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Analog Devices Inc./Maxim Integrated MAX6385XS29D5-T
- Part No.:
- MAX6385XS29D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS29D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,017
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Product details
Overview
MAX6385XS29D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), 280ms minimum VCC reset timeout, and integrated debounced manual reset input. It monitors single supply voltage in battery-powered controllers and portable instrumentation where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS29D5-T datasheet, MAX6385XS29D5-T pinout, MAX6385XS29D5-T application, or MAX6385XS29D5-T equivalent, key selection criteria include its 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with systems requiring precise 2.93V supply monitoring and fast 280ms recovery timing.
Technical Context
The MAX6385XS29D5-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C, coupled to a temperature-stable monostable timer for fixed 280ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup resistor enables direct connection of a momentary switch to GND without external components.
This device operates within 1.0V to 5.5V VCC range and guarantees correct RESET logic state down to VCC = 1V. It features negative-going VCC transient immunity up to 35µs at 100mV overdrive and supports manual reset initiation with 200ns MR-to-RESET delay and 1µs minimum MR pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal, ±2.5% over -40°C to +125°C - ensures accurate detection of 2.9V–3.0V supply rails in industrial environments |
| VCC Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout Period | 280ms minimum - provides sufficient hold time for slow-starting microcontrollers and flash memory initialization |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout conditions down to 1V |
| MR Input Pullup Resistance | 63kΩ - allows direct use of mechanical switches without external biasing |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistors and drives CMOS/TTL loads directly |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6385XS29D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.95mm with gull-wing leads. This compact surface-mount package supports high-density PCB layouts in handheld and wearable electronics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition and deasserts low upon timeout completion; sinks/source up to 3.2mA/800µA |
| 3 | MR | Active-low manual reset input - forces reset when pulled below 0.3×VCC; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers - must be connected to system common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates need for external calibration in automotive and industrial applications |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring systems without compromising reset reliability |
| Debounced manual reset input | Integrated 63kΩ pullup and 100ns glitch rejection - enables robust front-panel reset functionality using simple SPST switches |
| Valid reset down to VCC = 1V | Guaranteed logic-level output integrity during deep undervoltage - prevents spurious MCU wake-up during power collapse |
| Negative-going VCC transient immunity | Withstands 35µs transients at 100mV overdrive - suppresses false resets caused by switching noise on shared power rails |
Applications
| Battery-Powered Portable Instruments | Industrial Controller Power Monitoring |
|---|---|
|
Use Scenario: Handheld multimeters and data loggers powered by single Li-ion or alkaline cells requiring stable reset during battery discharge from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Monitors main supply rail and asserts active-high RESET to hold MCU in reset until voltage stabilizes above 2.93V after power-on or brownout. Use Value: Prevents corrupted EEPROM writes and invalid ADC conversions during marginal supply conditions using only 3μA quiescent current. |
Use Scenario: PLC I/O modules operating in harsh factory environments with fluctuating 3.3V distributed supplies. IC Role / Device Role / Timing Role: Provides deterministic 280ms reset hold time after VCC recovery, ensuring FPGA configuration completes before peripheral initialization begins. Use Value: Eliminates boot failures caused by premature release of reset signal during noisy 3.3V rail stabilization. |
| Medical Wearable Sensors | Automotive Body Control Modules |
|
Use Scenario: ECG patch devices powered by CR2032 coin cells with tight space constraints and multi-year battery life targets. IC Role / Device Role / Timing Role: Generates clean active-high reset pulse synchronized to VCC ramp, with manual reset capability for field firmware updates via tactile button. Use Value: Enables reliable cold-start operation down to 1.8V supply while occupying only 2.56mm² PCB area in 4-pin SC70 package. |
Use Scenario: Door module ECUs exposed to load-dump and cold-crank conditions where supply dips below 3.0V during engine start. IC Role / Device Role / Timing Role: Detects VCC drop below 2.93V and holds MCU in reset for 280ms after recovery, preventing erratic CAN bus communication during voltage transients. Use Value: Meets AEC-Q100 requirements for reset timing stability across -40°C to +125°C ambient without external timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT29D5-T | Same electrical specs but in 6-pin μDFN (L611+1) package - larger footprint, better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for high-reliability industrial designs requiring enhanced thermal margin and board-level reworkability | Select when PCB layout allows 2.0mm × 2.0mm package and thermal dissipation >167mW is required |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms timeout, 2.5μA ICC at 3.3V - different threshold and timing; no MR input | Suitable for fixed 3.3V systems without manual reset requirement; lacks debounced MR pin | Choose only if exact 3.3V threshold and absence of manual reset are acceptable design constraints |
Compared with MAX6385XS29D5-T, the LT version offers superior thermal characteristics in a larger package, while the TPS3808G33DBVR provides lower current draw at higher voltages but sacrifices threshold flexibility and manual reset capability - making MAX6385XS29D5-T optimal for space-constrained 2.9V–3.0V systems needing field-serviceable reset control.
