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Analog Devices Inc./Maxim Integrated MAX6382XR44D3+T
- Part No.:
- MAX6382XR44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6382XR44D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
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Product details
Overview
MAX6382XR44D3+T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit designed for reliable power-on reset and brownout detection in low-voltage systems. It features a factory-set 4.38V reset threshold (±2.5% over –40°C to +125°C), 140ms minimum reset timeout, 3μA supply current at +1.8V, and guaranteed valid reset output down to VCC = 1V. It is used in portable battery-powered equipment requiring stable, low-power reset assertion during voltage transients.
For engineers reviewing the MAX6382XR44D3+T datasheet, MAX6382XR44D3+T pinout, MAX6382XR44D3+T application, or MAX6382XR44D3+T equivalent, key selection criteria include its active-high push-pull output configuration, SC70-3 package footprint, 4.38V threshold tolerance, 140ms timeout timing, and compatibility with 1.8V–5.5V supply rails in space-constrained embedded designs.
Technical Context
The MAX6382XR44D3+T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed internal reference, with hysteresis and temperature-compensated threshold accuracy. Its internal timer generates a deterministic 140ms (min) reset pulse after VCC rises above 4.38V, independent of supply ramp rate.
This device operates as a single-supply reset monitor with no auxiliary inputs or manual reset-unlike MAX6384/MAX6390 variants-and asserts RESET high only when VCC falls below threshold or during power-up sequencing. Its push-pull output drives directly into μP reset inputs without external pullup components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (4.27V–4.48V range), ±2.5% over –40°C to +125°C - ensures consistent reset assertion across automotive and industrial temperature extremes. |
| Reset Timeout | 140ms minimum - guarantees sufficient hold time for microprocessor initialization before release. |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables. |
| Operating Voltage | 1.0V to 5.5V - supports valid reset state down to 1V and interoperability with 1.8V/2.5V/3.3V/5V logic domains. |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and provides rail-to-rail drive capability. |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during deep brownout conditions. |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint ideal for ultra-compact PCB layouts. |
Pinout & Package
MAX6382XR44D3+T is housed in a RoHS-compliant 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with 0.65mm pitch and exposed pad not connected internally.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; drives high during reset assertion, low otherwise; compatible with standard μP reset inputs requiring active-high enable. |
| 2 | VCC | Main supply input (1.0V–5.5V); also monitored for reset threshold violation; powers internal comparator and timer. |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±2.5% accuracy over full temperature range - eliminates need for external resistor dividers or calibration. |
| Negative-going VCC transient immunity | Rejects sub-10µs glitches up to 100mV below threshold - prevents spurious resets in noisy power environments. |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on edge nodes without compromising supervision reliability. |
| Valid reset output at low VCC | Operates down to VCC = 1V - ensures robust reset signaling during deep undervoltage events before shutdown. |
| SC70-3 footprint compatibility | Pin-compatible with legacy MAX809/MAX810 series - allows drop-in replacement in existing 3-pin supervisory designs. |
Applications
| Portable Medical Sensors | Battery-Powered IoT Endpoints |
|---|---|
|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts active-high RESET for 140ms on any dip below 4.38V to prevent firmware corruption during battery sag. Use Value: 3μA supply current extends operational life beyond 2 years; SC70-3 size fits within 8mm × 8mm PCB area budget. |
Use Scenario: Smart agriculture node powered by Li-SOCl₂ primary cell, sampling soil moisture every 15 minutes. IC Role / Device Role / Timing Role: Supervises 3.3V system rail; guarantees clean processor restart after cold-start or load-switching transients. Use Value: 4.38V threshold matches typical 3.3V LDO dropout margin; push-pull output eliminates pullup resistor, saving BOM cost and board space. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
|
Use Scenario: DIN-rail mounted sensor interface module with 24V-to-3.3V conversion and isolated CAN communication. IC Role / Device Role / Timing Role: Provides fail-safe reset to ARM Cortex-M4 core during 3.3V rail instability caused by EMI or thermal derating. Use Value: ±2.5% threshold accuracy over –40°C to +125°C ensures consistent behavior across ambient extremes without recalibration. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using AEC-Q100 qualified components. IC Role / Device Role / Timing Role: Resets microcontroller on battery voltage sags below 4.38V during engine cranking or alternator fault. Use Value: Valid reset output down to VCC = 1V prevents latch-up during severe brownout; RoHS-compliant SC70 package meets automotive material requirements. |
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 | 4.63V reset threshold, 240ms timeout, same SC70-3 package and active-high push-pull output. | Suitable where higher threshold and longer timeout align with 5V system brownout margins. | Select when system requires tighter 5V rail supervision and longer reset hold time than MAX6382XR44D3+T provides. |
| TLV803EB33DBZR | 3.3V reset threshold, 140ms timeout, SOT-23-3 package, active-low open-drain output. | Requires external pullup; suited for 3.3V-only systems needing lower threshold and industry-standard footprint. | Choose for cost-sensitive 3.3V applications where active-low signaling and SOT-23 compatibility are prioritized over ultra-low current. |
Compared with MAX809TRD3+T and TLV803EB33DBZR, the MAX6382XR44D3+T uniquely balances 4.38V threshold precision, 140ms timing, sub-μA quiescent current, and active-high push-pull drive in a miniature SC70-3 package-making it optimal for compact, battery-critical 3.3V/5V hybrid systems requiring minimal external components.
