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Analog Devices Inc./Maxim Integrated MAX6385XS28D5-T
- Part No.:
- MAX6385XS28D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS28D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,247
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Product details
Overview
MAX6385XS28D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.80V reset threshold (±2.5% over –40°C to +125°C), 280ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered or embedded systems where reliable power-on reset and brownout protection are critical, such as portable instrumentation and industrial controllers.
For engineers reviewing the MAX6385XS28D5-T datasheet, MAX6385XS28D5-T pinout, MAX6385XS28D5-T application, or MAX6385XS28D5-T equivalent, key selection criteria include its 2.80V threshold accuracy, 280ms reset timeout, MR input compatibility with TTL/CMOS logic, guaranteed valid reset down to VCC = 1V, and 4-pin SC70 package footprint.
Technical Context
The MAX6385XS28D5-T implements a precision bandgap-based voltage comparator for VCC monitoring, paired with a monolithic timer that guarantees minimum 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 belongs to the MAX6384–MAX6390 family with 4-pin SC70 packaging, active-high push-pull RESET output, and no auxiliary RESET IN functionality - distinguishing it from MAX6387/MAX6388/MAX6389 variants and confirming its role as a single-supply, manual-reset-capable supervisor only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V (nominal), ±2.5% over –40°C to +125°C - ensures stable trip point across automotive and industrial temperature ranges |
| VCC Reset Timeout | 280ms (min) - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V |
| MR Input Logic | Active-low with 63kΩ internal pullup - eliminates need for external resistor; compatible with open-drain drivers and mechanical switches |
| RESET Output Type | Active-high push-pull - drives high directly without external pullup, simplifying interface to μP reset inputs requiring active-high assertion |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6385XS28D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), with 0.65mm pitch and thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source; must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low after timeout - directly interfaces μP reset pins requiring active-high signal |
| 3 | MR | Active-low manual reset input; internal 63kΩ pullup to VCC allows switch-to-GND implementation without external components |
| 4 | GND | Ground reference for all internal comparators and output driver - must connect to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±2.5% tolerance over full temperature range - eliminates need for external resistor divider calibration |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic μP state during deep brownout - prevents spurious execution before supply stabilizes |
| Debounced manual reset input | Internal filtering rejects <100ns glitches on MR - removes requirement for external RC debounce network |
| Negative-going VCC transient immunity | Withstands transients up to 35µs at 100mV overdrive - improves robustness in noisy power environments |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on sensor nodes |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor with cold-chain logging requiring reliable startup after storage at –20°C. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output and asserts active-high RESET to ARM Cortex-M0 until voltage stabilizes above 2.80V for ≥280ms. Use Value: Prevents firmware corruption during low-temperature power-up by guaranteeing reset hold time even at VCC = 1.8V and –40°C. | Use Scenario: DIN-rail mounted analog input module operating from 24VDC converted to 3.3V/1.8V rails in factory automation. IC Role / Device Role / Timing Role: Monitors 3.3V microcontroller supply and provides manual reset via front-panel button connected to MR pin. Use Value: Internal MR pullup and glitch rejection eliminate external debounce components, reducing BOM count and PCB area. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: Revenue-grade electricity meter with dual-supply architecture (3.3V MCU + 1.8V RTC) and tamper-detection circuitry. IC Role / Device Role / Timing Role: Resets main processor on 3.3V rail brownout while allowing independent RTC operation; MR enables field-service reset without power cycle. Use Value: 280ms timeout aligns with typical EEPROM write completion time, preventing data loss during power interruption. | Use Scenario: 12V-powered door module with LIN transceiver and wake-on-LIN capability requiring fail-safe reset during load-dump events. IC Role / Device Role / Timing Role: Supervises 3.3V domain powering microcontroller and asserts RESET during VCC dip below 2.80V caused by alternator switching noise. Use Value: Immunity to 35µs negative transients avoids false resets during engine cranking, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT28D5-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70 - larger footprint, lower θJA (477°C/W vs. 322.6°C/W) | Preferred for thermally constrained designs needing higher power dissipation margin | Select when board layout allows 2.0mm × 2.0mm µDFN and thermal performance outweighs size constraints |
| TPS3808G33DBVR | 2.93V threshold (not 2.80V), 200ms timeout (not 280ms), 1.8–6.0V operating range, SOT-23-5 package | Lacks MR input - requires external circuitry for manual reset functionality | Choose only if threshold/timing tolerances permit and MR is not required in the target design |
Compared with MAX6385LT28D5-T, the MAX6385XS28D5-T offers superior board-space efficiency in portable applications; versus TPS3808G33DBVR, it delivers integrated manual reset and tighter threshold accuracy - making it the preferred choice for space-limited, MR-dependent embedded systems.
Availability
MAX6385XS28D5-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply throughout product lifecycles.
Supply support for MAX6385XS28D5-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.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for battery longevity and deterministic reset behavior in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6385XS28D5-T and how does it vary with temperature?
The MAX6385XS28D5-T has a nominal reset threshold of 2.80V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This means the actual threshold remains between 2.73V and 2.87V across temperature extremes. The device achieves this stability using a precision bandgap reference and laser-trimmed resistors, eliminating need for external calibration.
Does MAX6385XS28D5-T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS28D5-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 input accepts TTL/CMOS logic levels and open-drain signals. No external components are needed - a normally open switch from MR to GND suffices for pushbutton reset functionality.
What is the minimum VCC voltage at which MAX6385XS28D5-T guarantees correct RESET output logic state?
MAX6385XS28D5-T guarantees valid RESET output state down to VCC = 1.0V. Below this, the internal circuitry may not maintain proper logic levels. This feature ensures deterministic microprocessor behavior during deep brownout conditions - for example, holding RESET high until VCC recovers above 2.80V and remains stable for ≥280ms, even if VCC dips to 1.2V momentarily.
Can MAX6385XS28D5-T be used in automotive applications, and what qualification does it carry?
MAX6385XS28D5-T is not automotive-qualified. While it operates from –40°C to +125°C, it lacks AEC-Q100 certification. For automotive use, select the /V variant (e.g., MAX6385XS28D5/V+T), which is explicitly qualified per AEC-Q100 Grade 1 and features enhanced process controls and test coverage. The standard MAX6385XS28D5-T is intended for industrial and commercial applications only.
What package type and footprint does MAX6385XS28D5-T use, and are there land pattern recommendations?
MAX6385XS28D5-T uses a 4-pin SC70 package (outline 21-0098, package code X4+1) with 1.6mm × 1.6mm body and 0.65mm lead pitch. Maxim recommends land pattern 90-0187 for optimal solder joint reliability. This compact footprint supports high-density layouts in portable electronics while maintaining manufacturability with standard reflow profiles.
MAX6385XS28D5-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:
- 2.8V
- 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
MAX6385XS28D5-T FAQ
1.How can I place an order for MAX6385XS28D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS28D5-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 MAX6385XS28D5-T reliable?
The price and inventory of MAX6385XS28D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS28D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS28D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS28D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS28D5-T?
MAX6385XS28D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS28D5-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 MAX6385XS28D5-T?
For technical support, including MAX6385XS28D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS28D5-T requirements.
6.How does Aetrix verify that MAX6385XS28D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS28D5-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 MAX6385XS28D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS28D5-T?
All MAX6385XS28D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS28D5-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 MAX6385XS28D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS28D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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