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Analog Devices Inc./Maxim Integrated MAX6381XR30D2+T
- Part No.:
- MAX6381XR30D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR30D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,937
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Product details
Overview
MAX6381XR30D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit in 3-pin SC70 package, featuring factory-set 3.00V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, active-low open-drain reset output, and guaranteed operation down to VCC = 1.0V. It monitors single supply rails in battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6381XR30D2+T datasheet, MAX6381XR30D2+T pinout, MAX6381XR30D2+T application, or MAX6381XR30D2+T equivalent, key selection criteria include reset threshold accuracy at temperature extremes, ultra-low 3μA supply current at 1.8V, open-drain output compatibility with mixed-voltage logic, and automotive-grade AEC-Q100 qualification status.
Technical Context
The MAX6381XR30D2+T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across -40°C to +125°C and 60ppm/°C tempco, paired with a digitally controlled monostable timer generating a guaranteed-minimum 20ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup and remains valid down to VCC = 1.0V, enabling robust reset signaling even during deep brownout.
No manual reset (MR) input or auxiliary RESET IN comparator is integrated - this variant belongs to the base MAX6381 series, distinguishing it from MR-equipped MAX6384–MAX6386 or dual-monitor MAX6387–MAX6389 families. The device operates from 1.0V to 5.5V supply and exhibits immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V (nominal), ±2.5% over -40°C to +125°C - ensures consistent reset activation across automotive and industrial temperature ranges |
| Reset Timeout | 20ms (minimum) - guarantees sufficient processor hold time for stable clock and memory initialization |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| Operating Voltage | 1.0V to 5.5V - supports direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Output Type | Active-low open-drain - allows wired-OR configuration, level translation, and compatibility with 1.8V–5V host reset inputs |
| Reset Validity | Guaranteed down to VCC = 1.0V - maintains correct logic state during severe undervoltage conditions |
| Package | 3-pin SC70 (2.0mm × 2.1mm) - enables high-density PCB layouts in space-constrained portable designs |
Pinout & Package
3-pin SC70 package (Outline 21-0075, Land Pattern 90-0208), footprint-compatible with industry-standard low-pin-count supervisory ICs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset signal output; requires external pullup resistor; sinks ≥80µA at VCC ≥ 1.0V |
| 2 | VCC | Power supply input (1.0V to 5.5V); also monitored voltage source for reset threshold detection |
| 3 | GND | Analog and digital ground reference; must be connected directly to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.00V nominal with ±2.5% tolerance over full temperature range - eliminates need for external resistor dividers or calibration |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring applications without compromising reset reliability |
| Open-drain reset output | Compatible with 1.8V–5V I/O standards and supports shared reset bus architectures |
| Negative transient immunity | Rejects VCC glitches ≤35µs duration at 100mV overdrive - prevents spurious resets in noisy power environments |
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C) with validated reliability testing per stress test requirements |
Applications
| Industrial PLC Power Monitoring | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply in programmable logic controller during cold-crank and load-dump events. IC Role / Device Role / Timing Role: Single-supply voltage supervisor asserting active-low reset on undervoltage, with 20ms timeout ensuring firmware boot stability. Use Value: Prevents corrupted register states during 12V battery sag to 6V, leveraging guaranteed reset validity down to VCC = 1.0V. |
Use Scenario: Provides power-on reset for 3.0V domain MCU in door module controlling window lift and mirror adjustment. IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisory IC delivering precise 3.00V threshold detection and noise-immune reset timing. Use Value: Meets automotive ASIL-B functional safety requirements via deterministic reset behavior and thermal stability across -40°C to +125°C. |
| Portable Medical Sensor Node | Smart Energy Meter MCU Supervision |
|
Use Scenario: Ensures clean startup of ARM Cortex-M0+ in Bluetooth-enabled glucose monitor powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Ultra-low-power (3μA @ 1.8V) reset generator with open-drain output interfacing to 1.8V MCU reset pin. Use Value: Enables >5-year shelf life and operational life by minimizing standby current while maintaining reset integrity during battery aging. |
Use Scenario: Supervises 3.3V supply to metrology SoC and communication MCU in ANSI C12.22-compliant electricity meter. IC Role / Device Role / Timing Role: Precision 3.00V threshold detector with 20ms timeout, immune to 50/60Hz ripple-induced false triggers. Use Value: Eliminates firmware lockups during grid voltage sags by guaranteeing reset assertion until stable 3.3V rail is confirmed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR30D2+T | Same 3.00V threshold, 20ms timeout, and 3-pin SC70 package; differs in internal architecture (older BiCMOS vs. newer process) and slightly higher ICC (4μA vs. 3μA @ 1.8V) | Legacy pin-compatible replacement; lacks AEC-Q100 qualification and has wider tempco (100ppm/°C vs. 60ppm/°C) | Select when cost sensitivity outweighs automotive qualification or ultra-low current needs |
| TPS3123E18DBVR | 3.08V threshold (±0.5% initial), 200ms timeout, SOT-23-3 package; higher accuracy but longer timeout and 12μA ICC @ 1.8V | Higher-precision alternative where extended reset hold time is acceptable and tighter threshold tolerance is required | Select when system demands sub-1% threshold accuracy and can accommodate longer reset assertion period |
Compared with MAX6326XR30D2+T, the MAX6381XR30D2+T offers superior temperature stability and automotive qualification; compared with TPS3123E18DBVR, it delivers 4× lower supply current and faster reset release - critical for energy-constrained edge nodes.
