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Analog Devices Inc./Maxim Integrated MAX6381XR16D3
- Part No.:
- MAX6381XR16D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR16D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,429
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Product details
Overview
MAX6381XR16D3 from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 1.58V reset threshold, 140ms 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 and low-voltage embedded systems, consuming only 3µA at +1.8V.
For engineers reviewing the MAX6381XR16D3 datasheet, MAX6381XR16D3 pinout, MAX6381XR16D3 application, or MAX6381XR16D3 equivalent, this page delivers verified electrical specs, SC70-3 package mapping, reset timing behavior under brownout, and substitution guidance for industrial power-monitoring designs.
Technical Context
The MAX6381XR16D3 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms (min) reset assertion after VCC recovers above 1.58V.
No manual reset input or auxiliary RESET IN is present - it is a dedicated single-supply monitor with open-drain output requiring an external pullup. Reset state remains valid even as VCC drops to 1.0V, ensuring deterministic µP initialization during deep brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (factory-set, ±2.5% over –40°C to +125°C) - sets precise brownout detection point for 1.8V logic rails |
| Reset Timeout | 140ms minimum - ensures µP reset pulse exceeds boot ROM initialization time |
| Supply Current | 3µA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion during severe undervoltage down to 1.0V |
| Output Type | Active-low open-drain - allows wired-OR reset bus sharing across multiple supervisors |
| Package | 3-pin SC70 (X3-2) - 1.25mm × 0.85mm footprint for space-constrained portable PCBs |
| Temp Range | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6381XR16D3 is housed in a 3-pin SC70 package (pkg code X3-2), measuring 1.25mm × 0.85mm × 0.6mm with gull-wing leads. Pin 1 = RESET (active-low open-drain), Pin 2 = VCC, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output - requires external pullup; asserts low when VCC < 1.58V |
| 2 | VCC | Main supply input and monitored rail - powers device and serves as reset threshold reference |
| 3 | GND | Analog/digital ground reference - must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed threshold | 1.58V with ±2.5% tolerance over full temperature range - eliminates external resistor divider calibration |
| Ultra-low ICC | 3µA at 1.8V - extends battery life in always-on monitoring nodes without sacrificing reset reliability |
| Valid reset at low VCC | Guaranteed correct logic state down to VCC = 1.0V - prevents spurious release during slow power-down |
| Negative transient immunity | Rejects sub-10µs VCC glitches below threshold - avoids false resets in electrically noisy environments |
| SC70-3 footprint | 1.25mm × 0.85mm body - fits into <1.5mm² board area, enabling dense portable PCB layouts |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Coin-cell–powered environmental sensor transmitting data every 5 minutes via BLE. IC Role / Device Role / Timing Role: Supervises 1.8V MCU core rail and triggers hard reset if battery sags below 1.6V during transmit burst. Use Value: 3µA quiescent current extends 200mAh CR2032 lifetime beyond 5 years; 140ms timeout exceeds MSP430FR59xx boot time. | Use Scenario: DIN-rail mounted analog input module operating from 24VDC converted to 3.3V/1.8V rails. IC Role / Device Role / Timing Role: Monitors 1.8V FPGA configuration rail and holds reset until stable post-power-up. Use Value: ±2.5% threshold accuracy ensures reliable startup across –40°C to +70°C ambient; SC70-3 eases thermal relief layout near isolated DC/DC. |
| Automotive Body Control Unit | Medical Wearable ECG Front-End |
Use Scenario: Low-power microcontroller managing door lock actuators and interior lighting. IC Role / Device Role / Timing Role: Resets MCU when 5V supply dips below 1.58V during load dump recovery. Use Value: –40°C to +125°C rating matches under-dash thermal profile; open-drain output interfaces directly to 5V-tolerant µP reset pin. | Use Scenario: Ultra-low-noise analog front-end acquiring biopotential signals with 1.2V LDO supply. IC Role / Device Role / Timing Role: Guarantees clean reset of ADC/DSP subsystem before signal acquisition begins. Use Value: Valid reset assertion down to VCC = 1.0V prevents metastability during LDO soft-start; 140ms timeout accommodates TPS7A05 stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3 | Same 1.58V threshold and 140ms timeout, but push-pull active-low output (no external pullup required) | Suitable where board space permits larger SOT-23-3 and no shared reset bus is needed | Select MAX809TRD3 if eliminating external pullup resistor simplifies BOM and layout |
| TPS3808G16DBVR | 1.6V threshold (±0.5%), 200ms timeout, 1.5µA ICC at 1.8V, SOT-23-5 package with manual reset input | Offers lower current and MR capability but requires 2 extra pins and different footprint | Choose TPS3808G16DBVR only if manual reset functionality and tighter threshold tolerance justify redesign |
Compared with MAX6381XR16D3, MAX809TRD3 removes the need for an external pullup resistor but lacks the same level of negative transient immunity; TPS3808G16DBVR provides superior threshold accuracy and lower ICC but introduces pin count and layout complexity not justified in fixed-function reset-only roles.
