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Analog Devices Inc./Maxim Integrated MAX6385XS40D5-T
- Part No.:
- MAX6385XS40D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS40D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,775
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Product details
Overview
The MAX6385XS40D5-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.0V reset threshold, 280ms minimum VCC reset timeout, and manual reset input. It monitors single-supply voltages from +1.8V to +5.0V at only 3μA supply current at +1.8V, ensuring reliable power-on reset assertion in battery-powered embedded controllers.
For engineers reviewing the MAX6385XS40D5-T datasheet, MAX6385XS40D5-T pinout, MAX6385XS40D5-T application, or MAX6385XS40D5-T equivalent, key selection criteria include its 4.0V ±2.5% threshold accuracy over –40°C to +125°C, guaranteed valid reset output down to VCC = 1V, and integrated 63kΩ MR pullup resistor enabling direct switch interface without external components.
Technical Context
This device implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across temperature, paired with a monolithic RC timer for deterministic 280ms reset timeout after VCC recovery. The active-high push-pull RESET output drives high during fault conditions and guarantees logic state validity down to VCC = 1V.
The manual reset (MR) input features internal 63kΩ pullup, TTL/CMOS-compatible thresholds, and 1µs minimum pulse width support. MR assertion forces reset independently of VCC level, with deassertion followed by full 280ms timeout - identical to the VCC-triggered timeout period.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.0V ±2.5% over –40°C to +125°C - ensures consistent brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 280ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout down to 1V |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and simplifies interface to μP reset input |
| MR Input Pullup | 63kΩ internal - allows direct connection of momentary switch to GND without external resistor |
| Reset Comparator Tempco | 60ppm/°C - limits threshold drift to <±20mV over full temperature range |
Pinout & Package
MAX6385XS40D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), footprint-compatible with industry-standard low-power supervisory ICs. Pin 1 = VCC, Pin 2 = RESET, Pin 3 = MR, Pin 4 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power Supply Input | Primary monitored voltage rail; powers internal circuitry and sets reset threshold reference |
| 2 (RESET) | Active-High Push-Pull Output | Drives high during reset condition; sinks current when low (deasserted); no external pullup required |
| 3 (MR) | Active-Low Manual Reset Input | Pulled high internally via 63kΩ; driven low to force immediate reset; debounced by design |
| 4 (GND) | Ground Reference | Common return path for VCC, RESET, and MR; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.0V threshold | Eliminates external resistor divider and calibration effort for fixed 4.0V supply monitoring |
| 280ms guaranteed reset timeout | Ensures μP core and peripherals fully stabilize before release, preventing boot failures |
| 3μA supply current at 1.8V | Extends battery life in portable medical devices and wireless sensor nodes beyond 10 years |
| MR input with 63kΩ internal pullup | Reduces BOM count by one resistor and enables direct switch-to-GND implementation |
| Valid RESET output down to VCC = 1V | Maintains deterministic reset state during severe brownout, avoiding undefined μP behavior |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 4.0V I/O supply rail in programmable logic controller during cold-cranking and load-dump transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M7 MCU until stable 4.0V rail is confirmed. Use Value: Prevents spurious firmware execution during 12V system voltage sag; 280ms timeout exceeds typical power-rail stabilization time. | Use Scenario: Ensures safe startup of body control unit after vehicle ignition, where 4.0V domain powers LIN transceivers and door-lock drivers. IC Role / Device Role / Timing Role: Active-high reset generator synchronized to 4.0V rail integrity, with MR supporting service-mode reinitialization. Use Value: Guarantees MCU reset remains asserted through worst-case 4.0V rail ramp-up (≤200ms), eliminating boot hangs. |
| Portable ECG Monitor | Smart Energy Meter |
Use Scenario: Supervises 4.0V analog front-end supply in battery-operated electrocardiogram device during low-battery shutdown. IC Role / Device Role / Timing Role: Low-power supervisor triggering controlled shutdown sequence when 4.0V rail drops below threshold. Use Value: 3μA quiescent current extends CR2032 battery life to >3 years; 4.0V threshold matches ADC reference stability point. | Use Scenario: Validates 4.0V RTC and secure element supply in utility meter during grid voltage fluctuations. IC Role / Device Role / Timing Role: Resets meter SoC if 4.0V backup rail falls due to capacitor aging or transformer dropout. Use Value: ±2.5% threshold accuracy ensures consistent trip point across -40°C to +85°C operating range, critical for metrology compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SXR40D5-T | Same 4.0V threshold and 280ms timeout, but no manual reset input; 3-pin SC70 package | Lacks MR functionality; suitable only for systems requiring VCC-only supervision | Select when MR is unnecessary and board space is constrained by 3-pin footprint |
| TPS3808G33DBVR | 3.3V threshold (not 4.0V); 200ms timeout; 1.8–6.0V operating range; SOT-23-5 package | Requires external resistor network to shift threshold to 4.0V; adds complexity and tolerance stack-up | Choose only if redesigning for 3.3V rail supervision or needing higher VCC max rating (6.0V) |
Compared with MAX809SXR40D5-T, MAX6385XS40D5-T adds MR capability in a 4-pin SC70 without increasing board area; versus TPS3808G33DBVR, it delivers exact 4.0V threshold without calibration overhead or additional components, reducing validation effort in safety-critical applications.
