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Analog Devices Inc./Maxim Integrated MAX6382XR44D5
- Part No.:
- MAX6382XR44D5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6382XR44D5.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,775
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Product details
Overview
The MAX6382XR44D5 from Maxim Integrated is a single-supply, active-high push-pull microprocessor supervisory circuit with factory-set 4.38V reset threshold and 280ms minimum reset timeout. It monitors VCC in low-power systems (1.0V–5.5V), consumes only 3µA at 1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment to prevent code execution during brownout.
For engineers reviewing the MAX6382XR44D5 datasheet, MAX6382XR44D5 pinout, MAX6382XR44D5 application, or MAX6382XR44D5 equivalent, key selection criteria include its active-high push-pull output logic, ±2.5% threshold accuracy over –40°C to +125°C, immunity to negative-going VCC transients, SC70-3 package footprint, and compatibility with 1.8V–5.0V µP supply rails.
Technical Context
The MAX6382XR44D5 implements a precision bandgap-based voltage comparator with internal 1.27V reference for threshold detection and a temperature-compensated RC timer for reset timeout generation. Its reset assertion is triggered solely by VCC falling below 4.38V (±2.5%), with no auxiliary RESET IN input or manual reset (MR) functionality - distinguishing it from MAX6384/MAX6385/MAX6390 variants.
It features a push-pull output stage capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC, and sinking 3.2mA with VOL ≤ 0.4V. The device operates across the full industrial temperature range (–40°C to +125°C) with 60ppm/°C reset threshold tempco and guaranteed functionality down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±2.5% - sets precise brownout detection point for 4.5V nominal supplies |
| Reset Timeout | 280ms min - ensures µP remains held in reset long enough for stable power rail recovery |
| 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 assertion even during deep brownout or partial power loss |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor; drives µP RESET pin directly |
| Threshold Tempco | 60ppm/°C - maintains <±30mV drift over full –40°C to +125°C range |
| VCC to Reset Delay | 35µs - fast response to rapid supply collapse, critical for real-time control systems |
Pinout & Package
MAX6382XR44D5 is housed in a 3-pin SC70-3 package (package code X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and lead-free finish. Pin 1 = RESET (active-high push-pull), Pin 2 = VCC, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | RESET | Active-high push-pull output; asserts high when VCC < 4.38V; deasserts low after 280ms timeout |
| Pin 2 | VCC | Main supply input and monitored voltage rail; powers internal circuitry and defines reset threshold reference |
| Pin 3 | GND | Analog/digital ground reference; must be low-impedance connection to avoid false resets |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed threshold | 4.38V with ±2.5% tolerance over –40°C to +125°C - eliminates external resistor divider calibration |
| Ultra-low quiescent current | 3µA at 1.8V - extends battery life in always-on monitoring nodes without sacrificing reliability |
| Guaranteed operation down to VCC = 1V | Valid RESET output state maintained even during severe brownout - prevents undefined µP behavior |
| Negative-going transient immunity | Rejects sub-100µs glitches below threshold - avoids spurious resets in electrically noisy environments |
| Push-pull output drive | Sources 800µA / sinks 3.2mA - directly interfaces with standard CMOS µP RESET inputs without pull resistors |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG monitor powered by CR2032 coin cell with 2.0–3.0V discharge profile. IC Role / Device Role / Timing Role: Supervises VCC to assert RESET during battery sag below 2.5V, holding µP in reset until voltage recovers above 4.38V × (VCC scaling factor) and 280ms timeout expires. Use Value: Prevents corrupted memory writes and firmware crashes during intermittent low-battery operation, extending usable sensor runtime. |
Use Scenario: DIN-rail mounted analog input module operating from 24VDC converted to 3.3V via LDO. IC Role / Device Role / Timing Role: Monitors 3.3V rail for undervoltage events caused by load surges or LDO dropout; asserts active-high RESET to halt ADC sampling and communication stack. Use Value: Ensures deterministic system restart after power anomaly, eliminating watchdog timeouts and field-replaceable unit failures. |
| Smart Meter Battery Backup | Automotive Body Control Module |
Use Scenario: Electricity meter with supercapacitor backup sustaining RTC and metrology during AC mains outage. IC Role / Device Role / Timing Role: Tracks supercapacitor voltage decay; triggers 280ms reset pulse when decaying 3.3V rail crosses 4.38V threshold to initiate graceful shutdown sequence. Use Value: Guarantees EEPROM write completion and nonvolatile register save before power loss, preserving billing integrity. |
Use Scenario: BCM microcontroller supplied from vehicle battery (9–16V) via 5.0V LDO, subject to cranking dips to 6V. IC Role / Device Role / Timing Role: Detects 5.0V rail collapse during engine start; holds µP in reset until post-cranking stabilization and 280ms debounce period elapses. Use Value: Eliminates CAN bus error frames and relay chatter caused by marginal µP operation during cold-cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR44D5 | Same 4.38V threshold and 280ms timeout, but active-low open-drain output requiring external pull-up | Requires PCB layout change for pull-up resistor; incompatible with µP RESET pins expecting active-high logic | Select only if legacy design uses open-drain topology and board revision allows pull-up addition |
| TLV803EB43DBZR | 4.3V threshold (±1%), 200ms timeout, 0.5µA IQ at 1.8V, SOT-23-3 package | Lower IQ and tighter threshold tolerance, but lacks guaranteed operation below 1.6V and has shorter timeout | Prefer for ultra-low-power applications where 200ms reset hold time suffices and VCC never drops below 1.6V |
Compared with MAX6382XR44D5, MAX6326XR44D5 requires external biasing and changes reset polarity, while TLV803EB43DBZR offers lower power but reduced brownout margin and shorter timeout - making MAX6382XR44D5 optimal for robust 280ms hold time and 1.0V operational floor.
