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Analog Devices Inc./Maxim Integrated MAX6385XS22D2-T
- Part No.:
- MAX6385XS22D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,039
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Product details
Overview
MAX6385XS22D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.19V reset threshold, 20ms minimum reset timeout, and manual reset input (MR), designed for reliable power-up/power-down monitoring in low-voltage embedded systems operating down to 1.0V VCC. It consumes only 3μA at 1.8V and guarantees valid reset output state down to VCC = 1V.
For engineers reviewing the MAX6385XS22D2-T datasheet, MAX6385XS22D2-T pinout, MAX6385XS22D2-T application, or MAX6385XS22D2-T equivalent, key selection considerations include its 2.19V ±2.5% threshold accuracy over –40°C to +125°C, MR debounce capability, SC70-4 package footprint, and compatibility with dual-rail voltage monitoring architectures requiring active-high reset assertion.
Technical Context
The MAX6385XS22D2-T implements a precision bandgap-based reset comparator with 60ppm/°C tempco and internal 63kΩ MR pullup resistor. Its reset logic asserts RESET high when VCC falls below 2.19V or MR is pulled low, holding the output active for ≥20ms after recovery.
It features negative-going VCC transient immunity up to 35µs for 100mV overdrive and guarantees correct RESET logic state across full 1.0V–5.5V VCC range - critical for brownout resilience in battery-powered and automotive-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (nominal), ±2.5% over –40°C to +125°C - ensures stable trip point across industrial temperature range |
| Reset Timeout | 20ms (minimum) - provides sufficient hold time for μP initialization without excessive system delay |
| VCC Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered devices |
| Output Type | Push-pull active-high - eliminates need for external pullup and supports direct connection to μP RESET pin |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch interface without external components |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout conditions |
| Reset Comparator Tempco | 60ppm/°C - minimizes threshold drift over temperature, improving long-term reliability |
Pinout & Package
MAX6385XS22D2-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, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Supply input and primary voltage monitor rail - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull output - drives high during reset; sinks current only during deassertion transition |
| 3 | GND | Reference ground for all internal comparators and output stage - requires low-impedance connection |
| 4 | MR | Active-low manual reset input - internally pulled up to VCC; logic low forces immediate reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic behavior during severe brownout - prevents spurious release before core logic stabilizes |
| Integrated MR pullup resistor | 63kΩ value enables direct switch-to-ground interface - removes need for discrete pullup and reduces BOM count |
| Negative-going VCC transient immunity | Rejects glitches ≤35µs wide at 100mV overdrive - improves robustness in electrically noisy environments |
| Low-power operation | 3μA supply current at 1.8V - extends battery life in portable instrumentation and IoT edge nodes |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit (BCU) |
|---|---|
|
Use Scenario: Monitors 3.3V I/O supply and 1.2V core rail in programmable logic controller modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Active-high push-pull supervisor asserting reset on VCC undervoltage or operator-initiated MR signal, with 20ms timeout ensuring firmware reload stability. Use Value: Prevents corrupted register writes during cold-crank voltage sag by maintaining reset until both rails stabilize above 2.19V. |
Use Scenario: Embedded in door module ECUs where 5V system rail powers CAN transceivers and 1.8V powers microcontroller core. IC Role / Device Role / Timing Role: Primary VCC supervisor with MR support for service-mode reinitialization; operates across AEC-Q100 Grade 2 temperature range. Use Value: Enables field-service reset via diagnostic tool without requiring ECU power cycle - MR input debounces switch bounce inherently. |
| Medical Wearable Sensor Hub | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Powers ultra-low-power sensor fusion node using CR2032 battery; monitors 1.8V LDO output feeding ARM Cortex-M0+. IC Role / Device Role / Timing Role: Low-quiescent-current (3μA) supervisor guaranteeing valid reset down to 1.0V VCC - critical for end-of-battery detection. Use Value: Extends usable battery life by >18 months versus higher-ICC alternatives while ensuring safe shutdown before brownout-induced data corruption. |
Use Scenario: Supervises 3.3V communication rail and 1.2V metrology ASIC supply in ANSI C12.22–compliant smart meters deployed outdoors. IC Role / Device Role / Timing Role: Dual-role supervisor: detects main rail failure and provides MR-triggered firmware recovery during HPLC firmware updates. Use Value: Eliminates need for separate MR conditioning circuit - integrated 63kΩ pullup meets IEC 61000-4-2 ESD immunity requirements without added components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 2.93V reset threshold, no MR input, SOT-23-3 package | Lacks manual reset capability and operates at higher voltage - suitable only for single-rail 3.3V systems without service access | Select when board space permits SOT-23 and MR functionality is unnecessary |
| TPS3808G125DBVR | 1.25V threshold, adjustable timeout via capacitor, 6-pin SOT-23 | Requires external timing capacitor and offers lower threshold - better for sub-1.8V core supplies but adds component count | Choose when precise timeout tuning or <1.8V monitoring is required, accepting larger footprint and BOM increase |
Compared with MAX809TRD2-T and TPS3808G125DBVR, the MAX6385XS22D2-T uniquely combines 2.19V threshold, 20ms fixed timeout, MR input, and SC70-4 packaging - making it optimal for compact, dual-voltage, service-accessible embedded designs where pin count and layout area are constrained.
Availability
MAX6385XS22D2-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical wearable sensor hubs, and smart energy meter MCU subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS22D2-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.
The MAX6381–MAX6390 family delivers single/dual low-voltage μP reset circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across –40°C to +125°C.
FAQ
What is the exact reset threshold voltage of the MAX6385XS22D2-T?
The MAX6385XS22D2-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 per Maxim's Reset Threshold table, and is confirmed in the Electrical Characteristics section of the datasheet under VTH specifications.
Does the MAX6385XS22D2-T support manual reset functionality?
Yes, the MAX6385XS22D2-T includes a dedicated MR (manual reset) input pin with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate active-high reset assertion, which remains active for the full 20ms timeout period after MR is released - enabling hardware-triggered system recovery without external components.
What package type and dimensions does the MAX6385XS22D2-T use?
The MAX6385XS22D2-T uses a 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pin pitch. This RoHS-compliant, lead-free package is optimized for high-density PCB layouts and supports reflow soldering per JEDEC J-STD-020 standards.
Can the MAX6385XS22D2-T operate reliably at VCC = 1.0V?
Yes, the MAX6385XS22D2-T guarantees correct RESET output logic state down to VCC = 1.0V - a key specification verified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout conditions where other supervisors may fail unpredictably.
Is the MAX6385XS22D2-T pin-compatible with legacy Maxim reset ICs like the MAX809?
No, the MAX6385XS22D2-T is not pin-compatible with the MAX809 series. While the datasheet states pin compatibility *within the MAX6381–MAX6390 family* and with certain older parts *in functional grouping*, the MAX6385XS22D2-T uses a 4-pin SC70 package with VCC/RESET/GND/MR pinout, whereas the MAX809 uses a 3-pin SOT-23 package with VCC/GND/RESET - requiring PCB layout revision for substitution.
MAX6385XS22D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS22D2-T FAQ
1.How can I place an order for MAX6385XS22D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D2-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 MAX6385XS22D2-T reliable?
The price and inventory of MAX6385XS22D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D2-T?
MAX6385XS22D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D2-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 MAX6385XS22D2-T?
For technical support, including MAX6385XS22D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D2-T requirements.
6.How does Aetrix verify that MAX6385XS22D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D2-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 MAX6385XS22D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D2-T?
All MAX6385XS22D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D2-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 MAX6385XS22D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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