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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:4,063
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Product details
Overview
The MAX6381XR16D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit in a 3-pin SC70 package, featuring a factory-set 1.58V reset threshold, 140ms minimum VCC reset timeout, and active-low push-pull reset output. It monitors single-supply voltages from +1.8V to +5.0V with ±2.5% threshold accuracy over –40°C to +125°C and consumes only 3μA at +1.8V - ideal for battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6381XR16D3+T datasheet, MAX6381XR16D3+T pinout, MAX6381XR16D3+T application, or MAX6381XR16D3+T equivalent, key selection criteria include its fixed 1.58V reset threshold, guaranteed reset assertion down to VCC = 1V, immunity to negative-going VCC transients, compatibility with 1.8V/2.5V/3.3V/5V logic domains, and pin compatibility with legacy MAX809/MAX810 series supervisors.
Technical Context
This device implements a precision bandgap-based voltage comparator with internal hysteresis and a digital timeout counter. The reset assertion is triggered when VCC falls below the factory-trimmed 1.58V threshold (±2.5% over temperature), and the active-low push-pull output remains asserted for ≥140ms after VCC recovers above threshold.
No manual reset (MR) or auxiliary RESET IN inputs are present - consistent with the MAX6381 variant family. Its 3-pin SC70 configuration dedicates pins exclusively to VCC, GND, and RESET, eliminating unused terminals and minimizing board footprint for space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (factory-set, ±2.5% over –40°C to +125°C) - ensures deterministic reset initiation across industrial temperature range |
| Reset Timeout | 140ms min - guarantees μP initialization completes before code execution begins |
| 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 (down to 1V) |
| Output Type | Active-low push-pull - drives reset line directly without external pullup; sinks 3.2mA at VCC ≥ 4.5V |
| Temp Range | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint, compatible with high-density PCB assembly |
Pinout & Package
3-pin SC70 package (outline 21-0075, land pattern 90-0208), surface-mount, RoHS-compliant, lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull output; asserts low on VCC undervoltage; guaranteed valid down to VCC = 1V |
| 2 | VCC | Main supply input; monitored for reset condition; absolute max = +6.0V |
| 3 | GND | Analog/digital ground reference; must be low-impedance connection for stable threshold accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.58V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in portable medical and sensor nodes beyond 10 years |
| Robust transient immunity | Immune to negative-going VCC glitches ≤100µs at 100mV overdrive - prevents spurious resets in noisy power rails |
| Valid reset down to 1V supply | Guaranteed correct logic state of RESET output even as VCC collapses - ensures fail-safe behavior during power failure |
| Pb-free 3-pin SC70 package | 1.25mm × 0.85mm footprint with 0.65mm pitch - enables placement in ultra-compact wearables and modules |
Applications
| Industrial PLC I/O Module | Battery-Powered Environmental Sensor |
|---|---|
Use Scenario: Monitors 3.3V I/O rail in programmable logic controller modules exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 MCU during brownout or cold-start. Use Value: 140ms timeout ensures firmware bootloader completes initialization before peripheral drivers engage; ±2.5% threshold stability prevents false resets at –40°C. | Use Scenario: Powers soil moisture and temperature node using CR2032 coin cell with intermittent LoRaWAN transmission. IC Role / Device Role / Timing Role: Single-supply supervisor enabling reliable wake-up and reset sequencing after deep sleep (<1μA system current). Use Value: 3μA supply current minimizes standby drain; 1.58V threshold aligns with LiMnO₂ cell end-of-life voltage, triggering graceful shutdown before data corruption. |
| Automotive Body Control Unit | Medical Point-of-Care Diagnostic Device |
Use Scenario: Embedded in 12V-to-3.3V converted subsystem monitoring microcontroller supply in door module. IC Role / Device Role / Timing Role: Reset generator ensuring MCU enters known state after ignition cycle or load-dump recovery. Use Value: AEC-Q100 qualified variant available; 140ms timeout accommodates slow-ramping post-DC-DC startup; 1.58V threshold avoids false triggers during 12V battery sag. | Use Scenario: Used in handheld glucose meter with dual 1.8V analog front-end and 3.3V digital core. IC Role / Device Role / Timing Role: Primary reset supervisor coordinating power-up sequence between ADC, MCU, and display driver. Use Value: Valid RESET output down to VCC = 1V prevents latch-up during rapid battery depletion; SC70 package fits within tight 20mm × 30mm PCB constraint. |
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 | Same 1.58V threshold and 140ms timeout, but rated only to +85°C; 3-pin SOT23 package (larger than SC70) | Not suitable for under-hood or extended-temperature industrial use; requires larger PCB area | Select when cost sensitivity outweighs temperature range and size requirements |
| TPS3808G15DBVR | 1.55V threshold (±0.5%), 200ms timeout, 1.8–6V operation; 5-pin SOT23 - adds MR input and enable pin | Offers manual reset and enable control, but increases pin count and design complexity | Choose when system-level reset coordination (e.g., watchdog-triggered reset) is required |
Compared with MAX809TRD3+T, the MAX6381XR16D3+T delivers extended temperature support and smaller footprint; versus TPS3808G15DBVR, it trades configurability for minimalism and lower BOM count in fixed-threshold, no-MR designs.
Availability
MAX6381XR16D3+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered environmental sensors, automotive body control units, and medical point-of-care diagnostic devices 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, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.
The MAX6381–MAX6390 family targets space- and power-constrained embedded systems needing highly accurate, low-current reset supervision - especially where small footprint, guaranteed timing, and wide temperature operation are critical.
FAQ
What is the exact reset threshold voltage of the MAX6381XR16D3+T?
The MAX6381XR16D3+T has a factory-set 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 laser-trimmed during production and does not require external components. At +25°C, the typical threshold is 1.58V, and the min/max limits are 1.54V and 1.61V respectively - confirmed in the Reset Thresholds table of the official datasheet.
Does the MAX6381XR16D3+T include a manual reset (MR) input?
No, the MAX6381XR16D3+T does not include a manual reset input. It belongs to the MAX6381 subfamily, which features only VCC monitoring and an active-low push-pull RESET output. Manual reset capability is present only in MAX6384/MAX6385/MAX6386 and MAX6390 variants - confirmed by the Selector Guide and Pin Description tables showing MR pin absence for MAX6381.
What is the minimum supply voltage at which the MAX6381XR16D3+T guarantees correct RESET output logic state?
The MAX6381XR16D3+T guarantees valid RESET output logic state down to VCC = 1.0V. Below this level, the internal circuitry may not maintain defined output behavior. This specification ensures fail-safe reset assertion during deep brownout conditions - explicitly stated in the Electrical Characteristics table under "RESET Output State Guaranteed Valid Down to VCC = 1V".
Is the MAX6381XR16D3+T pin-compatible with the MAX809 series?
Yes, the MAX6381XR16D3+T is pin-compatible with the MAX809/MAX810 series in the same 3-pin SC70 package configuration. Both share identical pin 1 (RESET), pin 2 (VCC), and pin 3 (GND) assignments and electrical interface characteristics. This compatibility is explicitly noted in the Features section and validated by matching pin descriptions and top-view diagrams in the datasheet.
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 0.65mm pin pitch. It is RoHS-compliant and lead-free ("+T" suffix), and thermal resistance θJA is 340.4°C/W on a multilayer board - all specified in the Package Information section of the datasheet.
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:
- 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+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.
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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.
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