Availability
MAX6381XR16D3 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6381XR16D3 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 high-reliability industrial and automotive markets.
The MAX6381–MAX6390 family was engineered specifically for ultra-low-power, single-rail microprocessor supervision in space- and energy-constrained systems - prioritizing sub-µA ICC, wide temperature operation, and factory-trimmed thresholds to eliminate calibration overhead.
FAQ
What is the exact reset threshold voltage of MAX6381XR16D3?
The MAX6381XR16D3 has a factory-set reset threshold of 1.58V (minimum), with nominal 1.58V and maximum 1.61V across –40°C to +125°C per the datasheet's Reset Thresholds table (suffix "16"). This value is trimmed during production and guaranteed within ±2.5% over temperature, making it suitable for monitoring 1.8V logic supplies with margin.
Does MAX6381XR16D3 include a manual reset input (MR)?
No, MAX6381XR16D3 does not feature a manual reset input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which lacks MR functionality. Only MAX6384–MAX6390 variants include MR. The MAX6381XR16D3 is a dedicated VCC-only supervisor with open-drain RESET output, simplifying design where external reset triggering is unnecessary.
What package type and dimensions does MAX6381XR16D3 use?
MAX6381XR16D3 uses the 3-pin SC70 package (pkg code X3-2), with body dimensions of 1.25mm × 0.85mm × 0.6mm and gull-wing lead pitch of 0.65mm. This compact footprint is documented in Maxim's package outline 21-0075 and supports reflow soldering per JEDEC J-STD-020 standards.
Can MAX6381XR16D3 operate reliably below 1.8V supply?
Yes, MAX6381XR16D3 operates reliably down to VCC = 1.0V. Its reset output state is guaranteed valid at 1.0V, and supply current remains at 3µA (typical) at 1.8V, rising only modestly at lower voltages. This enables robust brownout detection in systems powered by depleting batteries or low-dropout regulators with soft-start behavior.
Is MAX6381XR16D3 pin-compatible with other reset ICs like MAX809?
MAX6381XR16D3 is not pin-compatible with MAX809 due to differing pinouts: MAX6381XR16D3 uses SC70-3 (RESET/VCC/GND), while MAX809 uses SOT-23-3 (VCC/GND/RESET). Though both are 3-pin supervisors, their pin assignments differ - direct replacement would require PCB layout modification. However, they share functional equivalence for 1.58V/140ms supervision.
MAX6381XR16D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6381XR16D3 FAQ
1.How can I place an order for MAX6381XR16D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR16D3 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 MAX6381XR16D3 reliable?
The price and inventory of MAX6381XR16D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR16D3 is usually 5 days.
3.What payment methods are accepted for MAX6381XR16D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR16D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR16D3?
MAX6381XR16D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR16D3 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 MAX6381XR16D3?
For technical support, including MAX6381XR16D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR16D3 requirements.
6.How does Aetrix verify that MAX6381XR16D3 is sourced from the original manufacturer or authorized distributors?
All MAX6381XR16D3 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 MAX6381XR16D3 meets industry standards.
7.What is the process for return or replacement of MAX6381XR16D3?
All MAX6381XR16D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR16D3, 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 MAX6381XR16D3 part is unused and in its original packaging.
Return procedure for MAX6381XR16D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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