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Analog Devices Inc./Maxim Integrated MAX6385XS32D4-T
- Part No.:
- MAX6385XS32D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS32D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,512
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Product details
Overview
MAX6385XS32D4-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.20V ±2.5% reset threshold, and 1120ms minimum VCC reset timeout. It monitors single supply voltage (1.0V–5.5V), consumes only 3μA at 1.8V, and guarantees valid reset state down to VCC = 1V. Used in battery-powered controllers and portable instrumentation for reliable power-up/brownout protection.
For engineers reviewing the MAX6385XS32D4-T datasheet, MAX6385XS32D4-T pinout, MAX6385XS32D4-T application, or MAX6385XS32D4-T equivalent, key selection factors include its 4-pin SC70 package, manual reset input with internal pullup, ±2.5% threshold accuracy over –40°C to +125°C, and immunity to negative-going VCC transients up to 100µs at 100mV overdrive.
Technical Context
The MAX6385XS32D4-T implements a precision bandgap-based reset comparator with 60ppm/°C tempco and guaranteed operation from VCC = 1.0V. Its internal timer generates a fixed 1120ms reset assertion period after VCC rises above 3.20V, independent of temperature or supply variation.
It features a debounced manual reset input (MR) with 63kΩ internal pullup, supporting TTL/CMOS-compatible logic levels and requiring no external debounce circuitry. The active-high push-pull RESET output drives high during reset assertion and guarantees VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2.5% (–40°C to +125°C); ensures reliable detection of brownout at nominal 3.3V rail |
| VCC Reset Timeout | 1120ms min; holds μP in reset long enough for stable clock and supply settling |
| Supply Current | 3μA at VCC = 1.8V; enables multi-year battery life in always-on portable systems |
| Operating Voltage | 1.0V to 5.5V; supports valid reset assertion even during deep brownout recovery |
| Reset Output Type | Active-high push-pull; eliminates need for external pullup resistor on RESET line |
| Manual Reset Input | MR with 63kΩ internal pullup; allows momentary switch-to-GND implementation without external components |
| Temp Range | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
Pinout & Package
MAX6385XS32D4-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, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers device and serves as reset threshold reference |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low when VCC > 3.20V + timeout |
| 3 | MR | Active-low manual reset input; forces reset when pulled low; internal 63kΩ pullup to VCC enables NC default |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.20V with ±2.5% tolerance over full temperature range eliminates external resistor network |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1.0V - critical for low-voltage brownout recovery |
| Negative transient immunity | Rejects VCC glitches ≤100µs wide at 100mV overdrive, preventing spurious resets in noisy power environments |
| Low quiescent current | 3μA at 1.8V enables integration into energy-harvesting and coin-cell-powered systems |
| Integrated MR pullup | 63kΩ internal resistor allows direct connection of momentary switch to GND - no BOM addition required |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor operating from CR2032 battery with 2.8V–3.3V discharge profile. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and asserts active-high RESET to ARM Cortex-M0+ MCU during brownout. Use Value: 3.20V threshold aligns precisely with end-of-life battery voltage; 1120ms timeout ensures ADC and BLE radio initialize fully before firmware execution. | Use Scenario: DIN-rail mounted analog input module exposed to 40°C–85°C ambient and 12V/24V field power fluctuations. IC Role / Device Role / Timing Role: Monitors isolated 3.3V logic supply and provides fail-safe reset to FPGA configuration controller. Use Value: ±2.5% threshold accuracy over temperature prevents false resets during thermal cycling; 125°C rating supports extended industrial lifetime. |
| Battery-Powered IoT Gateways | Automotive Body Control Units |
Use Scenario: LoRaWAN gateway powered by Li-SOCl₂ battery with intermittent 3.3V boost converter output. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during cold-start and triggers hardware reset of ESP32 host MCU. Use Value: Active-high push-pull output interfaces directly with ESP32's active-high reset pin; MR input enables remote firmware-triggered reset via GPIO. | Use Scenario: Under-dash BCM monitoring 3.3V microcontroller supply alongside 5V CAN transceiver rail. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant reset supervision for ASIL-B functional safety path. Use Value: Valid operation to 125°C and 3μA supply current reduce thermal load in sealed enclosures; RoHS-compliant SC70 package meets automotive material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS32D3-T | Same 3.20V threshold and active-high push-pull output, but 140ms VCC reset timeout instead of 1120ms | Suitable for fast-boot MCUs where shorter reset hold time is acceptable | Select when system clock and power rails stabilize within 140ms; not drop-in for 1120ms timing-critical designs |
