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Analog Devices Inc./Maxim Integrated MAX6385XS32D1-T
- Part No.:
- MAX6385XS32D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS32D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,833
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Product details
Overview
MAX6385XS32D1-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.20V reset threshold, 1ms minimum reset timeout, and manual reset input (MR), designed for reliable power-on reset assertion in low-voltage embedded systems operating from +1.8V to +5.0V supply rails. It consumes only 3μA at +1.8V and guarantees valid reset output down to VCC = 1V.
For engineers reviewing the MAX6385XS32D1-T datasheet, MAX6385XS32D1-T pinout, MAX6385XS32D1-T application, or MAX6385XS32D1-T equivalent, key selection criteria include its 3.20V ±2.5% threshold accuracy over –40°C to +125°C, 4-pin SC70 package footprint, MR debounce capability, and compatibility with critical μP power-monitoring requirements in space-constrained portable designs.
Technical Context
The MAX6385XS32D1-T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 3.20V threshold, with internal timer logic enforcing a guaranteed minimum 1ms reset assertion after VCC recovery. Its MR input features an internal 63kΩ pullup resistor and supports TTL/CMOS-compatible logic levels.
Reset assertion occurs on VCC drop below 3.20V or MR low pulse ≥1µs, with glitch rejection of 100ns and MR-to-reset delay of 200ns. The active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after timeout, ensuring deterministic μP initialization without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2.5% over –40°C to +125°C - ensures stable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 1ms minimum - provides sufficient hold time for slow-ramping power supplies before μP release |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in always-on sensor nodes and portable equipment |
| Operating Voltage Range | +1.0V to +5.5V - supports operation down to near-dead-battery conditions while interfacing with 1.8V/2.5V/3.3V/5V logic |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup and enables direct switch-to-GND manual reset |
| RESET Output Type | Active-high push-pull - delivers rail-to-rail logic levels without external pullup, simplifying interface to μP reset inputs |
| VCC Reset Delay | 35µs - ensures fast response to rapid supply transients while rejecting sub-35µs noise spikes |
Pinout & Package
MAX6385XS32D1-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 high-density PCB layouts in portable and automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - asserts high during VCC undervoltage or MR activation, deasserts after timeout |
| 3 | GND | Analog and digital ground reference - requires low-impedance connection to system ground plane |
| 4 | MR | Active-low manual reset input - internally pulled up to VCC; drive low ≥1µs to force reset, no external debounce needed |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.20V threshold | Eliminates external resistor divider and calibration effort for precise 3.3V I/O rail supervision |
| 1ms minimum reset timeout | Meets JEDEC JESD8-12B requirements for 3.3V μP power-up sequencing with margin |
| 63kΩ internal MR pullup | Reduces BOM count by removing external resistor and enables direct tactile switch integration |
| 3μA supply current at +1.8V | Extends battery runtime in coin-cell-powered IoT edge devices beyond 10 years in sleep mode |
| Valid RESET down to VCC = 1V | Ensures fail-safe reset assertion during deep brownout, preventing μP lockup or code corruption |
Applications
| Industrial PLC Controller | Medical Wearable Sensor Hub |
|---|---|
Use Scenario: Supervises 3.3V I/O supply and 1.8V core rail in programmable logic controller CPU module during cold start and line sag events. IC Role / Device Role / Timing Role: Primary VCC supervisor generating active-high reset signal to ARM Cortex-M7 processor upon undervoltage detection. Use Value: Prevents firmware execution errors during unstable power ramp-up, with 1ms timeout matching processor's minimum reset hold requirement. | Use Scenario: Monitors battery-backed 3.2V analog front-end supply in continuous glucose monitor worn on skin. IC Role / Device Role / Timing Role: Active-high reset generator triggered by MR button press or VCC dip, ensuring clean sensor ADC reinitialization. Use Value: 3μA quiescent current extends CR2032 battery life to >24 months; 3.20V threshold aligns precisely with LDO output tolerance. |
| Automotive Body Control Module | Smart Home Energy Monitor |
