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Analog Devices Inc./Maxim Integrated MAX6385XS28D4-T
- Part No.:
- MAX6385XS28D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS28D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
MAX6385XS28D4-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.80V reset threshold, 1120ms VCC reset timeout, and manual reset input. It monitors single-supply voltages from +1.8V to +5.0V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in battery-powered controllers and portable instrumentation requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS28D4-T datasheet, MAX6385XS28D4-T pinout, MAX6385XS28D4-T application, or MAX6385XS28D4-T equivalent, key selection criteria include its active-high push-pull output configuration, precise ±2.5% reset threshold accuracy over –40°C to +125°C, integrated MR pullup resistor (63kΩ), and 4-pin SC70 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6385XS28D4-T implements a precision bandgap-based voltage comparator with internal 2.80V reference and a monolithic timer for fixed 1120ms reset assertion after VCC recovery. Its MR input features built-in debouncing logic and an internal 63kΩ pullup resistor, eliminating external components for manual reset functionality.
It operates across full industrial temperature range (–40°C to +125°C) and supports stable reset assertion during negative-going VCC transients up to 35µs at 100mV overdrive, enabling robust operation in electrically noisy environments without additional filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±2.5% (factory-trimmed; ensures accurate brownout detection at core supply level) |
| VCC Reset Timeout | 1120ms min (guarantees μP remains held in reset long enough for stable power rail settling) |
| MR Timeout | 140ms min (ensures clean system reset after manual button release, independent of VCC timing) |
| Supply Current | 3μA at +1.8V (enables multi-year battery life in always-on portable monitoring systems) |
| Operating Voltage Range | +1.0V to +5.5V (supports valid reset assertion even during deep brownout or low-VCC startup) |
| Output Type | Active-high push-pull (drives high during reset; eliminates need for external pullup resistor) |
| Temp Range | –40°C to +125°C (qualified for automotive under-hood and industrial control applications) |
Pinout & Package
MAX6385XS28D4-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 high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source; powers internal circuitry and feeds reset comparator |
| 2 | RESET | Active-high push-pull output; drives high during reset condition; sinks current when deasserted |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for stable threshold accuracy |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; accepts TTL/CMOS logic levels |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Debounced manual reset input | Integrated MR logic rejects <100ns glitches and requires no external RC filter - reduces BOM count and layout area |
| Low-power operation | 3μA supply current at 1.8V - extends battery life in portable medical sensors and IoT edge nodes |
| VCC-monitored reset assertion | Guaranteed valid RESET state down to VCC = 1V - ensures deterministic behavior during deep undervoltage conditions |
| Negative transient immunity | Withstands VCC glitches up to 35µs duration at 100mV overdrive - improves reliability in motor-drive or switching-power-supply environments |
Applications
| Battery-Powered Instrumentation | Industrial Controller Monitoring |
|---|---|
Use Scenario: Portable handheld multimeter with Li-ion battery and low-power MCU. IC Role / Device Role / Timing Role: Supervises main 3.3V supply rail and asserts active-high RESET until voltage stabilizes post-power-on or during battery sag. Use Value: Prevents MCU code execution errors during brownout; 3μA quiescent current enables >5-year shelf life with coin-cell backup. | Use Scenario: PLC I/O module operating in factory ambient with fluctuating 24V DC input. IC Role / Device Role / Timing Role: Monitors regulated 3.3V logic supply and provides 1120ms reset hold time after power recovery. Use Value: Ensures FPGA configuration completes before peripheral initialization; ±2.5% threshold accuracy prevents false resets across –40°C to +125°C. |
| Automotive Body Control Module | Medical Sensor Node |
Use Scenario: Door module with CAN interface and 5V/3.3V dual-rail power. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant reset supervision for microcontroller using 2.80V threshold aligned to 3.3V LDO dropout margin. Use Value: Matches OEM brownout specification; 4-pin SC70 footprint minimizes PCB area in tight connectorized assemblies. | Use Scenario: Wireless ECG patch with ultra-low-power ARM Cortex-M0+ and coin-cell battery. IC Role / Device Role / Timing Role: Generates clean active-high reset pulse on power-up and manual button press (MR pin). Use Value: 140ms MR timeout ensures reliable user-initiated reset without spurious triggers; 1.0V minimum VCC operation supports graceful shutdown at end-of-battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS28D3-T | 140ms VCC reset timeout (vs. 1120ms); same threshold, MR, and package | Suitable for fast-booting systems where shorter reset hold time is acceptable | Select when system clock and peripherals stabilize within 140ms; verify timing margins with worst-case power ramp rate. |
| TLV809K28DBZR | 2.80V threshold, 140ms timeout, SOT-23-3 package; no MR input; ±1.5% accuracy | Lacks manual reset capability and has smaller temp range (–40°C to +125°C same, but no AEC-Q100 qualification) | Choose for cost-sensitive consumer applications without MR requirement; not suitable for automotive or industrial manual-reset use cases. |
Compared with MAX6385XS28D4-T, MAX6385XS28D3-T offers faster reset release but sacrifices robustness against slow-ramping supplies, while TLV809K28DBZR reduces footprint and cost but removes critical MR functionality and automotive qualification - making MAX6385XS28D4-T the only option meeting full industrial reset timing, manual control, and AEC-Q100 requirements.
Availability
MAX6385XS28D4-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller monitoring, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6385XS28D4-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 demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for reliable reset generation in space- and power-constrained embedded systems with strict brownout immunity requirements.
FAQ
What is the exact reset threshold voltage of MAX6385XS28D4-T?
The MAX6385XS28D4-T has a factory-set reset threshold of 2.80V, with guaranteed accuracy of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The '28' suffix in the part number explicitly denotes the 2.80V threshold per Maxim's ordering guide.
Does MAX6385XS28D4-T support manual reset functionality?
Yes, MAX6385XS28D4-T includes a dedicated active-low manual reset input (MR pin) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for 140ms after MR is released. This feature enables pushbutton-initiated system resets without external components.
What is the reset timeout period for MAX6385XS28D4-T, and how is it configured?
MAX6385XS28D4-T provides a fixed 1120ms minimum reset timeout period after VCC rises above the 2.80V threshold. This timing is factory-programmed and non-adjustable; the 'D4' suffix in the part number specifies the 1120ms delay per Maxim's reset timeout table. No external capacitor or resistor is needed.
What package type and footprint does MAX6385XS28D4-T use?
MAX6385XS28D4-T is supplied in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. It is RoHS-compliant ('+' suffix) and compatible with standard reflow soldering profiles, including peak temperature up to +260°C.
Is MAX6385XS28D4-T qualified for automotive applications?
No, MAX6385XS28D4-T is not AEC-Q100 qualified. While it operates across –40°C to +125°C, only variants with '/V' in the part number (e.g., MAX6385XS28D4/V+T) carry AEC-Q100 qualification. The '-T' suffix indicates tape-and-reel packaging but does not imply automotive grade.
MAX6385XS28D4-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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS28D4-T FAQ
1.How can I place an order for MAX6385XS28D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS28D4-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 MAX6385XS28D4-T reliable?
The price and inventory of MAX6385XS28D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS28D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS28D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS28D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS28D4-T?
MAX6385XS28D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS28D4-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 MAX6385XS28D4-T?
For technical support, including MAX6385XS28D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS28D4-T requirements.
6.How does Aetrix verify that MAX6385XS28D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS28D4-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 MAX6385XS28D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS28D4-T?
All MAX6385XS28D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS28D4-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 MAX6385XS28D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS28D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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