Availability
MAX6385XS40D5-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable ECG monitors, and smart energy meters requiring stable component supply with AEC-Q100-aligned reliability.
Supply support for MAX6385XS40D5-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 medical applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy voltage supervision for microprocessor-based systems where supply integrity directly impacts functional safety and data reliability.
FAQ
What is the exact reset threshold voltage of the MAX6385XS40D5-T?
The MAX6385XS40D5-T has a factory-set nominal reset threshold of 4.0V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This means the actual threshold falls between 3.90V and 4.10V at +25°C, and between 3.90V and 4.10V across temperature - verified per Maxim's Electrical Characteristics table.
Does the MAX6385XS40D5-T support manual reset functionality?
Yes, the MAX6385XS40D5-T includes a dedicated active-low manual reset (MR) input on Pin 3. It features an internal 63kΩ pullup resistor to VCC, allowing direct connection of a momentary switch to ground. When MR is pulled low, the device asserts the active-high RESET output immediately and holds it for the full 280ms timeout after MR is released.
What package type and pin count does the MAX6385XS40D5-T use?
The MAX6385XS40D5-T uses a 4-pin SC70 package (outline number 21-0098), with pinout: Pin 1 = VCC, Pin 2 = RESET, Pin 3 = MR, Pin 4 = GND. This RoHS-compliant, lead-free package measures 1.3mm × 1.6mm and is optimized for space-constrained PCB layouts in portable and automotive electronics.
What is the supply current consumption of the MAX6385XS40D5-T at different VCC levels?
The MAX6385XS40D5-T draws 3μA typical at +1.8V, 4μA at +2.5V, 6μA at +3.6V, and 7μA at +5.5V (no load). These values are specified over –40°C to +125°C and enable multi-year operation in battery-powered applications such as portable diagnostics equipment and remote sensors.
Is the MAX6385XS40D5-T qualified for automotive applications?
The MAX6385XS40D5-T is not explicitly marked with the /V automotive qualification suffix in its ordering code. While it operates across –40°C to +125°C and meets AEC-Q100 stress test requirements for the /V-trim versions in the MAX6381–MAX6390 family, this specific variant (XS40D5-T) is rated for industrial temperature range and lacks formal AEC-Q100 certification documentation.
MAX6385XS40D5-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:
- 4V
- 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
MAX6385XS40D5-T FAQ
1.How can I place an order for MAX6385XS40D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS40D5-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 MAX6385XS40D5-T reliable?
The price and inventory of MAX6385XS40D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS40D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS40D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS40D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS40D5-T?
MAX6385XS40D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS40D5-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 MAX6385XS40D5-T?
For technical support, including MAX6385XS40D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS40D5-T requirements.
6.How does Aetrix verify that MAX6385XS40D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS40D5-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 MAX6385XS40D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS40D5-T?
All MAX6385XS40D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS40D5-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 MAX6385XS40D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS40D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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