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Analog Devices Inc./Maxim Integrated MAX6382XR31D3
- Part No.:
- MAX6382XR31D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6382XR31D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
The MAX6382XR31D3 from Maxim Integrated is a single-supply, active-high push-pull microprocessor supervisory circuit with factory-set 3.08V reset threshold and 140ms minimum reset timeout. It monitors VCC from +1.8V to +5.0V, consumes only 3µA at +1.8V, guarantees valid reset output down to VCC = 1V, and is used in battery-powered embedded controllers requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6382XR31D3 datasheet, MAX6382XR31D3 pinout, MAX6382XR31D3 application, or MAX6382XR31D3 equivalent, this page delivers verified electrical parameters, SC70-3 package mapping, reset timing behavior under temperature variation, and real-world substitution guidance for industrial and portable electronics design.
Technical Context
The MAX6382XR31D3 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 rises above 3.08V, independent of supply ramp rate.
This device uses a push-pull output stage that drives high during reset assertion and low otherwise - eliminating external pull-up components. It lacks manual reset (MR) or auxiliary RESET IN inputs, distinguishing it from MAX6384–MAX6390 and MAX6387–MAX6389 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V (min), 3.08V (nom), 3.15V (max) - ensures reliable detection of 3.3V rail brownout before µP execution errors occur |
| Reset Timeout Period | 140ms (min) - holds reset asserted long enough for 3.3V rail stabilization and µP internal clock lock |
| Supply Current | 3µA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors without compromising supervision integrity |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset state down to 1V, allowing graceful shutdown sequencing in ultra-low-power systems |
| Reset Output Type | Active-high push-pull - eliminates need for external pull-up resistor and reduces BOM count vs. open-drain alternatives |
| Threshold Accuracy | ±2.5% over –40°C to +125°C - maintains consistent trip point across automotive and industrial ambient conditions |
| Tempco | 60ppm/°C - limits threshold drift to <±15mV over full temperature range, critical for stable reset margin in wide-temp designs |
Pinout & Package
MAX6382XR31D3 is packaged in a lead-free 3-pin SC70 (X3-2) surface-mount package measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained portable and wearable applications.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be connected directly to system ground plane |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion (VCC < 3.08V) and low otherwise; sinks/source capability defined per datasheet |
| 3 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and serves as reset threshold reference source |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V nominal with ±2.5% tolerance over full temperature range - eliminates external resistor divider calibration |
| Ultra-low quiescent current | 3µA at 1.8V - extends battery life in always-on monitoring nodes without sacrificing supervision reliability |
| Guaranteed reset validity | Valid logic levels maintained down to VCC = 1.0V - ensures deterministic µP initialization even during deep brownout |
| Push-pull output architecture | No external pull-up required - simplifies layout, reduces component count, and improves noise immunity vs. open-drain |
| Negative-going transient immunity | Immune to sub-10µs VCC glitches below threshold - prevents spurious resets in electrically noisy environments |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Power-up of isolated analog front-end ASICs in DIN-rail mounted controllers where 3.3V rail ramps slowly due to bulk capacitance. IC Role / Device Role / Timing Role: Supervises 3.3V VCC rail and asserts active-high RESET until rail stabilizes above 3.08V for ≥140ms, ensuring ADC/DAC calibration completes before firmware executes. Use Value: Prevents register corruption and sensor offset drift by guaranteeing µP remains held in reset until analog supply meets precision timing requirements. |
Use Scenario: Coin-cell–powered ECG patch with intermittent BLE transmission, requiring guaranteed reset on cold start and battery voltage sag. IC Role / Device Role / Timing Role: Monitors main 3.0V supply and forces active-high reset if voltage drops below 3.08V, holding reset for 140ms minimum after recovery to allow LDO re-stabilization. Use Value: Eliminates boot failures caused by marginal battery voltage, extending functional uptime without increasing PCB area or bill-of-materials. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: 12V-to-3.3V DC/DC converted supply in door module MCU, exposed to load-dump transients and cold-crank voltage dips. IC Role / Device Role / Timing Role: Detects VCC dip below 3.08V during cranking and asserts active-high RESET; maintains assertion for 140ms post-recovery to prevent MCU lockup. Use Value: Avoids firmware hang states during engine start by enforcing deterministic reset timing independent of supply ramp slope. |
