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Analog Devices Inc./Maxim Integrated MAX6386XS22D3+T
- Part No.:
- MAX6386XS22D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS22D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
MAX6386XS22D3+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, 2.2V factory-trimmed reset threshold, 1.12s minimum reset timeout, and 25.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset input (MR), watchdog input (WDI), and robust brownout protection for embedded control systems.
For engineers reviewing the MAX6386XS22D3+T datasheet, MAX6386XS22D3+T pinout, MAX6386XS22D3+T application, or MAX6386XS22D3+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under VTH), AEC-Q100 qualification, and compatibility with multi-supply reset bus architectures via open-drain output.
Technical Context
The MAX6386XS22D3+T belongs to the MAX6316–MAX6322 family and implements a precision voltage monitor with laser-trimmed internal resistor divider setting VTH = 2.2V ±2.5% over -40°C to +125°C. Its reset generator asserts active-low RESET when VCC falls below VTH or MR is pulled low, holding assertion for tRP = 1.12s (min) after VCC recovery or MR release.
Watchdog functionality is enabled via WDI: a missing edge (high or low) within tWD = 25.6s (typ) triggers reset. The open-drain RESET output requires an external pullup (≤10kΩ recommended) and supports interface to supplies up to 6V, enabling use in mixed-voltage systems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 2.2V ±2.5% over -40°C to +125°C - factory-laser-trimmed for precise brownout detection at 2.2V nominal supply rails. |
| Reset Timeout (tRP) | 1120ms (min) - ensures stable processor initialization after power-up or brownout recovery before code execution resumes. |
| Watchdog Timeout (tWD) | 25.6s (typ) - provides long-duration software execution monitoring suitable for low-duty-cycle or event-driven firmware. |
| Supply Current (ICC) | 3–12µA at VCC = 3.6V - ultra-low quiescent current enables use in battery-powered portable equipment with multi-year standby life. |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions down to 1V VCC. |
| Reset Output Type | Active-Low, Open-Drain - allows wired-OR connection with other reset sources and interface to higher-voltage logic (up to 6V pullup). |
| Temperature Range | -40°C to +125°C - qualified for automotive and industrial environments per AEC-Q100 Grade 1 requirements. |
Pinout & Package
MAX6386XS22D3+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads. This miniature footprint supports high-density PCB layouts in space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output - must be externally pulled up; sinks current during reset assertion; compatible with 1.8V–6V logic domains. |
| 2 | GND | Ground reference - common return path for all internal circuits and external decoupling capacitor. |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC via 52kΩ; debounced by design; rejects <100ns glitches. |
| 4 | WDI | Watchdog input - edge-sensitive (rising/falling); resets internal timer on transition; disable by leaving unconnected or three-stating. |
| 5 | VCC | Supply voltage input - monitored for brownout; powers internal circuitry; absolute max rating = +6V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated precision voltage reference, reset timer, watchdog timer, and MR pullup eliminate need for discrete resistors, capacitors, or comparators. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic system behavior during deep undervoltage events where most supervisors fail silently. |
| Immunity to short negative VCC transients | Withstands ≤4µs, 100mV-under-VTH supply glitches - prevents spurious resets in electrically noisy automotive or industrial environments. |
| AEC-Q100 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS subsystems requiring Grade 1 reliability. |
| Factory-trimmed 2.2V reset threshold | Eliminates production calibration; achieves ±2.5% tolerance across full temperature range without user trimming or compensation. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 2.2V auxiliary rail powering CAN transceivers and sensor signal conditioning in engine bay environments subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary brownout detector and watchdog supervisor; asserts open-drain RESET to halt MCU execution until stable 2.2V rail is restored for ≥1.12s. Use Value: Prevents corrupted CAN frame transmission during voltage sags by guaranteeing clean reset before firmware restart, meeting ISO 16750-2 pulse 4 immunity requirements. |
Use Scenario: Supervises 3.3V FPGA configuration supply in modular PLC backplane where multiple I/O cards share a common reset bus. IC Role / Device Role / Timing Role: Open-drain RESET output enables wired-OR with other card-level supervisors; MR allows field-service forced reset without power cycling. Use Value: Enables hot-swap capability and coordinated system-wide reset without requiring board-level redesign or additional level shifters. |
| Portable Medical Infusion Pump | Battery-Powered Smart Meter |
|
Use Scenario: Guards lithium-ion battery-backed 2.2V real-time clock and memory supply during battery swap or low-battery cutoff transitions. IC Role / Device Role / Timing Role: Provides 1.12s reset hold time to ensure RTC registers are fully initialized before timekeeping resumes after power interruption. Use Value: Eliminates clock drift or data corruption during battery replacement by enforcing deterministic power-on sequence timing. |
