Management | Industrial Controller Monitoring |
|---|---|
Use Scenario: Battery-powered handheld meter with Li-ion supply and MCU requiring clean power-on reset and brownout recovery. IC Role / Device Role / Timing Role: Supervises VCC rail and asserts active-high RESET to hold MCU in reset until stable 3.3V supply is established. Use Value: 3μA supply current extends battery life; 3.70V threshold matches typical 3.3V LDO dropout margin; 1ms timeout satisfies ARM Cortex-M0+ reset timing requirements. | Use Scenario: PLC I/O module operating in harsh factory environment with fluctuating 24VDC-derived 3.3V rail. IC Role / Device Role / Timing Role: Monitors local 3.3V domain and provides glitch-immune reset assertion during EMI-induced VCC dips. Use Value: 35µs transient immunity prevents false resets from motor drive noise; –40°C to +125°C rating ensures reliability in uncooled enclosures. |
| Medical Diagnostic Handset | Dual-Voltage Embedded System |
Use Scenario: FDA-cleared point-of-care ultrasound probe with ultra-low-power sleep mode and instant wake-up requirement. IC Role / Device Role / Timing Role: Generates precise reset pulse on power-up and manual button press, interfacing directly to low-threshold reset pin of medical-grade SoC. Use Value: Active-high push-pull output eliminates pullup resistor; MR input enables field-serviceable hard reset without opening enclosure. | Use Scenario: FPGA-based data acquisition board with separate 1.2V core and 3.3V I/O supplies. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V rail; coordinated with secondary supervisor (e.g., MAX6387) on 1.2V rail via shared RESET line. Use Value: Pin-compatible with MAX6387/MAX6388 family - allows unified layout for multi-rail monitoring with minimal redesign effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS37D2-T | Same 3.70V threshold and MR input, but 20ms reset timeout instead of 1ms | Suitable for systems requiring longer reset hold time for complex boot sequences | Select when firmware initialization exceeds 1ms; otherwise MAX6385XS37D1-T preferred for fast-boot applications |
| TLV803EB37DBZR | 3.7V threshold, 140ms timeout, no manual reset input, SOT-23-3 package | Lacks MR functionality and uses smaller 3-pin footprint - not pin-compatible | Choose only if MR is unused and PCB layout allows SOT-23-3 rework; verify 140ms timeout meets system boot timing |
Compared with MAX6385XS37D2-T and TLV803EB37DBZR, the MAX6385XS37D1-T uniquely delivers 1ms reset timing with MR support in a 4-pin SC70 - optimizing for rapid-boot, field-serviceable embedded systems where minimal timeout and manual intervention are both required.
Availability
MAX6385XS37D1-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial controllers, medical handsets, and dual-voltage embedded systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6385XS37D1-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and small-footprint solutions.
The MAX6381–MAX6390 family targets microprocessor supervisory functions in space- and power-constrained systems, delivering factory-trimmed reset thresholds, multiple timeout options, and integrated manual reset - all in sub-2mm SC70 packages.
FAQ
What is the exact reset threshold voltage of the MAX6385XS37D1-T?
The MAX6385XS37D1-T has a nominal reset threshold of 3.70V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is factory-trimmed and does not require external calibration. The "37" suffix in the part number explicitly denotes the 3.70V threshold per Maxim's ordering guide, and the device asserts reset when VCC falls below this level.
Does the MAX6385XS37D1-T support manual reset functionality?
Yes, the MAX6385XS37D1-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset, which remains asserted for the full 1ms timeout period after MR is released. No external components are needed - a simple momentary switch from MR to GND suffices, making it ideal for field-serviceable portable devices using the MAX6385XS37D1-T.
What package type and dimensions does the MAX6385XS37D1-T use?
The MAX6385XS37D1-T is packaged in a lead-free, RoHS-compliant 4-pin SC70 (SOT-323) package with outline number 21-0098 and land pattern 90-0187. Its dimensions are 2.0mm × 2.1mm × 0.95mm, and it features gull-wing leads compatible with standard reflow soldering processes. This compact footprint is identical to other 4-pin SC70 supervisors in the MAX6381–MAX6390 family.
Can the MAX6385XS37D1-T operate reliably at very low supply voltages?
Yes, the MAX6385XS37D1-T guarantees correct reset output logic state down to VCC = 1.0V, and operates across a full supply range of +1.0V to +5.5V. Its internal circuitry remains functional and the reset output remains valid even during deep brownout conditions - a critical feature for battery-powered systems where voltage may sag below nominal levels before shutdown.
How does the MAX6385XS37D1-T handle power supply transients?
The MAX6385XS37D1-T provides built-in immunity to negative-going VCC transients: it will not assert spurious resets for glitches up to 35µs duration when the overdrive (VTH – VCC) is 100mV. This is achieved through internal filtering and comparator hysteresis. For enhanced immunity, Maxim recommends placing a 0.1µF ceramic capacitor as close as possible to the VCC pin - a design practice validated in the MAX6385XS37D1-T typical operating circuit.
MAX6385XS37D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS37D1-T FAQ
1.How can I place an order for MAX6385XS37D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS37D1-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 MAX6385XS37D1-T reliable?
The price and inventory of MAX6385XS37D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS37D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS37D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS37D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS37D1-T?
MAX6385XS37D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS37D1-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 MAX6385XS37D1-T?
For technical support, including MAX6385XS37D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS37D1-T requirements.
6.How does Aetrix verify that MAX6385XS37D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS37D1-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 MAX6385XS37D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS37D1-T?
All MAX6385XS37D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS37D1-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 MAX6385XS37D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS37D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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