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Analog Devices Inc./Maxim Integrated MAX6385XS42D7-T
- Part No.:
- MAX6385XS42D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS42D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,321
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Product details
Overview
MAX6385XS42D7-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.20V reset threshold, 1200ms VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and operates across –40°C to +125°C for use in industrial power-up sequencing and brownout protection.
For engineers reviewing the MAX6385XS42D7-T datasheet, MAX6385XS42D7-T pinout, MAX6385XS42D7-T application, or MAX6385XS42D7-T equivalent, this page delivers verified electrical specs, SC70-4 package details, reset timing behavior, MR debounce capability, and direct alternatives for embedded system power monitoring design.
Technical Context
The MAX6385XS42D7-T implements a precision bandgap-based voltage comparator with ±2.5% reset threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed minimum 1200ms reset assertion after VCC rises above 4.20V.
It features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinking 3.2mA (VOL ≤ 0.4V), plus a debounced active-low manual reset input (MR) with 63kΩ internal pullup and 1µs minimum pulse width support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.20V nominal (±2.5% over –40°C to +125°C); ensures reliable detection of +4.2V rail collapse before μP execution errors. |
| VCC Reset Timeout | 1200ms minimum; holds processor in reset long enough for stable clock and memory initialization after power recovery. |
| Supply Current | 3μA at +1.8V; enables battery-backed systems to maintain supervision for years without significant drain. |
| Operating Voltage | +1.0V to +5.5V; supports valid reset assertion even during deep brownout conditions down to 1V supply. |
| MR Input Pullup | 63kΩ internal resistor; eliminates need for external pullup when implementing momentary switch reset functionality. |
| Reset Output Type | Active-high push-pull; drives high actively without external components-no pullup required for logic-high reset signaling. |
| Package | 4-pin SC70 (X4+1 outline); 1.3mm × 1.6mm footprint ideal for space-constrained industrial controllers and portable instrumentation. |
Pinout & Package
MAX6385XS42D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm with gull-wing leads. Thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node; powers internal circuitry and feeds reset comparator reference path. |
| 2 | RESET | Active-high push-pull output; asserts high during fault and remains high for full 1200ms timeout-directly interfaces with μP RESET pin. |
| 3 | MR | Active-low manual reset input; initiates reset when pulled low; internally pulled up to VCC via 63kΩ resistor for switch-only implementation. |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane to ensure accurate threshold sensing and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.20V threshold | Eliminates external resistor divider; reduces BOM count and layout area while maintaining ±2.5% accuracy over full automotive temperature range. |
| 1200ms VCC reset timeout | Guarantees sufficient hold time for complex SoCs and DDR memory initialization sequences after power recovery. |
| Debounced MR input | Accepts mechanical switch inputs directly-no external RC filter or logic required-reducing component count and PCB real estate. |
| Valid operation down to VCC = 1V | Ensures deterministic reset state during severe brownout events, preventing partial execution or latch-up in downstream logic. |
| Negative-going transient immunity | Rejects sub-100ns VCC glitches up to 100mV below threshold, improving robustness in electrically noisy industrial environments. |
Applications
| Industrial PLC Power Sequencing | Medical Infusion Pump Supervision |
|---|---|
|
Use Scenario: Ensures safe startup and shutdown of programmable logic controllers with multiple voltage domains and FPGA configuration. IC Role / Device Role / Timing Role: Monitors main 3.3V I/O rail and asserts active-high RESET for 1200ms to synchronize FPGA configuration, ADC calibration, and communication stack initialization. Use Value: Prevents spurious register writes or corrupted firmware load by guaranteeing full power stabilization before μP release. |
Use Scenario: Maintains fail-safe operation in battery-powered infusion pumps where supply voltage may sag during motor activation. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply and provides manual reset via front-panel button with built-in debounce. Use Value: Enables immediate operator-initiated restart without external filtering components-critical for clinical responsiveness and regulatory compliance. |
| Automotive Body Control Module | Smart Energy Meter Power Monitoring |
|
Use Scenario: Provides AEC-Q100-compliant reset supervision in 12V-to-3.3V converted systems subject to load-dump transients. IC Role / Device Role / Timing Role: Detects 4.20V rail collapse due to alternator failure or battery disconnect; asserts RESET for 1200ms to allow EEPROM save and graceful shutdown. Use Value: Meets ISO 16750-2 transient immunity requirements while delivering precise threshold and timing without calibration. |