| TPS3808G32DBVR | 3.2V threshold, active-high open-drain output, 1200ms timeout, 2.5μA typical ICC at 3.3V | Requires external pullup resistor; lacks integrated MR input | Choose for TI ecosystem compatibility or where open-drain flexibility is needed; MR functionality must be added externally |
Compared with MAX6385XS32D3-T and TPS3808G32DBVR, the MAX6385XS32D4-T uniquely combines 1120ms reset hold time, integrated MR with pullup, and push-pull output in a 4-pin SC70 - enabling minimal footprint and zero-external-component reset supervision for slow-starting power architectures.
Availability
MAX6385XS32D4-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, battery-powered IoT gateways, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS32D4-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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems where supply stability, timing predictability, and small footprint are critical design constraints.
FAQ
What is the exact reset threshold voltage of the MAX6385XS32D4-T and how accurate is it over temperature?
The MAX6385XS32D4-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 specification is guaranteed by design and ensures reliable detection of brownout conditions on 3.3V systems across harsh environmental conditions without requiring calibration or trimming.
Does the MAX6385XS32D4-T support manual reset, and what is the internal pullup value on the MR pin?
Yes, the MAX6385XS32D4-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. This allows direct connection of a momentary switch between MR and GND without external components, and the input accepts standard TTL/CMOS logic levels. The MR signal forces reset while low and maintains reset for the full 1120ms timeout after release.
What package type and dimensions does the MAX6385XS32D4-T use, and is it RoHS-compliant?
The MAX6385XS32D4-T uses a 4-pin SC70 package (outline 21-0098) measuring 2.0mm × 2.1mm × 0.95mm, with land pattern 90-0187. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact, surface-mount package supports high-density PCB layouts in space-constrained portable and automotive applications.
Can the MAX6385XS32D4-T operate reliably at very low supply voltages, and down to what VCC level is the reset output guaranteed?
Yes, the MAX6385XS32D4-T operates over a 1.0V to 5.5V supply range and guarantees correct RESET output logic state down to VCC = 1.0V. This ensures fail-safe reset assertion during deep brownout recovery - a critical capability for battery-powered systems where supply voltage may sag below typical logic thresholds before recovering.
How does the MAX6385XS32D4-T handle short-duration power supply transients, and what is its immunity specification?
The MAX6385XS32D4-T provides immunity to negative-going VCC transients: it will not assert reset for glitches ≤100µs wide when the overdrive (VTH – VCC) is 100mV. This behavior is characterized in the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph in the datasheet and enables robust operation in electrically noisy environments such as motor drives or switching power supplies.
MAX6385XS32D4-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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS32D4-T FAQ
1.How can I place an order for MAX6385XS32D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS32D4-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 MAX6385XS32D4-T reliable?
The price and inventory of MAX6385XS32D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS32D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS32D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS32D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS32D4-T?
MAX6385XS32D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS32D4-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 MAX6385XS32D4-T?
For technical support, including MAX6385XS32D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS32D4-T requirements.
6.How does Aetrix verify that MAX6385XS32D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS32D4-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 MAX6385XS32D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS32D4-T?
All MAX6385XS32D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS32D4-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 MAX6385XS32D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS32D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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