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Analog Devices Inc./Maxim Integrated MAX6381XR16D1+
- Part No.:
- MAX6381XR16D1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR16D1+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,611
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Product details
Overview
MAX6381XR16D1+ from Maxim Integrated is a low-power microprocessor supervisory circuit in 3-pin SC70 package, featuring factory-set 1.58V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, active-low push-pull reset output, and guaranteed operation down to VCC = 1V. It monitors single supply voltage in battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6381XR16D1+ datasheet, MAX6381XR16D1+ pinout, MAX6381XR16D1+ application, or MAX6381XR16D1+ equivalent, key selection criteria include reset threshold accuracy, ultra-low 3μA supply current at 1.8V, SC70 footprint compatibility, negative-going transient immunity, and absence of manual reset or auxiliary input functionality in this variant.
Technical Context
The MAX6381XR16D1+ implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across temperature, paired with a monolithic RC timer for deterministic 1ms reset assertion after VCC recovery. Its push-pull active-low RESET output drives directly into μP reset inputs without external pullup.
No manual reset (MR) or auxiliary RESET IN pins are present-this is a minimal-function, single-supply monitor optimized for space-constrained applications where only VCC supervision is required and board-level reset initiation is handled externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (nominal), ±2.5% over -40°C to +125°C - ensures reliable detection of 1.8V supply brownout before system instability |
| Reset Timeout | 1ms (minimum) - guarantees sufficient reset hold time for fast-boot microcontrollers |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor on RESET line |
| Package | 3-pin SC70 (2.0mm × 2.1mm) - fits high-density PCB layouts with minimal footprint |
| Temperature Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
3-pin SC70 package (X3+2 land pattern, 0.65mm pitch), surface-mount, RoHS-compliant, lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low when VCC < 1.58V; deasserts high after 1ms timeout - directly interfaces μP /RESET pin |
| 2 | VCC | Main supply input and monitored voltage source - powers internal circuitry and sets reset condition |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.58V with ±2.5% accuracy over full temperature range - eliminates external resistor divider calibration |
| Ultra-low quiescent current | 3μA at 1.8V - reduces standby power in always-on edge devices |
| Guaranteed reset validity down to VCC = 1V | Ensures correct logic state on RESET output even during severe undervoltage - prevents spurious release |
| Negative-going VCC transient immunity | Rejects sub-10µs glitches below threshold - avoids false resets in electrically noisy environments |
| SC70 footprint compatibility | Pins align with industry-standard 3-pin SC70 layout - enables drop-in replacement for legacy supervisors |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless temperature sensor powered by CR2032 coin cell operates intermittently, waking every 5 minutes to sample and transmit data. IC Role / Device Role / Timing Role: MAX6381XR16D1+ asserts /RESET during power-up and brownout, holding the MCU in reset until stable 1.8V rail is confirmed for ≥1ms. Use Value: Prevents firmware execution errors caused by marginal VCC, extending battery life via deterministic low-current supervision (3μA). | Use Scenario: An isolated digital input module in a factory automation cabinet receives 24V DC, regulated down to 3.3V for logic; voltage dips occur during relay switching. IC Role / Device Role / Timing Role: MAX6381XR16D1+ continuously monitors the 3.3V rail and triggers a clean hardware reset if it falls below 1.58V for >1ms. Use Value: Eliminates lockups due to transient undervoltage, improving system uptime without adding debounce circuitry or manual reset switches. |
| Automotive Body Control Module (BCM) | Medical Wearable Diagnostic Patch |
Use Scenario: A BCM subassembly supplies 1.8V to an ASIL-B microcontroller; cold-cranking causes VCC to dip below 2.0V momentarily. IC Role / Device Role / Timing Role: MAX6381XR16D1+ detects the 1.58V threshold breach and holds /RESET asserted for 1ms after recovery - meeting ISO 16750-2 pulse 4 requirements. Use Value: Ensures deterministic restart after engine cranking transients, with AEC-Q100 qualification validated for automotive under-hood use. | Use Scenario: A disposable ECG patch uses a 1.5V alkaline button cell stepping up to 1.8V; voltage sags during RF transmission bursts. IC Role / Device Role / Timing Role: MAX6381XR16D1+ monitors the regulated 1.8V rail and forces MCU reset if sag exceeds 1.58V threshold - preventing corrupted ECG waveform capture. Use Value: Guarantees clinical-grade data integrity by enforcing safe reset behavior at ultra-low current (3μA), preserving battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD1+T | Same 3-pin SC70 package, 1.63V reset threshold (±2%), 140ms timeout - no 1ms option | Not suitable where short reset hold time is required (e.g., fast-boot MCUs) | Select MAX6381XR16D1+ when 1ms timeout and 1.58V threshold are mandatory |
| TPS3123QDBVRQ1 | Automotive-grade, 1.63V threshold, 200ms timeout, 1.8V–5.5V operation - higher 8μA ICC at 1.8V | Requires longer reset assertion; higher current draw reduces battery life in portable designs | Choose MAX6381XR16D1+ for lowest power and shortest timeout in non-automotive space-constrained apps |
Compared with MAX809TRD1+T and TPS3123QDBVRQ1, the MAX6381XR16D1+ uniquely delivers 1ms reset timeout with 1.58V threshold and 3μA supply current in 3-pin SC70 - making it optimal for ultra-low-power, fast-recovery embedded systems where timing precision and current budget are critical.
