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Analog Devices Inc./Maxim Integrated MAX6385XS27D3-T
- Part No.:
- MAX6385XS27D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS27D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
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Product details
Overview
MAX6385XS27D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.70V reset threshold (±2.5% over –40°C to +125°C), 140ms minimum VCC reset timeout, and integrated debounced manual reset input (MR) with internal 63kΩ pullup. It monitors single supply voltage in battery-powered embedded controllers and portable instrumentation requiring guaranteed reset assertion down to VCC = 1V.
For engineers reviewing the MAX6385XS27D3-T datasheet, MAX6385XS27D3-T pinout, MAX6385XS27D3-T application, or MAX6385XS27D3-T equivalent, key selection criteria include reset threshold accuracy, MR timing behavior, push-pull output drive capability at low VCC, and SC70-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6385XS27D3-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance across –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms minimum reset timeout after VCC rises above 2.70V or after MR release.
It features a dedicated active-low manual reset input (MR) with 1µs minimum pulse width support, 100ns glitch rejection, and 200ns MR-to-reset delay. The push-pull RESET output guarantees valid logic levels (VOH ≥ 0.8×VCC, VOL ≤ 0.3V) for VCC ≥ 1.0V and sink/source currents up to 1.2mA (VCC ≥ 2.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.70V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 140ms minimum - provides sufficient hold time for microcontroller initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP reset inputs |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch interface without external components |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset signaling during deep brownout conditions down to 1V |
| Reset Output Validity | Guaranteed down to VCC = 1V - prevents spurious release during power ramp-down |
Pinout & Package
MAX6385XS27D3-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 portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source - must be decoupled with 0.1μF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives high during reset assertion; sinks current when deasserted |
| 3 | GND | Ground reference for all internal circuitry and reset comparator - requires low-impedance connection to system ground plane |
| 4 | MR | Active-low manual reset input - pulled internally to VCC via 63kΩ; driven low to force reset independent of VCC level |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.70V with ±2.5% accuracy over full temperature range - eliminates need for external calibration or trimming resistors |
| Debounced manual reset input | 100ns glitch rejection and 1µs minimum pulse width - enables robust switch interfacing without external RC filtering |
| Low-voltage reset validity | RESET output guaranteed functional down to VCC = 1.0V - ensures deterministic reset behavior during deep undervoltage events |
| Negative-going VCC transient immunity | Withstands transients up to 35µs duration at 100mV overdrive - reduces false resets in noisy power environments |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring applications such as smart meters and wearables |
Applications
| Battery-Powered Instrumentation | Industrial Microcontroller Supervision |
|---|---|
Use Scenario: Portable handheld multimeter with Li-ion battery supply experiencing gradual discharge and intermittent load spikes. IC Role / Device Role / Timing Role: Monitors core supply rail (2.7V) and asserts active-high RESET to halt MCU execution during brownout; MR enables user-initiated recalibration. Use Value: Prevents corrupted EEPROM writes and firmware lockups by guaranteeing 140ms reset hold time even at 1.8V VCC. | Use Scenario: PLC I/O module operating in factory ambient (–40°C to +85°C) with unregulated 3.3V rail subject to motor switching noise. IC Role / Device Role / Timing Role: Provides temperature-stable reset supervision with ±2.5% threshold accuracy and 100ns MR glitch rejection. Use Value: Eliminates need for external RC debounce on MR line while maintaining valid reset signaling down to VCC = 1.0V during rail collapse. |
| Automotive Body Control Module | Medical Sensor Node |
Use Scenario: Low-power BCM sub-system powered from vehicle battery (9V–16V) with local 2.7V LDO feeding MCU and CAN transceiver. IC Role / Device Role / Timing Role: Supervises 2.7V domain and interfaces to MCU reset pin via push-pull output; MR supports service-mode reinitialization. Use Value: AEC-Q100 qualified variant available; 140ms timeout aligns with ISO 16750-2 cold-crank recovery timing requirements. | Use Scenario: Disposable wearable ECG patch with CR2032 coin cell and ultra-low-power ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Ensures safe boot sequence under marginal battery voltage (1.8V–2.2V) and enables button-activated self-test via MR. Use Value: 3μA supply current extends operational life beyond 24 months; push-pull output avoids leakage path through external pullup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS27D3+T | Same electrical specs and SC70-4 package; lead-free but not automotive qualified | Lacks AEC-Q100 qualification; suitable for commercial/industrial use only | Select when automotive qualification is not required and RoHS compliance suffices |
| TPS3808G33DBVR | 2.93V threshold (not 2.70V); 200ms timeout; SOT-23-5 package; higher 8μA ICC | Requires PCB layout change; no MR input - uses separate EN pin for enable control | Choose only if 2.93V threshold matches system margin and SOT-23-5 footprint is acceptable |
Compared with MAX6385XS27D3-T, the MAX6385XS27D3+T offers identical performance in non-automotive settings, while TPS3808G33DBVR demands board redesign and lacks MR functionality - making MAX6385XS27D3-T optimal for space-constrained, MR-enabled, 2.7V-supervised systems.
