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Analog Devices Inc./Maxim Integrated MAX6385XS22D4-T
- Part No.:
- MAX6385XS22D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,834
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Product details
Overview
MAX6385XS22D4-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.19V reset threshold (±2.5% over -40°C to +125°C), 1120ms VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered microcontroller systems and asserts RESET when VCC drops below threshold or MR is pulled low.
For engineers reviewing the MAX6385XS22D4-T datasheet, MAX6385XS22D4-T pinout, MAX6385XS22D4-T application, or MAX6385XS22D4-T equivalent, key selection criteria include guaranteed reset validity down to VCC = 1V, 3μA supply current at 1.8V, 4-pin SC70 package compatibility, and automotive-grade AEC-Q100 qualification (denoted by /V suffix - though this part lacks /V, it shares same temp range and package).
Technical Context
The MAX6385XS22D4-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 1120ms minimum reset timeout after VCC recovery or MR release.
It features an internal 63kΩ MR pullup resistor, supports TTL/CMOS-compatible MR logic, guarantees valid RESET output state down to VCC = 1V, and provides immunity to negative-going VCC transients up to 35µs (at 100mV overdrive), confirmed by Typical Operating Characteristics graphs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (nominal), ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges. |
| VCC Reset Timeout | 1120ms (min) - holds processor in reset long enough for power stabilization and clock lock in embedded systems. |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable devices. |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly. |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows momentary switch interface without external RC filtering. |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout, including post-power-down recovery to 1V. |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable PCBs. |
Pinout & Package
MAX6385XS22D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source; must be decoupled with 0.1µF capacitor near pin for transient immunity. |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion and low otherwise; sinks/source capability defined per Electrical Characteristics. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; logic low forces reset for ≥1µs pulse width. |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane with low-inductance path to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range - eliminates external resistor divider and calibration effort. |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic μP reset state even during severe brownout or backup battery fallback conditions. |
| Debounced manual reset input | Internal 63kΩ pullup and 100ns glitch rejection enable direct switch connection without external debounce circuitry. |
| Negative-going VCC transient immunity | Withstands ≤35µs glitches at 100mV overdrive - reduces false resets in noisy power environments like motor control or RF modules. |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on sensor nodes using CR2032 cells. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit (BCU) |
|---|---|
Use Scenario: Monitors 3.3V I/O supply in programmable logic controller modules exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: μP supervisory circuit providing power-on reset, brownout protection, and operator-initiated reset via front-panel button. Use Value: 1120ms timeout ensures stable FPGA configuration and peripheral initialization before firmware execution begins. |
Use Scenario: Supervises 5V domain powering door-lock actuators and interior lighting drivers in vehicle body electronics. IC Role / Device Role / Timing Role: Single-supply reset monitor with manual reset for service mode diagnostics and firmware updates. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents spurious resets during cold cranking or under-hood thermal cycling. |
| Portable Medical Glucose Meter | Smart Home Sensor Hub |
Use Scenario: Powers ARM Cortex-M0+ MCU and electrochemical sensor interface from single 3V coin cell with tight energy budget. IC Role / Device Role / Timing Role: Low-current supervisor ensuring safe boot after battery insertion or voltage sag during sensor excitation. Use Value: 3μA supply current extends CR2032 battery life beyond 5 years in standby, while 2.19V threshold matches typical LiMnO₂ discharge curve. |
Use Scenario: Manages power sequencing and fault recovery for Zigbee/Thread SoC, flash memory, and environmental sensors in battery-backed hub. IC Role / Device Role / Timing Role: Active-high push-pull reset generator synchronized to 3.3V rail stability and user-triggered factory reset. Use Value: Push-pull output eliminates external pullup, reducing BOM count and PCB area in compact 2-layer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS22D3-T | 140ms VCC reset timeout (vs. 1120ms); identical threshold, package, and MR functionality. | Suitable for fast-boot applications where short reset hold time is required (e.g., wearables with aggressive power cycling). | Select when faster release from reset is needed; verify μP reset deassertion timing meets minimum clock stabilization requirements. |
| MAX6326XR22D4-T | Same 2.19V threshold and 1120ms timeout, but no manual reset input (MR); 3-pin SC70 package (no MR pin). | Used in cost-sensitive, space-constrained designs where manual reset is unnecessary (e.g., sealed industrial sensors). | Choose when MR is unused - saves one PCB trace and simplifies layout, but removes field-service reset capability. |
Compared with MAX6385XS22D4-T, MAX6385XS22D3-T offers shorter reset hold time for rapid restarts, while MAX6326XR22D4-T removes MR to reduce pin count and cost - both retain identical threshold accuracy and temperature range but differ in reset duration and reset initiation flexibility.
Availability
MAX6385XS22D4-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical devices, smart home sensor hubs, and battery-powered edge AI nodes requiring stable component supply across extended temperature ranges.
Supply support for MAX6385XS22D4-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-power, AEC-Q100-capable μP supervisors for safety-critical and battery-operated systems where accurate voltage monitoring and deterministic reset timing are essential.
FAQ
What is the exact reset threshold voltage of MAX6385XS22D4-T?
The MAX6385XS22D4-T has a factory-set nominal reset threshold of 2.19V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is derived from the "22" suffix in the part number, referencing the Reset Threshold table where "22" corresponds to VTH(nom) = 2.19V, VTH(min) = 2.13V, and VTH(max) = 2.24V.
Does MAX6385XS22D4-T support manual reset functionality?
Yes, MAX6385XS22D4-T includes a debounced manual reset input (MR) pin with an internal 63kΩ pullup resistor to VCC. Driving MR low for ≥1µs asserts RESET, and the device holds reset active for the full 1120ms timeout after MR is released - enabling field-service or test-mode reset without external components.
What package type and dimensions does MAX6385XS22D4-T use?
MAX6385XS22D4-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.95mm. It is RoHS-compliant (indicated by the "+T" suffix) and rated for -40°C to +125°C operation, with thermal resistance θJA = 322.6°C/W on a multilayer PCB.
Is MAX6385XS22D4-T qualified for automotive applications?
While MAX6385XS22D4-T operates across the automotive temperature range (-40°C to +125°C) and shares design heritage with AEC-Q100-qualified variants (e.g., MAX6385XS22D4/V+T), the specific part number MAX6385XS22D4-T does not carry the "/V" suffix and is not officially AEC-Q100 certified. For automotive production, the /V version must be specified.
How does the reset timeout behavior differ between VCC recovery and manual reset on MAX6385XS22D4-T?
On MAX6385XS22D4-T, both VCC recovery and MR release trigger the same 1120ms minimum reset timeout period. Unlike MAX6390 (which has separate VCC and MR timeouts), MAX6385XS22D4-T uses a single fixed timeout - meaning RESET remains asserted for 1120ms regardless of whether the reset was initiated by undervoltage or manual input.
MAX6385XS22D4-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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS22D4-T FAQ
1.How can I place an order for MAX6385XS22D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D4-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 MAX6385XS22D4-T reliable?
The price and inventory of MAX6385XS22D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D4-T?
MAX6385XS22D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D4-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 MAX6385XS22D4-T?
For technical support, including MAX6385XS22D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D4-T requirements.
6.How does Aetrix verify that MAX6385XS22D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D4-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 MAX6385XS22D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D4-T?
All MAX6385XS22D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D4-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 MAX6385XS22D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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