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Analog Devices Inc./Maxim Integrated MAX6385XS40D2-T
- Part No.:
- MAX6385XS40D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS40D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
MAX6385XS40D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.00V reset threshold, 20ms minimum reset timeout, and manual reset input (MR), operating from 1.0V to 5.5V supply while consuming only 3μA at 1.8V - used in battery-powered controllers and critical μP power monitoring systems.
For engineers reviewing the MAX6385XS40D2-T datasheet, MAX6385XS40D2-T pinout, MAX6385XS40D2-T application, or MAX6385XS40D2-T equivalent, this page delivers verified electrical specs, SC70-4 package details, MR timing behavior, reset accuracy over temperature, and direct alternatives for industrial embedded and automotive-grade designs.
Technical Context
The MAX6385XS40D2-T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed +4.00V threshold (±2.5% over −40°C to +125°C) and asserts an active-high push-pull RESET output for ≥20ms after VCC recovers. It includes a debounced manual reset input (MR) with internal 63kΩ pullup, guaranteed functional down to VCC = 1V.
Unlike open-drain variants, its push-pull output drives high actively during reset assertion and low when deasserted, eliminating need for external pullup. The device supports negative-going VCC transient immunity up to 35µs at 100mV overdrive and features glitch rejection on MR input (100ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | +4.00V nominal, ±2.5% over −40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges. |
| Reset Timeout | 20ms minimum - guarantees sufficient processor initialization time after power recovery before release. |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable instrumentation. |
| MR Input Pullup | 63kΩ internal resistor - allows direct connection of momentary switch to GND without external components. |
| VCC Operating Range | 1.0V to 5.5V - supports legacy 5V logic and modern sub-2V SoC core supplies in same design. |
| Reset Output Type | Active-high push-pull - provides rail-to-rail logic levels without external biasing, compatible with TTL/CMOS inputs. |
| MR Pulse Width | 1μs minimum - accommodates fast digital control signals and avoids false triggers from noise. |
Pinout & Package
MAX6385XS40D2-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 PCB layouts in portable and automotive modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source - 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; valid down to VCC = 1V. |
| 3 | GND | Analog and digital ground reference - requires low-impedance connection to system ground plane for accurate threshold sensing. |
| 4 | MR | Active-low manual reset input - internally pulled up to VCC; asserting low forces reset for ≥20ms after release; no external debounce needed. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | +4.00V with ±2.5% tolerance over full temperature range - eliminates need for external resistor dividers or calibration. |
| Guaranteed operation down to VCC = 1V | RESET output remains logically valid even during deep brownout - prevents undefined processor states in failing power conditions. |
| Integrated MR pullup resistor | 63kΩ internal pullup - reduces BOM count and layout area; supports direct switch-to-GND interface without discrete resistors. |
| Negative-going VCC transient immunity | Rejects glitches ≤35µs wide at 100mV overdrive - improves robustness in noisy automotive or industrial power environments. |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes and portable medical devices. |
Applications
| Industrial PLC Controller Power Monitoring | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitors 5V system rail in programmable logic controller during cold-cranking and load-dump events. IC Role / Device Role / Timing Role: Supervisory circuit providing active-high reset pulse to ARM Cortex-M7 MCU upon VCC dip below 4.00V. Use Value: Ensures deterministic boot sequence after voltage recovery with 20ms timeout - prevents firmware corruption during engine start transients. |
Use Scenario: Embedded in door module for monitoring 3.3V I/O supply alongside 12V battery input. IC Role / Device Role / Timing Role: Active-high reset generator triggered by MR button press or VCC sag, interfacing directly with CAN-enabled microcontroller. Use Value: Eliminates external pullup and debounce components - reduces footprint and cost in AEC-Q100–qualified modules. |
| Portable Medical Glucose Meter | Dual-Voltage IoT Sensor Node |
Use Scenario: Powers on/off sequence control in battery-operated handheld diagnostic device using CR2032 coin cell. IC Role / Device Role / Timing Role: Resets ultra-low-power MSP430 MCU when 3.0V supply drops below 4.00V threshold due to battery depletion. Use Value: 3μA supply current extends shelf life; 20ms reset hold time ensures complete ADC initialization before measurement cycle. |