Availability
MAX6382XR44D5 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6382XR44D5 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 in harsh environments.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy µP supervisory circuits optimized for battery-powered, automotive, and industrial systems demanding reliable reset under brownout and transient conditions.
FAQ
What is the exact reset threshold voltage of the MAX6382XR44D5?
The MAX6382XR44D5 has a factory-set reset threshold of 4.38V, with ±2.5% accuracy over the full –40°C to +125°C temperature range. This value is fixed and unadjustable, corresponding to the "44" suffix in the part number per Maxim's Reset Threshold table. The MAX6382XR44D5 does not support user-programmable or resistor-divider–based threshold adjustment.
Does the MAX6382XR44D5 include a manual reset (MR) input?
No, the MAX6382XR44D5 does not feature a manual reset input. According to the Selector Guide and Pin Description, MR functionality is exclusive to MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6382XR44D5 is a 3-pin SC70 device with only RESET, VCC, and GND terminals - no MR pin is present or internally implemented.
What is the minimum VCC voltage at which the MAX6382XR44D5 guarantees correct RESET output logic state?
The MAX6382XR44D5 guarantees valid RESET output state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Detailed Description sections. Below this level, the internal comparator and output driver may become indeterminate. This 1.0V operational floor makes the MAX6382XR44D5 suitable for deep brownout detection in systems with weak or decaying power sources.
Can the MAX6382XR44D5 be used in place of the MAX809?
Yes, the MAX6382XR44D5 is explicitly listed as pin-compatible with the MAX809 in the Features section. Both are 3-pin SC70 devices with active-high reset outputs and similar timing characteristics. However, the MAX6382XR44D5 offers superior threshold accuracy (±2.5% vs. ±3.5% typical for MAX809), lower supply current (3µA vs. ~15µA), and guaranteed operation down to 1.0V - making it a functional and performance upgrade replacement.
What package type and dimensions does the MAX6382XR44D5 use?
The MAX6382XR44D5 uses the SC70-3 package (package code X3-2), with overall dimensions of 2.0mm × 2.1mm × 0.95mm and gull-wing surface-mount leads. It is lead-free and RoHS-compliant. This compact footprint matches industry-standard 3-pin SC70 footprints, enabling drop-in replacement in space-constrained designs such as wearables and sensor nodes.
MAX6382XR44D5 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:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6382XR44D5 FAQ
1.How can I place an order for MAX6382XR44D5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6382XR44D5 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 MAX6382XR44D5 reliable?
The price and inventory of MAX6382XR44D5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6382XR44D5 is usually 5 days.
3.What payment methods are accepted for MAX6382XR44D5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6382XR44D5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6382XR44D5?
MAX6382XR44D5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6382XR44D5 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 MAX6382XR44D5?
For technical support, including MAX6382XR44D5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6382XR44D5 requirements.
6.How does Aetrix verify that MAX6382XR44D5 is sourced from the original manufacturer or authorized distributors?
All MAX6382XR44D5 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 MAX6382XR44D5 meets industry standards.
7.What is the process for return or replacement of MAX6382XR44D5?
All MAX6382XR44D5 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6382XR44D5, 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 MAX6382XR44D5 part is unused and in its original packaging.
Return procedure for MAX6382XR44D5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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