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Analog Devices Inc./Maxim Integrated MAX6385XS22D3-T
- Part No.:
- MAX6385XS22D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:27,500
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Product details
Overview
MAX6385XS22D3-T from Maxim Integrated is a precision active-high push-pull μP supervisory circuit designed for reliable power-on reset and brownout detection in low-voltage systems. It features a factory-set 2.19V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, 3μA supply current at +1.8V, and guaranteed valid reset output down to VCC = 1V. It is used in portable battery-powered equipment requiring stable, low-power reset assertion during voltage transients.
For engineers reviewing the MAX6385XS22D3-T datasheet, MAX6385XS22D3-T pinout, MAX6385XS22D3-T application, or MAX6385XS22D3-T equivalent, key selection criteria include its active-high push-pull output configuration, manual reset input with internal pullup, 4-pin SC70 package, and compatibility with dual-voltage monitoring architectures where auxiliary reset inputs are not required.
Technical Context
The MAX6385XS22D3-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer generating a fixed 140ms minimum reset timeout after VCC recovery. Its active-high push-pull output drives directly into microprocessor reset inputs without external pullups.
It integrates a debounced manual reset input (MR) with a 63kΩ internal pullup resistor, supporting TTL/CMOS-compatible logic levels and momentary switch interfaces. The device guarantees correct reset state assertion even as VCC drops to 1V, enabling robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V nominal (2.13V–2.24V range), factory-trimmed for precise brownout detection at core logic supply rails |
| VCC Reset Timeout | 140ms minimum, ensures sufficient processor initialization time after power stabilization |
| Supply Current | 3μA at +1.8V, enables multi-year battery life in always-on portable instrumentation |
| Operating Voltage Range | 1.0V to 5.5V, supports valid reset assertion down to 1V for fail-safe behavior during severe undervoltage |
| Reset Output Type | Active-high push-pull, eliminates need for external pullup resistors on μP reset lines |
| Manual Reset Input | MR with 63kΩ internal pullup, allows direct connection of normally-open switch to GND without external components |
| Temperature Range | -40°C to +125°C, qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6385XS22D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage rail; powers internal circuitry and serves as reset threshold reference |
| 2 | RESET | Active-high push-pull reset output; asserts high during fault and remains high for 140ms after VCC recovery |
| 3 | MR | Active-low manual reset input; forces reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.19V reset threshold | Eliminates external resistor divider, reduces BOM count and layout area in single-rail systems |
| 140ms minimum reset timeout | Guarantees full microcontroller initialization before code execution resumes after power-up |
| 3μA supply current at +1.8V | Extends battery runtime in energy-sensitive IoT sensors and wearables without compromising supervision integrity |
| Active-high push-pull output | Directly interfaces with standard μP reset pins, removing pullup resistor and associated leakage path |
| MR input with 63kΩ internal pullup | Enables simple mechanical switch integration-no external biasing or debounce circuitry required |
Applications
| Portable Power Management | Industrial Controller Supervision |
|---|---|
Use Scenario: Battery-powered handheld test instrument operating from a single Li-ion cell (2.7V–4.2V) with ultra-low standby current requirements. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET to hold microcontroller in reset until battery voltage stabilizes above 2.19V post-power-on. Use Value: Prevents erratic firmware execution during shallow discharge cycles while consuming only 3μA, extending operational life between charges. | Use Scenario: PLC I/O module powered by isolated 3.3V DC-DC converter in harsh industrial environment with EMI-induced voltage dips. IC Role / Device Role / Timing Role: Provides deterministic 140ms reset pulse upon any VCC dip below 2.19V, ensuring deterministic controller reboot without software intervention. Use Value: Guarantees system-level reliability under transient noise; MR pin allows field technician-initiated reset without opening enclosure. |
| Medical Diagnostic Handheld | Automotive Body Control Module |
