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Analog Devices Inc./Maxim Integrated MAX6385XS33D4-T
- Part No.:
- MAX6385XS33D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS33D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,402
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Product details
Overview
MAX6385XS33D4-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 3.3V reset threshold (±2.5% over –40°C to +125°C), 1120ms VCC reset timeout, and debounced manual reset input. It monitors single-supply rails in battery-powered microcontroller systems, ensuring reliable power-on reset and brownout protection down to VCC = 1V.
For engineers reviewing the MAX6385XS33D4-T datasheet, MAX6385XS33D4-T pinout, MAX6385XS33D4-T application, or MAX6385XS33D4-T equivalent, key selection criteria include reset threshold accuracy, manual reset timing (140ms min), SC70-4 package footprint, push-pull active-high output drive capability, and automotive-grade AEC-Q100 qualification status.
Technical Context
The MAX6385XS33D4-T implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for deterministic reset assertion. Its MR input features a 63kΩ internal pullup and guarantees reset assertion for ≥1µs MR pulses, with glitch rejection up to 100ns.
Reset output state remains valid across full VCC range (1.0V–5.5V); VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.5V) and VOH ≥ 0.8×VCC at ISOURCE = 500µA (VCC ≥ 2.5V), enabling direct interface with 1.8V/2.5V/3.3V logic families without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V nominal, ±2.5% over –40°C to +125°C - ensures stable reset activation across industrial temperature range |
| VCC Reset Timeout | 1120ms minimum - guarantees sufficient hold time for microcontroller initialization sequences |
| Manual Reset Timeout | 140ms minimum - provides short, controlled reset pulse for user-triggered recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP RESET pin |
| Operating Voltage | 1.0V to 5.5V - maintains valid reset output even during deep brownout conditions |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6385XS33D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.9mm with gull-wing leads. Thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1μF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - drives high during fault; sinks current when asserted low during power-up/brownout |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC via 63kΩ resistor; requires <0.3×VCC to assert reset |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.3V threshold | Eliminates external resistor divider and calibration effort for standard 3.3V I/O rail monitoring |
| 1120ms VCC reset timeout | Meets JEDEC JESD78 requirement for microcontroller power-up stabilization time |
| Debounced MR input | Rejects mechanical switch bounce and EMI transients without external RC network |
| Valid output down to VCC = 1V | Ensures deterministic reset behavior during ultra-low-voltage brownout recovery |
| AEC-Q100 qualified | Validated for automotive applications including infotainment power management and ADAS sensor modules |
Applications
| Industrial PLC Controller | Medical Wearable Sensor Hub |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers with dual 24V/5V supplies. IC Role / Device Role / Timing Role: Primary VCC supervisor for main 5V logic rail; asserts active-high RESET to ARM Cortex-M7 core during undervoltage events. Use Value: 1120ms timeout prevents spurious resets during transient line dips; ±2.5% threshold tolerance ensures consistent trip point across extended temperature range. | Use Scenario: Battery-backed health monitor with BLE radio, ECG front-end, and flash memory. IC Role / Device Role / Timing Role: Single-supply supervisor for 3.3V system rail; coordinates cold-start sequence and manual reset via tactile button. Use Value: 3μA quiescent current extends coin-cell life beyond 5 years; 140ms MR timeout enables rapid user-initiated firmware reload without disrupting sensor sampling. |
| Automotive Body Control Module | Smart Home Gateway |
Use Scenario: Power integrity monitoring in 12V-to-3.3V converted subsystem controlling door locks, lighting, and HVAC. IC Role / Device Role / Timing Role: AEC-Q100 qualified reset generator interfacing directly with Infineon AURIX TC3xx microcontroller RESET pin. Use Value: Guaranteed operation from –40°C to +125°C and negative-going transient immunity prevent false resets during load-dump events. | Use Scenario: Multi-rail IoT gateway with Wi-Fi SoC, Zigbee coprocessor, and USB host controller. IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3V I/O domain; synchronizes reset assertion across heterogeneous peripherals during AC power loss. Use Value: Push-pull active-high output eliminates pullup resistor, reducing BOM count and PCB area in cost-sensitive consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR33D4-T | Same 3.3V threshold and 1120ms timeout, but active-low push-pull output and no MR input | Suitable only where host μP accepts active-low reset and manual reset is unnecessary | Select when redesigning legacy systems using MAX6326 footprint and requiring identical timing |
| TPS3808G33DBVR | 3.3V threshold, 1200ms timeout, active-high push-pull, but higher 8μA ICC at 1.8V and no AEC-Q100 rating | Applicable in commercial-grade embedded systems where automotive qualification is not required | Choose for cost-sensitive non-automotive designs needing TI's production support and longer lead-time availability |
Compared with MAX6385XS33D4-T, MAX6326XR33D4-T lacks manual reset and inverts logic polarity, requiring schematic changes; TPS3808G33DBVR offers comparable functionality but trades off automotive qualification and ultra-low power for broader distributor stock and TI ecosystem integration.