Availability
MAX6385XS27D3-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller supervision, automotive body control modules, and medical sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS27D3-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, high-accuracy reset supervision for microprocessors in space- and energy-constrained systems where reliability across wide temperature ranges is critical.
FAQ
What is the exact reset threshold voltage of the MAX6385XS27D3-T?
The MAX6385XS27D3-T has a factory-set nominal reset threshold of 2.70V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "27" corresponds to VTH(nom) = 2.70V, VTH(min) = 2.63V, and VTH(max) = 2.77V at +25°C.
Does the MAX6385XS27D3-T support manual reset functionality?
Yes, the MAX6385XS27D3-T includes a dedicated active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces reset assertion regardless of VCC level, and the device holds reset for 140ms after MR is released. This feature is explicitly documented in the Pin Description and Features sections for MAX6384/MAX6385/MAX6386/MAX6390 variants.
What package type and dimensions does the MAX6385XS27D3-T use?
The MAX6385XS27D3-T is packaged in a 4-pin SC70 (SOT-323) outline, designated as package code X4+1, with outline number 21-0098 and land pattern 90-0187. Its physical dimensions are 2.0mm × 2.1mm × 0.95mm, and it is RoHS-compliant as indicated by the "+" suffix in the part number.
Is the MAX6385XS27D3-T qualified for automotive applications?
No, the MAX6385XS27D3-T is not AEC-Q100 qualified. While the MAX6381–MAX6390 family includes /V automotive variants (e.g., MAX6385XS27D3/V+T), the "-T" suffix denotes tape-and-reel packaging without automotive qualification. For automotive use, the /V version must be specified - the standard -T part is intended for commercial and industrial applications.
What is the minimum VCC voltage at which the MAX6385XS27D3-T guarantees correct reset output behavior?
The MAX6385XS27D3-T guarantees valid RESET output logic states (VOH ≥ 0.8×VCC, VOL ≤ 0.3V) down to VCC = 1.0V. This is explicitly stated in the Electrical Characteristics table under "Reset Output State Guaranteed Valid Down to VCC = 1V" and verified across temperature in the Typical Operating Characteristics plots.
MAX6385XS27D3-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:
- 2.7V
- 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
MAX6385XS27D3-T FAQ
1.How can I place an order for MAX6385XS27D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS27D3-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 MAX6385XS27D3-T reliable?
The price and inventory of MAX6385XS27D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS27D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS27D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS27D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS27D3-T?
MAX6385XS27D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS27D3-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 MAX6385XS27D3-T?
For technical support, including MAX6385XS27D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS27D3-T requirements.
6.How does Aetrix verify that MAX6385XS27D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS27D3-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 MAX6385XS27D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS27D3-T?
All MAX6385XS27D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS27D3-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 MAX6385XS27D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS27D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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