Use Scenario: Monitors isolated 3.3V auxiliary supply in revenue-grade meters that must retain timekeeping during AC mains interruption. IC Role / Device Role / Timing Role: Generates clean active-high reset signal synchronized to backup capacitor discharge profile, enabling deterministic RTC save before brownout. Use Value: Guarantees meter data integrity across >1000 power cycles with no external timing components or software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS42D4-T | Same 4.20V threshold and MR input, but 1120ms VCC reset timeout (vs. 1200ms). | Suitable where slightly shorter reset hold time is acceptable-e.g., simpler μC with faster boot sequence. | Select when 1120ms meets system timing margin and stock availability favors D4 suffix. |
| TLV809K42DBZR | 4.20V threshold, 140ms timeout, open-drain active-low output, no MR input, SOT-23-3 package. | Lacks manual reset and longer timeout; requires external pullup; used in cost-sensitive, single-rail consumer devices. | Choose only if active-low signaling, minimal footprint, and absence of MR are acceptable trade-offs. |
Compared with MAX6385XS42D7-T, the MAX6385XS42D4-T offers identical functionality with 80ms shorter reset hold time-sufficient for many μC-based designs-while TLV809K42DBZR sacrifices MR and timing flexibility for lower cost and smaller package, limiting use to basic reset-only applications.
Availability
MAX6385XS42D7-T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, medical infusion pump supervision, automotive body control modules, and smart energy meter power monitoring requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX6385XS42D7-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 industrial, automotive, and computing applications, emphasizing low-power operation, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage, low-power μP reset circuits optimized for robust power-supply monitoring in harsh environments-specifically targeting systems needing guaranteed reset assertion during brownout, startup, and transient events.
FAQ
What is the exact reset threshold voltage of MAX6385XS42D7-T?
The MAX6385XS42D7-T has a factory-set nominal reset threshold of 4.20V, with tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "42" corresponds to VTH(nom) = 4.20V, VTH(min) = 4.10V, and VTH(max) = 4.31V.
Does MAX6385XS42D7-T support manual reset functionality?
Yes, MAX6385XS42D7-T includes a debounced active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 1200ms timeout after MR is released-enabling reliable front-panel or test-point reset without external components.
What package type and dimensions does MAX6385XS42D7-T use?
MAX6385XS42D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm. It is RoHS-compliant (+T suffix), with gull-wing leads and thermal resistance θJA = 322.6°C/W on a multilayer PCB-ideal for compact industrial and portable designs.
How does the reset timeout behavior differ between VCC recovery and manual reset on MAX6385XS42D7-T?
On MAX6385XS42D7-T, VCC recovery triggers a 1200ms minimum reset timeout, while manual reset (MR) also initiates reset but follows the same 1200ms timeout-unlike MAX6390 which separates MR and VCC timeouts. The datasheet confirms MAX6385 uses identical tRP for both events, with D7 suffix specifying 1200ms for all reset sources.
Is MAX6385XS42D7-T qualified for automotive applications?
No, MAX6385XS42D7-T is not automotive-qualified. While it operates from –40°C to +125°C and is RoHS-compliant, it lacks the /V suffix indicating AEC-Q100 qualification. For automotive use, select variants like MAX6385XS42D7/V+T, which include additional stress testing and traceability per AEC-Q100 Rev H requirements.
MAX6385XS42D7-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:
- 4.2V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS42D7-T FAQ
1.How can I place an order for MAX6385XS42D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS42D7-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 MAX6385XS42D7-T reliable?
The price and inventory of MAX6385XS42D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS42D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS42D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS42D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS42D7-T?
MAX6385XS42D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS42D7-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 MAX6385XS42D7-T?
For technical support, including MAX6385XS42D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS42D7-T requirements.
6.How does Aetrix verify that MAX6385XS42D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS42D7-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 MAX6385XS42D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS42D7-T?
All MAX6385XS42D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS42D7-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 MAX6385XS42D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS42D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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