Availability
MAX6385XS29D5-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller power monitoring, and automotive body electronics requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS29D5-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 demanding industrial, automotive, and computing applications, with expertise in low-power supervision and power management.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems operating under wide voltage and temperature ranges - specifically engineered for reliability in portable, automotive, and industrial edge devices.
FAQ
What is the exact reset threshold voltage of MAX6385XS29D5-T and how stable is it over temperature?
The MAX6385XS29D5-T has a factory-set nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This corresponds to a worst-case threshold window of 2.85V to 3.00V at temperature extremes, ensuring robust detection of supply drops in automotive and industrial environments where MAX6385XS29D5-T is commonly deployed.
Does MAX6385XS29D5-T support manual reset, and what are the interface requirements?
Yes, MAX6385XS29D5-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, drive MR below 0.3×VCC (e.g., <0.9V at 3.0V VCC); the device guarantees reset assertion for 280ms after MR is released. A simple SPST switch from MR to GND suffices - no external components are needed, making MAX6385XS29D5-T ideal for field-serviceable designs.
What package type and dimensions does MAX6385XS29D5-T use, and is it RoHS-compliant?
MAX6385XS29D5-T uses a 4-pin SC70 package (outline 21-0098) measuring 1.6mm × 1.6mm × 0.95mm with gull-wing leads. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact footprint enables high-density placement in portable electronics where MAX6385XS29D5-T provides critical power-supply supervision without consuming valuable PCB real estate.
How does MAX6385XS29D5-T behave when VCC drops below 1.0V, and what is its minimum operating voltage?
MAX6385XS29D5-T guarantees correct RESET output logic state down to VCC = 1.0V, meaning the active-high reset signal remains valid and predictable even during severe brownout conditions. Below 1.0V, operation is not specified - however, the device's ability to function reliably at 1.0V ensures MAX6385XS29D5-T maintains system integrity longer than many competing supervisors during power collapse scenarios.
Is MAX6385XS29D5-T pin-compatible with older Maxim reset ICs like MAX809 or MAX6326?
Yes, MAX6385XS29D5-T is explicitly pin-compatible with MAX809, MAX810, MAX803, MAX6326, MAX6327, MAX6328, MAX6346, MAX6347, MAX6348, and MAX6711–MAX6713 families in the same 4-pin SC70 package. This allows direct replacement in existing designs without PCB modifications, preserving layout investment while upgrading to MAX6385XS29D5-T's improved accuracy, lower current, and enhanced transient immunity.
MAX6385XS29D5-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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS29D5-T FAQ
1.How can I place an order for MAX6385XS29D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS29D5-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 MAX6385XS29D5-T reliable?
The price and inventory of MAX6385XS29D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS29D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS29D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS29D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS29D5-T?
MAX6385XS29D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS29D5-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 MAX6385XS29D5-T?
For technical support, including MAX6385XS29D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS29D5-T requirements.
6.How does Aetrix verify that MAX6385XS29D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS29D5-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 MAX6385XS29D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS29D5-T?
All MAX6385XS29D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS29D5-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 MAX6385XS29D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS29D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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