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Analog Devices Inc./Maxim Integrated MAX6385XS33D7-T
- Part No.:
- MAX6385XS33D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS33D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,328
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Product details
Overview
MAX6385XS33D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.30V reset threshold (±2.5% over -40°C to +125°C), and 1200ms minimum VCC reset timeout. It monitors single supply voltage in battery-powered or embedded systems and guarantees valid reset state down to VCC = 1V.
For engineers reviewing the MAX6385XS33D7-T datasheet, MAX6385XS33D7-T pinout, MAX6385XS33D7-T application, or MAX6385XS33D7-T equivalent, key selection criteria include reset threshold accuracy, manual reset input compatibility, SC70-4 package footprint, and guaranteed operation at 1.8V–5.5V supply range with ≤6µA current at 3.6V.
Technical Context
The MAX6385XS33D7-T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across temperature, paired with a monolithic timer for deterministic 1200ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup enables direct switch interfacing without external components.
This device operates as a standalone power-on reset supervisor with no external timing components required. The active-high push-pull RESET output drives directly into µP reset inputs, eliminating need for external pullup resistors while maintaining logic validity down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| VCC Operating Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V/5V systems |
| Reset Timeout | 1200ms minimum - provides sufficient hold time for slow-ramping power supplies and complex boot sequences |
| Supply Current | 6µA at +3.6V, 3µA at +1.8V - enables multi-year battery life in portable equipment |
| MR Input Pullup | 63kΩ internal resistor - allows direct connection of momentary switch to GND without external components |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup and ensures fast, rail-to-rail logic transitions |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6385XS33D7-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 | 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 fault condition and holds for full 1200ms timeout |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; drive low to initiate system reset |
| 4 | GND | Ground reference for all internal circuitry and reset comparator - requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.30V with ±2.5% accuracy over full temperature range - eliminates need for external resistor divider calibration |
| Guaranteed reset validity | Operates correctly down to VCC = 1V - ensures deterministic reset behavior during severe brownout conditions |
| Integrated MR pullup | 63kΩ internal resistor - enables direct switch interface without BOM additions or layout overhead |
| Negative-going transient immunity | Rejects VCC glitches <150µs wide at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Low quiescent current | 3µA at 1.8V - extends battery runtime in always-on IoT sensors and wearables |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery requiring reliable power-on initialization and brownout recovery. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M0+ MCU during power ramp-up and voltage sag. Use Value: 1200ms timeout ensures complete ADC calibration and BLE radio initialization before firmware execution begins. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using 3.3V supply derived from vehicle battery. IC Role / Device Role / Timing Role: Voltage supervisor monitoring 3.3V rail and providing manual reset via service port connector. Use Value: ±2.5% threshold accuracy prevents false resets during cold-cranking (battery dip to 6V) while ensuring detection at 3.2V brownout. |
| Industrial PLC I/O Cards | Smart Home Hub Power Management |
Use Scenario: DIN-rail mounted controller with isolated 24V-to-3.3V DC/DC converter powering FPGA and communication interfaces. IC Role / Device Role / Timing Role: Primary reset generator ensuring synchronized startup of FPGA configuration and Ethernet PHY. Use Value: Active-high push-pull output drives FPGA PROG_B pin directly, eliminating level-shifter and reducing component count. | Use Scenario: Wi-Fi/Zigbee hub powered from USB-C PD adapter with dynamic voltage scaling between 3.3V and 5V rails. IC Role / Device Role / Timing Role: Dual-role supervisor handling both power-up sequencing and user-initiated factory reset via button press. Use Value: Internal MR pullup enables single-pole switch implementation, reducing bill-of-materials and improving mechanical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 3.08V reset threshold, 240ms timeout, no MR input, SC70-3 package | Lacks manual reset capability and uses smaller 3-pin footprint | Select when board space is critical and manual reset is unnecessary |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout, adjustable delay via capacitor, SOT-23-5 package | Requires external timing capacitor; higher 12µA quiescent current | Select when programmable timeout is required and 6µA current is not mandatory |
Compared with MAX809TRD3-T and TPS3808G33DBVR, the MAX6385XS33D7-T offers longer 1200ms timeout for complex boot sequences, integrated MR functionality without external components, and lower 3µA current at 1.8V - making it optimal for battery-sensitive, manually resettable embedded systems.
Availability
MAX6385XS33D7-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O cards, and smart home hub power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6385XS33D7-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, communications, and consumer applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy voltage supervision for microprocessor-based systems where reliability under brownout and long-term battery operation are critical design requirements.
FAQ
What is the exact reset threshold voltage of MAX6385XS33D7-T and how tightly is it specified?
The MAX6385XS33D7-T has a factory-set nominal reset threshold of 3.30V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table on page 3 of the datasheet, where VTH min/max values are listed as 3.22V/3.38V at +25°C and 3.22V/3.38V over temperature. The "33" suffix in the part number explicitly denotes the 3.30V threshold variant.
Does MAX6385XS33D7-T support manual reset functionality, and what is required to implement it?
Yes, MAX6385XS33D7-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To implement manual reset, connect a normally open momentary switch between MR (pin 3) and GND. No external components are needed - the internal pullup ensures MR remains high when idle, and pulling it low initiates a full 1200ms reset pulse. This feature is confirmed in the Features list and Pin Description section of the datasheet.
What package type and footprint does MAX6385XS33D7-T use, and are land patterns available?
MAX6385XS33D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. The official land pattern and soldering guidelines are published by Maxim Integrated at maximintegrated.com/packages. This compact RoHS-compliant package is pin-compatible with other 4-pin SC70 supervisors in the MAX6384–MAX6390 series, enabling layout reuse across variants.
How does the reset timeout behavior differ between power-on and manual reset events for MAX6385XS33D7-T?
For MAX6385XS33D7-T, the reset timeout is fixed at 1200ms minimum for VCC-related events (power-up, brownout recovery), but the datasheet confirms this part does not support separate manual reset timeout - only the MAX6390 variant offers distinct MR timeout (140ms/150ms). Therefore, both VCC recovery and MR release trigger the same 1200ms active-high reset pulse, as verified in the Reset Timeout Delay table and Selector Guide on page 8.
Is MAX6385XS33D7-T qualified for automotive applications, and what is its AEC-Q100 status?
MAX6385XS33D7-T is not automotive-qualified; it carries the "+T" suffix indicating lead-free/RoHS compliance but lacks the "/V" automotive qualification marker. The datasheet states AEC-Q100 qualification applies only to specific /V trim versions (e.g., MAX6385XS33D7/V+T), which are explicitly listed in the Ordering Information table. For automotive use, designers must select the /V variant - the standard MAX6385XS33D7-T is rated for industrial temperature range (-40°C to +125°C) only.
MAX6385XS33D7-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:
- 3.3V
- 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
MAX6385XS33D7-T FAQ
1.How can I place an order for MAX6385XS33D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS33D7-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 MAX6385XS33D7-T reliable?
The price and inventory of MAX6385XS33D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS33D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS33D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS33D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS33D7-T?
MAX6385XS33D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS33D7-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 MAX6385XS33D7-T?
For technical support, including MAX6385XS33D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS33D7-T requirements.
6.How does Aetrix verify that MAX6385XS33D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS33D7-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 MAX6385XS33D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS33D7-T?
All MAX6385XS33D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS33D7-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 MAX6385XS33D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS33D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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