Use Scenario: Simultaneous monitoring of 1.8V RF SoC core and 3.3V sensor interface rails in LPWAN edge node. IC Role / Device Role / Timing Role: Single-supply supervisor asserting reset if either rail fails - MR pin enables field-service firmware reload via test point. Use Value: Push-pull output drives both logic families directly; MR input supports factory programming and field diagnostics without added circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR40D2+T | Same 4.00V threshold and 20ms timeout, but active-low open-drain output requiring external pullup resistor. | Suitable where system-level reset bus is shared with other open-drain devices (e.g., I²C-compatible reset networks). | Select when interoperability with legacy open-drain reset architectures is required; not drop-in due to output polarity and drive type. |
| TLV809E40DBZR | 4.00V threshold, 200ms timeout (not 20ms), active-low push-pull, 1.8–6V supply, 1.6μA typical ICC. | Better suited for applications needing longer reset hold time and lower current, but incompatible timing for fast-boot systems. | Choose only if 200ms timeout meets system requirements; MAX6385XS40D2-T offers tighter timing control and higher temperature grade (−40°C to +125°C vs. −40°C to +125°C, same). |
Compared with MAX6326XR40D2+T and TLV809E40DBZR, MAX6385XS40D2-T uniquely combines active-high push-pull drive, precise 20ms timeout, and AEC-Q100–capable performance - making it optimal for space-constrained, fast-booting automotive and industrial controllers requiring minimal external components.
Availability
MAX6385XS40D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical devices, and dual-voltage IoT sensor nodes requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX6385XS40D2-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, emphasizing low power, high reliability, and small form factor.
MAX6385XS40D2-T belongs to the MAX6381–MAX6390 family of low-power μP supervisors - engineered specifically for robust power monitoring in battery-powered, automotive, and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6385XS40D2-T and how stable is it over temperature?
The MAX6385XS40D2-T has a factory-set nominal reset threshold of +4.00V, with guaranteed tolerance of ±2.5% over the full operating temperature range of −40°C to +125°C. This stability is achieved through laser-trimmed bandgap references and low-tempco design, ensuring consistent brownout detection in automotive and industrial environments without external calibration.
Does MAX6385XS40D2-T support manual reset functionality, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS40D2-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, MR must be driven below 0.3×VCC (for VTH < 4V) for ≥1μs. The pin accepts TTL/CMOS logic levels and requires no external components - a normally open switch from MR to GND suffices for user-initiated reset.
What package type and dimensions does MAX6385XS40D2-T use, and is it RoHS-compliant?
MAX6385XS40D2-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. Land pattern 90-0187 is recommended for reliable reflow soldering on multilayer PCBs.
How does the reset timeout behavior differ between VCC recovery and manual reset release on MAX6385XS40D2-T?
MAX6385XS40D2-T applies the same 20ms minimum timeout period for both VCC recovery and MR release - unlike MAX6390 which separates VCC and MR timeouts. After VCC rises above 4.00V or MR is released, RESET remains asserted for ≥20ms before deasserting, ensuring uniform timing control regardless of reset trigger source.
Can MAX6385XS40D2-T operate reliably at VCC = 1.0V, and what is the RESET output behavior at that voltage?
Yes, MAX6385XS40D2-T guarantees correct RESET output logic state down to VCC = 1.0V. At 1.0V, the active-high push-pull output maintains VOL ≤ 0.3V (sink capability 80μA) and VOH ≥ 0.8×VCC - ensuring valid CMOS-compatible levels even during deep brownout, preventing undefined microprocessor states.
MAX6385XS40D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS40D2-T FAQ
1.How can I place an order for MAX6385XS40D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS40D2-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 MAX6385XS40D2-T reliable?
The price and inventory of MAX6385XS40D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS40D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS40D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS40D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS40D2-T?
MAX6385XS40D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS40D2-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 MAX6385XS40D2-T?
For technical support, including MAX6385XS40D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS40D2-T requirements.
6.How does Aetrix verify that MAX6385XS40D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS40D2-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 MAX6385XS40D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS40D2-T?
All MAX6385XS40D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS40D2-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 MAX6385XS40D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS40D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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