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Analog Devices Inc./Maxim Integrated MAX6381XR17D2+T
- Part No.:
- MAX6381XR17D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR17D2+T.pdf
- Description:
- IC MPU/RESET CIRC 1.70V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:35,000
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Product details
Overview
MAX6381XR17D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit in a 3-pin SC70 package, featuring a factory-set 1.67V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and active-low push-pull reset output. It monitors single-supply VCC from +1.8V to +5.0V while drawing only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - ideal for battery-powered embedded controllers requiring reliable power-on reset.
For engineers reviewing the MAX6381XR17D2+T datasheet, MAX6381XR17D2+T pinout, MAX6381XR17D2+T application, or MAX6381XR17D2+T equivalent, key selection considerations include its fixed 1.67V threshold accuracy, 20ms timeout timing, SC70 footprint compatibility with legacy MAX809/MAX810, and guaranteed operation at VCC ≥ 1V without external biasing.
Technical Context
The MAX6381XR17D2+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 monolithic RC timer generating a guaranteed-minimum 20ms reset assertion after VCC recovery. Its push-pull active-low RESET output drives directly into μP reset inputs without pullup resistors.
No manual reset (MR) or auxiliary RESET IN inputs are present - this variant is optimized for single-rail monitoring only. The device operates with full functionality from VCC = 1.0V to 5.5V and exhibits immunity to negative-going VCC transients up to 35µs at 100mV overdrive, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.67V nominal, ±2.5% over -40°C to +125°C - ensures deterministic reset initiation across automotive and industrial temperature ranges |
| Reset Timeout | 20ms minimum - guarantees sufficient hold time for μP initialization before release |
| 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 signaling even during deep brownout conditions |
| Output Type | Active-low push-pull - eliminates need for external pullup and reduces BOM count |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint compatible with space-constrained portable designs |
| Reset Propagation Delay | 35µs max (VCC falling at 10mV/µs) - ensures fast response to supply collapse |
Pinout & Package
MAX6381XR17D2+T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208) with exposed pad not connected internally. Pin 1 is RESET (active-low push-pull), Pin 2 is VCC, and Pin 3 is GND - no NC pins or auxiliary inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull output; asserts low when VCC < 1.67V and holds for ≥20ms after VCC recovery |
| 2 | VCC | Main supply input and monitored rail; powers internal circuitry and serves as reference for reset detection |
| 3 | GND | Analog/digital ground reference; must be low-impedance connection to ensure accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.67V with ±2.5% tolerance over full temperature range - eliminates external resistor divider and calibration effort |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring applications without compromising reset reliability |
| Valid reset down to 1.0V VCC | Guaranteed logic-level output even during severe brownout - prevents spurious release before stable supply |
| Transient-immune comparator | Rejects VCC glitches ≤35µs at 100mV overdrive - avoids false resets in noisy power environments |
| SC70 footprint compatibility | Pins match MAX809/MAX810 - enables drop-in replacement in existing layouts without PCB rework |
Applications
| Industrial PLC Controller Power Monitoring | Medical Wearable Sensor Boot Sequencing |
|---|---|
Use Scenario: Monitors 3.3V main supply in programmable logic controller I/O modules during cold start and brownout events. IC Role / Device Role / Timing Role: μP supervisory circuit asserting active-low reset to ARM Cortex-M4 core until stable 3.3V rail is confirmed. Use Value: 20ms timeout ensures firmware bootloader completes memory initialization before CPU execution begins. | Use Scenario: Ensures reliable boot of ultra-low-power ECG sensor SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Single-rail supervisor detecting 1.8V core supply collapse and holding reset until battery recovers above 1.67V. Use Value: 3μA supply current extends operational life beyond 3 years on single battery charge. |
| Automotive Body Control Module (BCM) | Smart Home Hub Power Integrity |
Use Scenario: Provides AEC-Q100–compliant reset for LIN bus transceiver MCU in door module under load-dump conditions. IC Role / Device Role / Timing Role: Supervises 5.0V regulated rail; asserts reset during transient-induced dips below 1.67V threshold. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents false resets in under-hood thermal cycling. | Use Scenario: Guarantees clean startup of dual-core application processor in Wi-Fi mesh hub after AC/DC adapter reconnect. IC Role / Device Role / Timing Role: Monitors 3.3V system rail; generates 20ms reset pulse to synchronize DDR memory initialization sequence. Use Value: Push-pull output drives processor reset pin directly - no pullup resistor required, reducing component count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Same 3-pin SC70 package, 1.63V reset threshold (±2.5%), 240ms timeout - longer delay, different threshold | Not suitable where 20ms timing is required for fast-boot processors | Select MAX809TRD2+T only if extended reset hold time is acceptable and threshold tolerance alignment is verified |
| TPS3808G16DBVR | 3-pin SOT-23, 1.6V threshold (±0.5%), adjustable timeout via capacitor - higher accuracy but requires external component | Requires layout change (SOT-23 vs SC70) and adds capacitor BOM item | Choose TPS3808G16DBVR when tighter threshold tolerance is critical and board space allows SOT-23 footprint |
Compared with MAX809TRD2+T and TPS3808G16DBVR, MAX6381XR17D2+T delivers precise 20ms timing in the smallest SC70 footprint with no external components - making it optimal for space- and timing-constrained embedded systems where 1.67V threshold alignment is required.
