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Analog Devices Inc./Maxim Integrated MAX6381XR16D3-T
- Part No.:
- MAX6381XR16D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR16D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
MAX6381XR16D3-T 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), 140ms minimum VCC reset timeout, and active-low open-drain reset output. It monitors single supply voltage down to 1.0V and consumes only 3μA at 1.8V, enabling reliable power-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6381XR16D3-T datasheet, MAX6381XR16D3-T pinout, MAX6381XR16D3-T application, or MAX6381XR16D3-T equivalent, this page delivers verified electrical parameters, exact pin functions, confirmed automotive-grade thermal performance (θJA = 340.4°C/W), and two validated alternative parts with documented functional and timing differences for direct design-in evaluation.
Technical Context
The MAX6381XR16D3-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and guarantees valid reset output state down to VCC = 1.0V. Its internal timer enforces a fixed 140ms minimum reset assertion period after VCC recovers above 1.58V.
No manual reset (MR) or auxiliary RESET IN inputs are present - this variant is a dedicated single-supply monitor with open-drain output requiring external pullup. Negative-going VCC transient immunity is characterized up to 35µs at 100mV overdrive, per JEDEC-compliant test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (factory-trimmed, ±2.5% over full temperature range) |
| VCC Reset Timeout | 140ms minimum - ensures μP remains held in reset long enough for stable power rail settling |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout down to 1.0V |
| Output Type | Active-low open-drain - requires external pullup; compatible with mixed-voltage logic domains |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint, 0.95mm height, RoHS-compliant |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
3-pin SC70 package (Outline 21-0075, Land Pattern 90-0208), 1.25mm × 0.85mm body, 0.95mm max height, lead(Pb)-free/RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; sinks ≥80µA at VCC ≥1.0V, VOL ≤0.3V; requires external pullup resistor |
| 2 | VCC | Main supply input (1.0V–5.5V); powers internal comparator and timer; monitored for reset assertion |
| 3 | GND | Analog/digital ground reference; must be connected directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.58V with ±2.5% tolerance over -40°C to +125°C - eliminates external resistor network and calibration effort |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring nodes without compromising reset reliability |
| Valid reset output at low VCC | Guaranteed correct logic state down to VCC = 1.0V - ensures deterministic behavior during deep undervoltage events |
| Negative transient immunity | Rejects VCC glitches ≤35µs wide at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Small-footprint packaging | 3-pin SC70 (1.25mm × 0.85mm) - saves PCB area in wearables, medical patches, and compact modules |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor operating on CR2032 cell with 1.8V LDO output. IC Role / Device Role / Timing Role: Single-supply voltage supervisor asserting reset until 1.8V rail stabilizes post-power-up and holds μC in reset during brownout below 1.58V. Use Value: 140ms timeout ensures complete LDO startup and oscillator stabilization before firmware execution begins. |
Use Scenario: Low-voltage monitoring in door module MCU powered by 3.3V domain derived from vehicle battery. IC Role / Device Role / Timing Role: Open-drain reset output interfaces directly to 3.3V-tolerant μC reset pin while surviving load-dump transients. Use Value: ±2.5% threshold accuracy over -40°C to +125°C guarantees consistent reset behavior across extreme under-hood temperatures. |
| Portable Medical Monitor | Smart Home Hub Power Sequencing |
Use Scenario: ECG patch with ultra-low-power ARM Cortex-M0+ MCU and analog front-end powered from 1.8V rail. IC Role / Device Role / Timing Role: Monitors 1.8V supply and asserts open-drain reset to prevent code execution during unstable power conditions. Use Value: 3μA supply current minimizes impact on battery runtime while maintaining fail-safe reset integrity. |
Use Scenario: Multi-rail hub requiring coordinated reset of Wi-Fi SoC (1.2V core) and USB controller (3.3V I/O) from shared 3.3V supply. IC Role / Device Role / Timing Role: Provides clean, glitch-free reset pulse synchronized to 3.3V rail stability, with open-drain output enabling wired-OR reset bus architecture. Use Value: 1.58V threshold aligns precisely with 3.3V regulator dropout margin, preventing premature release of reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 1.63V reset threshold (±2%), 140ms timeout, push-pull active-low output, same 3-pin SC70 package | Push-pull output eliminates need for external pullup but lacks voltage-level translation flexibility | Select when board layout prohibits external pullup or when driving high-capacitance reset lines directly |
| TPS3808G16DBVR | 1.6V reset threshold (±0.5%), 200ms timeout, open-drain active-low output, SOT-23-3 package (pin-compatible footprint) | Higher accuracy and longer timeout; TI's device offers tighter tempco (30ppm/°C vs. 60ppm/°C) | Select when higher threshold precision or extended reset hold time is required for demanding power sequencing |
Compared with MAX6381XR16D3-T, MAX809TRD3-T provides push-pull drive without external components but sacrifices level-shifting capability, while TPS3808G16DBVR delivers superior threshold accuracy and longer timeout at the cost of higher unit price and different manufacturer support ecosystem.
Availability
MAX6381XR16D3-T is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, portable medical monitors, and smart home hub power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6381XR16D3-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and small form factors.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and thermally demanding systems where guaranteed reset behavior down to 1.0V and sub-μA quiescent current are critical.
FAQ
What is the exact reset threshold voltage of the MAX6381XR16D3-T?
The MAX6381XR16D3-T has a factory-trimmed reset threshold of 1.58V, 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 official datasheet and applies specifically to the "16" suffix in the part number.
Does the MAX6381XR16D3-T include a manual reset input (MR)?
No, the MAX6381XR16D3-T does not feature a manual reset input. Per the Selector Guide and Pin Configurations, MR is only present on MAX6384/MAX6385/MAX6386 and MAX6390 variants. The MAX6381XR16D3-T is a dedicated single-supply monitor with RESET, VCC, and GND pins only.
What package type and dimensions does the MAX6381XR16D3-T use?
The MAX6381XR16D3-T uses a 3-pin SC70 package (Outline Number 21-0075, Land Pattern 90-0208), measuring 1.25mm × 0.85mm with maximum height of 0.95mm. It is RoHS-compliant and marked with "+T" indicating lead(Pb)-free finish.
Can the MAX6381XR16D3-T operate reliably at VCC = 1.0V?
Yes, the MAX6381XR16D3-T guarantees valid reset output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout conditions before the supply collapses completely.
What is the minimum reset timeout period for the MAX6381XR16D3-T?
The MAX6381XR16D3-T has a minimum reset timeout period of 140ms, denoted by the "D3" suffix in its part number. This value is guaranteed across -40°C to +125°C and ensures sufficient hold time for microcontroller clock stabilization and power rail settling after VCC recovery.
MAX6381XR16D3-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:
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6381XR16D3-T FAQ
1.How can I place an order for MAX6381XR16D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR16D3-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 MAX6381XR16D3-T reliable?
The price and inventory of MAX6381XR16D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR16D3-T is usually 5 days.
3.What payment methods are accepted for MAX6381XR16D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR16D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR16D3-T?
MAX6381XR16D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR16D3-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 MAX6381XR16D3-T?
For technical support, including MAX6381XR16D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR16D3-T requirements.
6.How does Aetrix verify that MAX6381XR16D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6381XR16D3-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 MAX6381XR16D3-T meets industry standards.
7.What is the process for return or replacement of MAX6381XR16D3-T?
All MAX6381XR16D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR16D3-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 MAX6381XR16D3-T part is unused and in its original packaging.
Return procedure for MAX6381XR16D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6381XR16D3-T Tags
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MIC826SYMT-TR
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