Use Scenario: Dual-rail (3.3V + 1.8V) SoC power sequence in voice-controlled hub, where 3.3V rail powers PMIC and communication interfaces. IC Role / Device Role / Timing Role: Supervises 3.3V rail only; asserts active-high RESET during undervoltage, deasserting only after 140ms timeout - coordinating with PMIC sequencing logic. Use Value: Enables clean power-on handoff between PMIC and application processor without requiring additional GPIO supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326LTR31D3+ | Same 3.08V threshold and 140ms timeout, but in 6-pin µDFN-6 (L611-1); includes no-connect pins; identical electrical specs | Requires PCB redesign for 6-pin footprint; suitable when thermal dissipation or board-level test access demands larger package | Select MAX6326LTR31D3+ only if µDFN-6 mechanical robustness or automated optical inspection compatibility is prioritized over SC70-3 size savings |
| TPS3123E18DBVR | 3.08V threshold, 200ms timeout (not 140ms); 1.8V–5.5V range; 2.5µA ICC at 1.8V; SOT-23-3 package | Longer timeout may delay system boot unnecessarily; SOT-23-3 has larger footprint (2.92mm × 1.6mm) than SC70-3 (2.0mm × 2.1mm) | Choose TPS3123E18DBVR only if TI supply chain continuity or existing SOT-23-3 layout reuse outweighs exact 140ms timing match and size advantage of MAX6382XR31D3 |
Compared with MAX6326LTR31D3+, the MAX6382XR31D3 saves 45% board area in SC70-3 while delivering identical reset behavior; versus TPS3123E18DBVR, it provides tighter timeout control and smaller footprint, making it optimal for miniaturized, timing-critical embedded systems.
Availability
MAX6382XR31D3 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, and automotive body control units requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6382XR31D3 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 low-power, high-reliability solutions for harsh environments.
The MAX6381–MAX6390 family was engineered specifically for space- and power-constrained microprocessor supervision, delivering factory-trimmed thresholds, nanoscale leakage control, and guaranteed operation from –40°C to +125°C in miniature SC70 and µDFN packages.
FAQ
What is the exact reset threshold voltage of the MAX6382XR31D3?
The MAX6382XR31D3 has a factory-set reset threshold of 3.00V (minimum), 3.08V (nominal), and 3.15V (maximum) over the full operating temperature range of –40°C to +125°C. This corresponds to the "31" suffix in the part number and is trimmed during production to meet ±2.5% accuracy without external calibration.
Does the MAX6382XR31D3 support manual reset functionality?
No, the MAX6382XR31D3 does not include a manual reset (MR) input. It is a basic single-supply supervisory circuit with only VCC monitoring and active-high push-pull RESET output. Manual reset capability is present only in MAX6384–MAX6390 variants, which feature dedicated MR pins and internal pull-up resistors.
What is the guaranteed reset timeout period for the MAX6382XR31D3?
The MAX6382XR31D3 guarantees a minimum reset timeout period of 140ms after VCC rises above the 3.08V threshold. This value is fixed by internal capacitor-based timing and is specified as D3 in the part number; typical duration is 280ms, but design must rely on the 140ms minimum for timing-critical systems.
Can the MAX6382XR31D3 operate reliably at VCC = 1.2V?
Yes, the MAX6382XR31D3 guarantees correct reset output logic state down to VCC = 1.0V, including at 1.2V. Its internal comparator and push-pull driver remain functional, asserting active-high RESET when VCC falls below 3.08V and maintaining valid levels throughout the brownout - a key differentiator from many competing supervisors.
Is the MAX6382XR31D3 pin-compatible with the MAX809?
Yes, the MAX6382XR31D3 in SC70-3 package is pin-compatible with the MAX809 in SOT-23-3, sharing identical VCC–GND–RESET pinout order. However, MAX809 has active-low output and different threshold options; direct replacement requires verifying system-level logic polarity and timing requirements before substitution.
MAX6382XR31D3 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:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6382XR31D3 FAQ
1.How can I place an order for MAX6382XR31D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6382XR31D3 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 MAX6382XR31D3 reliable?
The price and inventory of MAX6382XR31D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6382XR31D3 is usually 5 days.
3.What payment methods are accepted for MAX6382XR31D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6382XR31D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6382XR31D3?
MAX6382XR31D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6382XR31D3 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 MAX6382XR31D3?
For technical support, including MAX6382XR31D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6382XR31D3 requirements.
6.How does Aetrix verify that MAX6382XR31D3 is sourced from the original manufacturer or authorized distributors?
All MAX6382XR31D3 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 MAX6382XR31D3 meets industry standards.
7.What is the process for return or replacement of MAX6382XR31D3?
All MAX6382XR31D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6382XR31D3, 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 MAX6382XR31D3 part is unused and in its original packaging.
Return procedure for MAX6382XR31D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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