Availability
MAX6382XR44D3+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT endpoints, industrial PLC I/O modules, and automotive body control units requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6382XR44D3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 family was designed specifically for low-power, precision voltage supervision in space- and energy-constrained embedded systems-emphasizing factory-trimmed thresholds, wide temperature operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MAX6382XR44D3+T?
The MAX6382XR44D3+T has a nominal reset threshold of 4.38V, with a guaranteed range of 4.27V to 4.48V at +25°C and ±2.5% variation over –40°C to +125°C. This value is factory-trimmed and does not require external calibration. The "44" suffix in MAX6382XR44D3+T directly references this 4.38V threshold per Maxim's ordering guide.
Does MAX6382XR44D3+T include a manual reset input (MR)?
No, MAX6382XR44D3+T does not feature a manual reset input. It is a basic single-supply supervisory circuit with only VCC monitoring. Manual reset capability is present only in MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6382XR44D3+T pinout contains only RESET, VCC, and GND terminals - no MR or RESET IN pins.
What is the function of the RESET pin on MAX6382XR44D3+T?
The RESET pin on MAX6382XR44D3+T is an active-high push-pull output. It drives high whenever VCC falls below 4.38V or during power-up until VCC exceeds the threshold and the 140ms timeout expires. It drives low otherwise. This eliminates the need for an external pullup resistor and ensures fast, rail-to-rail transitions compatible with most microprocessor reset inputs.
Can MAX6382XR44D3+T operate from a 1.8V supply?
Yes, MAX6382XR44D3+T operates from 1.0V to 5.5V and draws only 3μA at +1.8V. Its reset output remains valid and correctly asserted even as VCC drops to 1V, making it suitable for ultra-low-voltage applications such as energy-harvesting sensors and coin-cell–powered devices where supply rails may sag significantly.
Is MAX6382XR44D3+T pin-compatible with older Maxim reset ICs?
Yes, MAX6382XR44D3+T uses the same 3-pin SC70 package and pinout as MAX809/MAX810 series devices. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC, and Pin 3 is GND - enabling direct replacement in legacy designs without PCB layout changes, provided the 4.38V threshold and 140ms timeout meet system requirements.
MAX6382XR44D3+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:
- 4.38V
- 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
MAX6382XR44D3+T FAQ
1.How can I place an order for MAX6382XR44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6382XR44D3+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 MAX6382XR44D3+T reliable?
The price and inventory of MAX6382XR44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6382XR44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6382XR44D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6382XR44D3+T transactions.
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4.How is shipping managed for MAX6382XR44D3+T?
MAX6382XR44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6382XR44D3+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 MAX6382XR44D3+T?
For technical support, including MAX6382XR44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6382XR44D3+T requirements.
6.How does Aetrix verify that MAX6382XR44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6382XR44D3+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 MAX6382XR44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6382XR44D3+T?
All MAX6382XR44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6382XR44D3+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 MAX6382XR44D3+T part is unused and in its original packaging.
Return procedure for MAX6382XR44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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