Use Scenario: FDA-cleared point-of-care ultrasound probe with ARM Cortex-M4 MCU and analog front-end powered from regulated 2.8V rail. IC Role / Device Role / Timing Role: Supervises 2.8V supply and generates clean active-high reset signal synchronized to power rail stability, with MR support for user-triggered self-test. Use Value: Meets IEC 62304 safety requirements for reset integrity; ±2.5% threshold accuracy ensures consistent behavior across operating temperature range. | Use Scenario: Automotive BCM using 5V system rail derived from vehicle battery, subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Detects brownout events on 5V rail and asserts reset to prevent corrupted EEPROM writes during undervoltage; operates reliably down to VCC = 1V. Use Value: AEC-Q100 qualified variant available; negative-going transient immunity prevents spurious resets during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 2.93V reset threshold, 240ms timeout, no MR input, 3-pin SC70 package | Lacks manual reset capability; suited for simpler single-rail systems without operator-initiated reset needs | Select when higher threshold and longer timeout are acceptable and MR functionality is unnecessary |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms timeout, active-low open-drain output, requires external pullup | Output polarity and drive type differ; incompatible with active-high reset inputs without level-shifting | Choose only if system design accommodates active-low signaling and can provide external pullup |
Compared with MAX809TRD3-T and TPS3808G33DBVR, the MAX6385XS22D3-T uniquely combines 2.19V threshold, active-high push-pull output, and integrated MR input in a 4-pin SC70-enabling compact, low-component-count reset supervision for 2.2V–2.5V logic rails with field-serviceability.
Availability
MAX6385XS22D3-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial controllers, medical handhelds, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for MAX6385XS22D3-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.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for battery longevity and deterministic reset timing in space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6385XS22D3-T?
The MAX6385XS22D3-T has a factory-trimmed nominal reset threshold of 2.19V, with guaranteed limits of 2.13V (min) to 2.24V (max) over the full -40°C to +125°C temperature range. This value is confirmed in the Reset Thresholds table of the official datasheet and corresponds to the "22" suffix in the part number.
Does MAX6385XS22D3-T support manual reset functionality?
Yes, the MAX6385XS22D3-T includes a dedicated MR (manual reset) input pin with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 140ms timeout period after MR is released. This feature is explicitly documented in the Pin Description and Features sections of the MAX6385XS22D3-T datasheet.
What package type and pin count does MAX6385XS22D3-T use?
The MAX6385XS22D3-T uses a 4-pin SC70 package (outline number 21-0098), as specified in the Ordering Information table and Pin Configurations section. This surface-mount package measures 2.0mm × 2.1mm and is RoHS-compliant, indicated by the "+T" suffix in the part number.
Is MAX6385XS22D3-T compatible with microcontrollers requiring active-high reset inputs?
Yes, the MAX6385XS22D3-T provides an active-high push-pull reset output, meaning it drives the RESET pin high during fault conditions and holds it high for 140ms after VCC recovery. This matches the active-high reset requirement of many modern microcontrollers-including ARM Cortex-M series and certain PIC and MSP430 variants-without needing external level-shifting or pullup components.
What is the minimum operating voltage for valid reset assertion in MAX6385XS22D3-T?
The MAX6385XS22D3-T guarantees correct reset output logic state down to VCC = 1.0V, as stated in both the Absolute Maximum Ratings and Detailed Description sections. This ensures fail-safe reset behavior during deep brownout events, unlike many competing supervisors that cease valid output below 1.5V or 1.8V.
MAX6385XS22D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.19V
- 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
MAX6385XS22D3-T FAQ
1.How can I place an order for MAX6385XS22D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D3-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 MAX6385XS22D3-T reliable?
The price and inventory of MAX6385XS22D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D3-T?
MAX6385XS22D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D3-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 MAX6385XS22D3-T?
For technical support, including MAX6385XS22D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D3-T requirements.
6.How does Aetrix verify that MAX6385XS22D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D3-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 MAX6385XS22D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D3-T?
All MAX6385XS22D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D3-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 MAX6385XS22D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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