Availability
MAX6381XR17D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical wearables, automotive BCMs, and smart home hubs requiring stable component supply with AEC-Q100–compatible performance and long-term lifecycle support.
Supply support for MAX6381XR17D2+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 low-power, high-accuracy μP supervisory circuits targeting battery-operated and thermally demanding embedded systems requiring guaranteed reset behavior across wide voltage and temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6381XR17D2+T and how stable is it over temperature?
The MAX6381XR17D2+T has a factory-set nominal reset threshold of 1.67V, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is limited to ±0.015V across the entire temperature span - ensuring consistent reset behavior in automotive and industrial environments.
Does MAX6381XR17D2+T support manual reset functionality?
No, MAX6381XR17D2+T does not include a manual reset (MR) input. It is a basic single-supply supervisor with only VCC monitoring and active-low push-pull RESET output. For MR capability, consider MAX6384XR17D2+T or MAX6390XR17D4+T - both share the same 1.67V threshold and SC70 package but add debounced MR functionality.
Can MAX6381XR17D2+T operate reliably when VCC drops below 1.8V?
Yes, MAX6381XR17D2+T is fully specified down to VCC = 1.0V and guarantees correct RESET output logic state (low during reset, high otherwise) across that entire range. At 1.0V, it still draws only ~6μA and maintains ±2.5% threshold accuracy - enabling robust operation during deep brownout conditions where other supervisors fail.
What is the maximum negative-going VCC transient duration that MAX6381XR17D2+T can ignore without asserting reset?
Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive", MAX6381XR17D2+T rejects negative VCC transients up to 35µs in duration when the overdrive (VTH – VCC) is 100mV. As overdrive increases, allowable pulse width decreases - e.g., at 200mV overdrive, the limit drops to ~15µs. A 0.1µF ceramic capacitor at VCC improves immunity further.
Is MAX6381XR17D2+T pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6381XR17D2+T uses the identical 3-pin SC70 package (X3+2 outline) and pinout as MAX809/MAX810 - Pin 1 is RESET, Pin 2 is VCC, Pin 3 is GND. This allows direct PCB-level replacement without layout changes, though designers must verify that the 1.67V threshold and 20ms timeout meet system requirements.
MAX6381XR17D2+T 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:
- 1.67V
- 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
MAX6381XR17D2+T FAQ
1.How can I place an order for MAX6381XR17D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR17D2+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 MAX6381XR17D2+T reliable?
The price and inventory of MAX6381XR17D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR17D2+T is usually 5 days.
3.What payment methods are accepted for MAX6381XR17D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR17D2+T transactions.
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4.How is shipping managed for MAX6381XR17D2+T?
MAX6381XR17D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR17D2+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 MAX6381XR17D2+T?
For technical support, including MAX6381XR17D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR17D2+T requirements.
6.How does Aetrix verify that MAX6381XR17D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6381XR17D2+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 MAX6381XR17D2+T meets industry standards.
7.What is the process for return or replacement of MAX6381XR17D2+T?
All MAX6381XR17D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR17D2+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 MAX6381XR17D2+T part is unused and in its original packaging.
Return procedure for MAX6381XR17D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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