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Analog Devices Inc./Maxim Integrated MAX6385XS28D3-T
- Part No.:
- MAX6385XS28D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS28D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
MAX6385XS28D3-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.80V reset threshold, 140ms minimum VCC reset timeout, and manual reset input (MR). It monitors single supply voltage (1.0V–5.5V), consumes only 3μA at 1.8V, guarantees valid reset output down to VCC = 1V, and operates across –40°C to +125°C for use in battery-powered industrial controllers.
For engineers reviewing the MAX6385XS28D3-T datasheet, MAX6385XS28D3-T pinout, MAX6385XS28D3-T application, or MAX6385XS28D3-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), MR debounce capability, SC70-4 package footprint, and compatibility with low-voltage μP power-up sequencing in space-constrained embedded systems.
Technical Context
The MAX6385XS28D3-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance over –40°C to +125°C and 60ppm/°C tempco. Its internal timer enforces a guaranteed minimum 140ms reset assertion after VCC rises above 2.80V.
It features an internally pulled-up manual reset input (MR) with 63kΩ pullup resistance, supporting TTL/CMOS logic drive and requiring no external debounce. The active-high push-pull RESET output drives high during fault conditions and remains asserted for the full timeout period after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V (factory-set, ±2.5% over –40°C to +125°C) |
| VCC Operating Range | 1.0V to 5.5V - supports brownout detection down to ultra-low supply voltages |
| Reset Timeout | 140ms min - ensures reliable μP initialization after power recovery |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered devices |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor |
| MR Input | Debounced manual reset with 63kΩ internal pullup - simplifies board-level reset button design |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6385XS28D3-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, optimized for high-density PCB layouts.
| 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 reset assertion; sinks 80μA at VCC ≥ 1.0V |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup to VCC; requires <1µs pulse width for reliable assertion |
| 4 | GND | Analog/digital ground reference - must be connected to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±2.5% accuracy over full temperature range - eliminates external resistor divider calibration |
| Guaranteed reset validity | RESET output state valid down to VCC = 1.0V - ensures deterministic behavior during deep brownout |
| Integrated MR pullup | 63kΩ internal pullup on MR pin - reduces BOM count and PCB area vs. discrete resistor solution |
| Negative transient immunity | Rejects VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Low-power operation | 3μA ICC at 1.8V - extends battery life in portable instrumentation and sensor nodes |
Applications
| Industrial PLC I/O Module | Battery-Powered Data Logger |
|---|---|
Use Scenario: Monitors 3.3V I/O supply in programmable logic controller modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M7 processor during undervoltage events. Use Value: 140ms timeout ensures firmware reload completes before peripheral initialization begins; ±2.5% threshold stability prevents false trips at –40°C. | Use Scenario: Powers cycle management in environmental monitoring node using CR2032 coin cell and low-dropout regulator. IC Role / Device Role / Timing Role: Resets MSP430 microcontroller when regulated 1.8V core supply drops below 2.80V due to battery depletion. Use Value: 3μA quiescent current extends operational lifetime beyond 5 years; MR pin enables field firmware update via tactile switch. |
| Automotive Body Control Unit | Medical Point-of-Care Sensor |
Use Scenario: Embedded in LIN bus gateway module operating from 5V vehicle battery with load-dump transients. IC Role / Device Role / Timing Role: Provides fail-safe reset to Infineon AURIX TC275 during cold-crank (4.5V dip) and hot-soak conditions. Use Value: –40°C to +125°C rating and 35µs glitch rejection prevent reset misfires during engine start; SC70-4 footprint saves space on compact MCU carrier board. | Use Scenario: Ensures deterministic startup of ADuCM360 analog front-end in handheld blood glucose meter. IC Role / Device Role / Timing Role: Generates active-high reset pulse to initialize ADC and flash memory after 2.80V LDO output stabilizes. Use Value: Push-pull output eliminates external pullup, reducing leakage paths critical for Class II medical device leakage current compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR28D3+T | Same 2.80V threshold and 140ms timeout, but active-low open-drain output requiring external pullup | Lacks MR input; not suitable where manual reset functionality is required | Select when board already includes pullup resistor and MR is unused |
| TPS3808G33DBVR | 2.93V threshold (not 2.80V), 200ms timeout, 1.8V–6.0V VCC range, no MR input | Higher threshold tolerance (±0.5%) but no manual reset support; different SC70-5 pinout | Choose for tighter threshold accuracy where MR is unnecessary and timing margin allows 200ms |
Compared with MAX6326XR28D3+T and TPS3808G33DBVR, the MAX6385XS28D3-T uniquely combines 2.80V precision threshold, 140ms timeout, active-high push-pull output, and debounced MR in a 4-pin SC70 - enabling simpler, smaller, and more functionally complete reset solutions for space- and feature-constrained designs.
Availability
MAX6385XS28D3-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, automotive body control units, and medical point-of-care sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS28D3-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, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy μP supervisory circuits targeting battery-operated equipment, automotive ECUs, and industrial controllers needing guaranteed reset behavior under brownout and transient conditions.
FAQ
What is the exact reset threshold voltage of the MAX6385XS28D3-T?
The MAX6385XS28D3-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 fixed by laser trimming during manufacturing and does not require external components. The "28" suffix in MAX6385XS28D3-T explicitly denotes the 2.80V threshold per Maxim's ordering nomenclature.
Does the MAX6385XS28D3-T support manual reset functionality?
Yes, the MAX6385XS28D3-T includes a debounced manual reset input (MR) pin with an internal 63kΩ pullup resistor to VCC. Driving MR low asserts the active-high RESET output for the full 140ms timeout period after release. No external debounce circuitry is needed, and the MR pin accepts standard TTL/CMOS logic levels - making it ideal for integration with momentary switches or system-level reset signals.
What package type and dimensions does the MAX6385XS28D3-T use?
The MAX6385XS28D3-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its land pattern (90-0187) is optimized for reflow soldering on multilayer PCBs. This compact footprint provides pin compatibility with other members of the MAX6384–MAX6390 series in SC70-4 format.
How does the MAX6385XS28D3-T behave during low-VCC conditions?
The MAX6385XS28D3-T guarantees valid logic states on its RESET output down to VCC = 1.0V, ensuring deterministic reset assertion even during deep brownout. Below 1.0V, the device ceases operation, but the push-pull output remains in its last valid state until VCC drops further. This behavior prevents undefined processor states during power collapse - a critical requirement for fail-safe embedded systems.
Is the MAX6385XS28D3-T qualified for automotive applications?
No, the MAX6385XS28D3-T is not AEC-Q100 qualified. While it operates across –40°C to +125°C and meets industrial reliability standards, only specific variants denoted with "/V" in the part number (e.g., MAX6385XS28D3/V+T) carry AEC-Q100 qualification. For automotive under-hood or safety-critical applications, the /V version must be selected - the standard MAX6385XS28D3-T is intended for industrial and commercial use.
MAX6385XS28D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS28D3-T FAQ
1.How can I place an order for MAX6385XS28D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS28D3-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 MAX6385XS28D3-T reliable?
The price and inventory of MAX6385XS28D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS28D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS28D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS28D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS28D3-T?
MAX6385XS28D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS28D3-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 MAX6385XS28D3-T?
For technical support, including MAX6385XS28D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS28D3-T requirements.
6.How does Aetrix verify that MAX6385XS28D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS28D3-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 MAX6385XS28D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS28D3-T?
All MAX6385XS28D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS28D3-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 MAX6385XS28D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS28D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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