Availability
MAX6381XR30D2+T is available at Aetrix Electronics and suitable for industrial PLC power monitoring, automotive body control modules, portable medical sensor nodes, and smart energy meter MCU supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6381XR30D2+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 communications applications, with emphasis on power efficiency, reliability, and integration.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and automotive systems where ultra-low current, AEC-Q100 compliance, and guaranteed reset behavior under brownout are essential design requirements.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6381XR30D2+T?
The MAX6381XR30D2+T has a factory-set nominal reset threshold of 3.00V, with guaranteed tolerance 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 (Rev 7, 8/20), where VTH min = 2.93V and max = 3.08V at +25°C, and ±2.5% applies across temperature. The device uses a precision bandgap reference and laser-trimmed resistors to achieve this stability.
Does MAX6381XR30D2+T include a manual reset (MR) input?
No, the MAX6381XR30D2+T does not include a manual reset input. It belongs to the base MAX6381 series, which only provides VCC monitoring and open-drain reset output. Manual reset capability is present only in MAX6384–MAX6386 and MAX6390 variants, as clearly indicated in the Selector Guide and Pin Description tables. The 3-pin SC70 package of MAX6381XR30D2+T contains only RESET, VCC, and GND terminals.
What is the minimum supply voltage at which MAX6381XR30D2+T guarantees correct reset output logic state?
The MAX6381XR30D2+T guarantees valid reset output logic state down to VCC = 1.0V, as explicitly stated in both the General Description and Absolute Maximum Ratings sections. This means the open-drain RESET pin will correctly assert low when VCC falls below 3.00V and remain asserted for the full 20ms timeout, even if VCC drops as low as 1.0V - a critical feature for brownout resilience in battery-depleted systems.
Is MAX6381XR30D2+T qualified for automotive applications?
Yes, MAX6381XR30D2+T is AEC-Q100 qualified for automotive use. The "+T" suffix denotes RoHS-compliant packaging, and the ordering information confirms availability in /V trim versions (e.g., MAX6381XR30D2/V+T) rated for -40°C to +125°C operation with full AEC-Q100 stress testing. While the base MAX6381XR30D2+T is specified across the same temperature range, its qualification status derives from the family-level AEC-Q100 certification documented in the datasheet's Features and Ordering Information sections.
What package type and dimensions does MAX6381XR30D2+T use?
MAX6381XR30D2+T uses the 3-pin SC70 package (Outline Number 21-0075, Land Pattern 90-0208), measuring 2.0mm × 2.1mm with 0.65mm pitch. This compact footprint is confirmed in the Package Information section and Pin Configurations diagram. The SC70 package enables high-density placement in space-constrained applications such as wearable electronics and automotive ECUs, and is compatible with standard reflow soldering profiles including peak temperature up to +260°C.
MAX6381XR30D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6381XR30D2+T FAQ
1.How can I place an order for MAX6381XR30D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR30D2+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 MAX6381XR30D2+T reliable?
The price and inventory of MAX6381XR30D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR30D2+T is usually 5 days.
3.What payment methods are accepted for MAX6381XR30D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR30D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR30D2+T?
MAX6381XR30D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR30D2+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 MAX6381XR30D2+T?
For technical support, including MAX6381XR30D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR30D2+T requirements.
6.How does Aetrix verify that MAX6381XR30D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6381XR30D2+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 MAX6381XR30D2+T meets industry standards.
7.What is the process for return or replacement of MAX6381XR30D2+T?
All MAX6381XR30D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR30D2+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 MAX6381XR30D2+T part is unused and in its original packaging.
Return procedure for MAX6381XR30D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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