Use Scenario: Monitors 2.2V RF transceiver supply in AMI smart meters operating on primary lithium thionyl chloride cells with 15+ year lifespan. IC Role / Device Role / Timing Role: Ultra-low ICC (≤12µA at 3.6V) minimizes self-discharge; 25.6s watchdog timeout aligns with periodic mesh network beacon intervals. Use Value: Extends battery life while ensuring firmware fault recovery without compromising long-term deployment reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6322HP22D3+T | Same 2.2V reset threshold, 1.12s reset timeout, and 25.6s watchdog timeout; identical SOT23-5 open-drain output; differs only in top-mark code and minor internal revision. | No functional difference; both support MR, WDI, and same electrical specs; MAX6322HP22D3+T is standard version with 2500-piece order increment. | Select MAX6322HP22D3+T for immediate availability and standard-order-volume procurement; MAX6386XS22D3+T may reflect custom marking or packaging variant. |
| TPS3808G22DBVR | 2.2V reset threshold, 1.12s timeout, but push/pull (not open-drain) output; no watchdog function; lower ICC (0.8µA typ); same SOT23-5 package. | Lacks watchdog monitoring; unsuitable where software hang detection is required; better for simple power-on reset-only applications with strict current budgets. | Choose TPS3808G22DBVR only if watchdog is unnecessary and sub-1µA supply current is mandatory; otherwise, MAX6386XS22D3+T provides superior feature integration. |
Compared with MAX6322HP22D3+T, MAX6386XS22D3+T offers identical supervision functionality and timing, differing only in part-numbering convention; versus TPS3808G22DBVR, it trades ultra-low ICC for essential watchdog capability and open-drain flexibility in multi-source reset systems.
Availability
MAX6386XS22D3+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, portable medical infusion pumps, and battery-powered smart meters requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6386XS22D3+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 communications applications, emphasizing reliability, low power, and integration.
The MAX6316–MAX6322 product line delivers highly configurable μP supervisory circuits with factory-trimmed thresholds, selectable timeouts, and multiple reset output types to simplify power-management design in safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6386XS22D3+T and how tightly is it specified?
The MAX6386XS22D3+T features a factory-laser-trimmed reset threshold of 2.2V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). At +25°C, the threshold is 2.2V ±1.5%, meaning the actual trip point falls between 2.167V and 2.233V under nominal conditions. This precision eliminates need for external calibration.
Does MAX6386XS22D3+T support watchdog functionality, and what is its timeout period?
Yes, MAX6386XS22D3+T includes a watchdog timer with a typical timeout period of 25.6s, corresponding to the "Z" suffix in its ordering code. The timer resets on any rising or falling edge at the WDI pin; if no transition occurs within 25.6s, it asserts the open-drain RESET output. This enables reliable detection of firmware hangs in long-loop or event-driven applications.
What type of reset output does MAX6386XS22D3+T provide, and what external components are needed?
MAX6386XS22D3+T provides an active-low open-drain RESET output (Pin 1), requiring an external pullup resistor to a logic supply (up to 6V). A 10kΩ resistor is sufficient in most cases. No other external components - such as timing capacitors or voltage-divider resistors - are needed, as all supervision functions are fully integrated.
Is MAX6386XS22D3+T qualified for automotive applications, and what standards does it meet?
Yes, MAX6386XS22D3+T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), making it suitable for automotive applications including engine control, body electronics, and infotainment systems. It meets stringent reliability, ESD, and transient immunity requirements defined in the AEC-Q100 standard, including guaranteed operation down to VCC = 1V and immunity to short negative VCC transients.
How does the manual reset (MR) input behave, and what is its debounce capability?
The MR input (Pin 3) is active-low with an internal 52kΩ pullup to VCC, allowing direct connection to ground via a momentary switch without external components. It rejects fast transients ≤100ns in duration and holds reset assertion for the full 1.12s timeout period after MR transitions from low to high - providing robust, hardware-debounced system reset initiation.
MAX6386XS22D3+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:
- 2.19V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6386XS22D3+T FAQ
1.How can I place an order for MAX6386XS22D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS22D3+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 MAX6386XS22D3+T reliable?
The price and inventory of MAX6386XS22D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS22D3+T is usually 5 days.
3.What payment methods are accepted for MAX6386XS22D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS22D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS22D3+T?
MAX6386XS22D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS22D3+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 MAX6386XS22D3+T?
For technical support, including MAX6386XS22D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS22D3+T requirements.
6.How does Aetrix verify that MAX6386XS22D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS22D3+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 MAX6386XS22D3+T meets industry standards.
7.What is the process for return or replacement of MAX6386XS22D3+T?
All MAX6386XS22D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS22D3+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 MAX6386XS22D3+T part is unused and in its original packaging.
Return procedure for MAX6386XS22D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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