Availability
MAX6385XS33D4-T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical wearable sensor hubs, automotive body control modules, and smart home gateways requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS33D4-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 power management, sensing, and connectivity applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervisors optimized for battery-operated, automotive, and industrial microcontroller systems demanding high accuracy and small footprint.
FAQ
What is the exact reset threshold voltage of MAX6385XS33D4-T and how tightly is it specified?
The MAX6385XS33D4-T has a nominal reset threshold of 3.30V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This means the actual threshold falls between 3.22V and 3.38V at any temperature within spec, ensuring robust immunity to supply ripple and thermal drift in mission-critical applications.
Does MAX6385XS33D4-T require an external pullup resistor on its RESET pin?
No, MAX6385XS33D4-T does not require an external pullup resistor because it features an active-high push-pull output stage. The internal driver actively sources current when RESET is asserted high and sinks current when deasserted low, enabling direct connection to microcontroller reset inputs without additional components.
What is the function and electrical behavior of the MR pin on MAX6385XS33D4-T?
The MR pin on MAX6385XS33D4-T is an active-low manual reset input with an internal 63kΩ pullup resistor to VCC. Driving MR below 0.3×VCC asserts RESET for the full 140ms manual reset timeout period. The pin rejects glitches ≤100ns and accepts TTL/CMOS logic levels, supporting momentary switch or FPGA-driven reset initiation without external debounce circuitry.
Can MAX6385XS33D4-T operate reliably during deep brownout conditions?
Yes, MAX6385XS33D4-T guarantees valid reset output behavior down to VCC = 1.0V. Its internal circuitry remains functional and correctly asserts or deasserts the active-high RESET signal across the entire 1.0V–5.5V supply range, making it suitable for applications experiencing severe undervoltage events such as battery depletion or unregulated input collapse.
Is MAX6385XS33D4-T qualified for automotive applications and what does that entail?
Yes, MAX6385XS33D4-T carries the /V suffix and is AEC-Q100 qualified for automotive use. This certification confirms rigorous testing for temperature cycling, humidity bias, mechanical shock, and ESD robustness per Grade 2 requirements (–40°C to +105°C ambient, or –40°C to +125°C junction), validating its suitability for under-hood and cabin electronics in modern vehicles.
MAX6385XS33D4-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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS33D4-T FAQ
1.How can I place an order for MAX6385XS33D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS33D4-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 MAX6385XS33D4-T reliable?
The price and inventory of MAX6385XS33D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS33D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS33D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS33D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS33D4-T?
MAX6385XS33D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS33D4-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 MAX6385XS33D4-T?
For technical support, including MAX6385XS33D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS33D4-T requirements.
6.How does Aetrix verify that MAX6385XS33D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS33D4-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 MAX6385XS33D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS33D4-T?
All MAX6385XS33D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS33D4-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 MAX6385XS33D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS33D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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