Use Scenario: Provides AEC-Q100-compliant reset supervision for 3.3V microcontroller in door module exposed to load-dump transients. IC Role / Device Role / Timing Role: Push-pull active-high supervisor with negative-going transient immunity up to 35µs at 100mV overdrive. Use Value: Guarantees reset assertion during ISO 7637-2 Pulse 1/2a events without false triggering, meeting ASIL-B functional safety prerequisites. | Use Scenario: Resets ESP32-based metering SoC when AC/DC adapter output dips below 3.2V during grid sags. IC Role / Device Role / Timing Role: Standalone reset IC interfacing directly to ESP32's active-high reset pin, eliminating level-shifter complexity. Use Value: 4-pin SC70 footprint saves 60% board area vs. legacy SOT-23 solutions, enabling compact DIN-rail enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR32D1+T | Same 3.20V threshold and 1ms timeout, but active-low open-drain output requiring external pullup | Suitable where system reset net is shared with multiple devices using wired-OR topology | Select if legacy board uses open-drain reset bus; otherwise MAX6385XS32D1-T reduces component count |
| TPS3808G32DBVR | 3.2V threshold, 1.25ms min timeout, 2.5μA ICC at +1.8V, but no MR input | Used in cost-sensitive consumer electronics where manual reset is unnecessary | Choose when MR functionality is not required and ultra-low current (<3μA) is critical |
Compared with MAX6326XR32D1+T and TPS3808G32DBVR, MAX6385XS32D1-T uniquely combines active-high push-pull output, integrated MR, and 3.20V precision threshold in a 4-pin SC70 - delivering lowest system-level BOM cost and smallest footprint for new designs requiring manual reset capability.
Availability
MAX6385XS32D1-T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical wearable sensor hubs, automotive body control modules, and smart home energy monitors requiring stable component supply with full AEC-Q100 qualification support.
Supply support for MAX6385XS32D1-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 family was engineered to deliver ultra-low-power, precision voltage supervision in miniature packages for battery-powered and space-constrained embedded systems demanding high reliability across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6385XS32D1-T?
The MAX6385XS32D1-T has a factory-set reset threshold of 3.20V, with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "32" corresponds to nominal 3.20V), and applies specifically to the MAX6385XS32D1-T variant-not the broader MAX6385 family.
Does the MAX6385XS32D1-T support manual reset functionality?
Yes, the MAX6385XS32D1-T includes a debounced manual reset input (MR) on pin 4. It features an internal 63kΩ pullup resistor to VCC, accepts TTL/CMOS logic levels, and requires only a ≥1µs low pulse to assert reset. No external debounce circuitry is needed, and the MR function is fully documented in the Pin Description and Applications Information sections of the MAX6385XS32D1-T datasheet.
What package type and dimensions does the MAX6385XS32D1-T use?
The MAX6385XS32D1-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is explicitly listed in the Ordering Information table for MAX6385XS_ _D_+T variants and validated in the Package Information section of the MAX6385XS32D1-T datasheet.
What is the minimum reset timeout period for the MAX6385XS32D1-T?
The MAX6385XS32D1-T has a minimum reset timeout period of 1ms, corresponding to the "D1" suffix in its part number. This value is guaranteed across –40°C to +125°C and is specified in the Reset Timeout Delay table under "Standard Versions" - distinct from longer timeouts (e.g., D2 = 20ms, D3 = 140ms) offered in other MAX6385 variants.
Is the MAX6385XS32D1-T qualified for automotive applications?
No, the MAX6385XS32D1-T is not automotive-qualified. Its ordering code lacks the "/V" suffix required for AEC-Q100 qualification (e.g., MAX6385XS32D1/V+T). The standard MAX6385XS32D1-T carries only the "+T" RoHS indicator and is rated for –40°C to +125°C operation, but does not undergo automotive-specific stress testing or qualification per AEC-Q100 Rev G.
MAX6385XS32D1-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:
- 3.2V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS32D1-T FAQ
1.How can I place an order for MAX6385XS32D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS32D1-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 MAX6385XS32D1-T reliable?
The price and inventory of MAX6385XS32D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS32D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS32D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS32D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS32D1-T?
MAX6385XS32D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS32D1-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 MAX6385XS32D1-T?
For technical support, including MAX6385XS32D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS32D1-T requirements.
6.How does Aetrix verify that MAX6385XS32D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS32D1-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 MAX6385XS32D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS32D1-T?
All MAX6385XS32D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS32D1-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 MAX6385XS32D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS32D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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