Availability
MAX6381XR16D1+ is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC I/O modules, and medical wearable diagnostic patches requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6381XR16D1+ 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 power, sensing, and interface applications, with emphasis on reliability and low-power operation.
The MAX6381–MAX6390 family targets space- and power-constrained microprocessor supervision, delivering factory-trimmed reset thresholds, multiple timeout options, and robust transient immunity in miniature SC70/μDFN packages.
FAQ
What is the exact reset threshold voltage of MAX6381XR16D1+ and how accurate is it over temperature?
The MAX6381XR16D1+ has a nominal reset threshold of 1.58V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet, ensuring reliable brownout detection across automotive and industrial environments without external calibration.
Does MAX6381XR16D1+ include a manual reset input (MR) or auxiliary RESET IN pin?
No, the MAX6381XR16D1+ does not include MR or RESET IN functionality. It is a minimal-feature variant in the MAX6381–MAX6390 family, providing only VCC monitoring with active-low push-pull RESET output. Pin configuration confirms only RESET, VCC, and GND - consistent with the MAX6381/MAX6382/MAX6383 group.
What is the minimum reset timeout period supported by MAX6381XR16D1+ and how is it implemented?
The MAX6381XR16D1+ provides a 1ms minimum reset timeout period (suffix D1), implemented via an internal RC timer that holds the active-low RESET output asserted for ≥1ms after VCC rises above 1.58V. This value is production-guaranteed and applies across the full temperature range, enabling compatibility with fast-boot microcontrollers.
Can MAX6381XR16D1+ operate reliably when VCC drops below 1.8V, and down to what voltage does its RESET output remain valid?
Yes, the MAX6381XR16D1+ operates reliably down to VCC = 1.0V, and its RESET output state is guaranteed valid at all times within that range. The datasheet explicitly states "Reset Output State Guaranteed Valid Down to VCC = 1V", ensuring deterministic behavior during deep brownout conditions common in battery-depleted systems.
Is MAX6381XR16D1+ pin-compatible with other members of the MAX6381–MAX6390 family in the same package?
Yes, all 3-pin SC70 variants in the MAX6381–MAX6390 family share identical pinout: Pin 1 = RESET, Pin 2 = VCC, Pin 3 = GND. The MAX6381XR16D1+ is therefore pin-compatible with MAX6381XRxxDx+, MAX6382XRxxDx+, and MAX6383XRxxDx+ in the same package - allowing design reuse across different threshold/time combinations.
MAX6381XR16D1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.58V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6381XR16D1+ FAQ
1.How can I place an order for MAX6381XR16D1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR16D1+ 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 MAX6381XR16D1+ reliable?
The price and inventory of MAX6381XR16D1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR16D1+ is usually 5 days.
3.What payment methods are accepted for MAX6381XR16D1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR16D1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR16D1+?
MAX6381XR16D1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR16D1+ 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 MAX6381XR16D1+?
For technical support, including MAX6381XR16D1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR16D1+ requirements.
6.How does Aetrix verify that MAX6381XR16D1+ is sourced from the original manufacturer or authorized distributors?
All MAX6381XR16D1+ 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 MAX6381XR16D1+ meets industry standards.
7.What is the process for return or replacement of MAX6381XR16D1+?
All MAX6381XR16D1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR16D1+, 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 MAX6381XR16D1+ part is unused and in its original packaging.
Return procedure for MAX6381XR16D1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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