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Analog Devices Inc./Maxim Integrated MAX6379UR44+T
- Part No.:
- MAX6379UR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6379UR44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
MAX6379UR44+T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector optimized for precision power-supply monitoring in battery-powered systems. It features a factory-trimmed 4.38V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC - enabling reliable brownout detection in portable medical devices and low-voltage microcontroller reset circuits.
For engineers reviewing the MAX6379UR44+T datasheet, MAX6379UR44+T pinout, MAX6379UR44+T application, or MAX6379UR44+T equivalent, key selection criteria include its active-high output logic, SOT23-3 package compatibility, 4.38V trip point with hysteresis, and immunity to sub-10µs VCC transients at typical overdrive levels.
Technical Context
The MAX6379UR44+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.38V threshold without external components. Its push-pull output drives high when VCC falls below VTH, eliminating need for external pull-up resistors.
Designed for single-function voltage supervision, it asserts output within 9.5µs (typical propagation delay) and rejects fast transients via internal filtering - validated by the Maximum Transient Duration vs. Threshold Overdrive curve showing immunity to ≤50µs glitches at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±2.5% over -40°C to +85°C - ensures accurate brownout detection across industrial temperature range |
| Supply Current | 500nA typical - extends battery life in always-on wearable sensors and IoT edge nodes |
| Output Type | Active-high push-pull - directly interfaces with MCU reset inputs without external pull-up |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and across multiple supply rails |
| Propagation Delay | 9.5µs typical (falling edge) - enables timely system reset before critical undervoltage conditions escalate |
| Hysteresis | 100mV - prevents output chatter during slow-ramping or noisy supply recovery |
| Tempco | 40ppm/°C - maintains threshold stability across wide ambient variations |
Pinout & Package
MAX6379UR44+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and suitable for high-density PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator - must be connected to system ground plane for stable threshold accuracy |
| 2 | OUT | Active-high push-pull output - sinks up to 1.2mA or sources up to 500µA; directly drives CMOS reset inputs |
| 3 | VCC | Supply input - powers internal circuitry and defines monitored rail; operates from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 500nA supply current | Enables multi-year battery life in coin-cell–powered remote sensors and asset trackers |
| Factory-trimmed 4.38V threshold | Eliminates manual calibration and external resistor networks for Li-ion battery end-of-discharge detection |
| Active-high push-pull output | Reduces BOM count by removing external pull-up resistors required by open-drain alternatives |
| 1V minimum VCC operation | Ensures valid reset assertion even during severe brownout events before system shutdown |
| Transient immunity | Rejects noise spikes ≤50µs duration at 100mV overdrive - prevents false resets in electrically noisy environments |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable reset if battery voltage drops below 4.3V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high reset signal to ARM Cortex-M0+ MCU upon undervoltage condition. Use Value: Prevents corrupted sensor data logging and firmware execution errors during battery depletion. |
Use Scenario: 24V DC-powered digital input module operating in factory automation with fluctuating supply due to motor switching. IC Role / Device Role / Timing Role: Monitors regulated 5V rail feeding FPGA configuration memory and I/O buffers. Use Value: Guarantees clean FPGA reconfiguration and prevents metastability in fieldbus communication interfaces. |
| Wearable Fitness Trackers | Smart Energy Meters |
Use Scenario: Bluetooth LE wristband using single-cell LiPo (4.2V–3.0V range), where 4.38V threshold detects early discharge onset. IC Role / Device Role / Timing Role: Active-high reset generator tied to system power management IC to initiate graceful shutdown sequence. Use Value: Preserves user session data and avoids flash memory corruption during low-battery state transitions. |
Use Scenario: ANSI C12.20-compliant meter with isolated 3.3V auxiliary supply derived from mains, subject to surges and sags. IC Role / Device Role / Timing Role: Supervises 3.3V rail powering metrology ADC and real-time clock. Use Value: Maintains timekeeping integrity and prevents erroneous kWh accumulation during AC line disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB33DBZR | 3.3V threshold, open-drain output, 1.8µA supply current | Requires external pull-up; higher quiescent current reduces battery lifetime | Select when 3.3V rail monitoring is needed and board space allows pull-up resistor |
| TPS3801K33DBVR | 3.3V threshold, active-low push-pull, 1.2µA supply current | Inverted logic requires MCU pin reassignment or inverter gate; not drop-in compatible | Choose only if existing firmware expects active-low reset and 3.3V trip is acceptable |
Compared with TLV803EB33DBZR and TPS3801K33DBVR, the MAX6379UR44+T provides a unique combination of 4.38V trip point, active-high logic, and 500nA current - making it irreplaceable for Li-ion end-of-life detection without layout or firmware changes.
Availability
MAX6379UR44+T is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, wearable fitness trackers, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6379UR44+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage supervision in portable and battery-critical systems - delivering precision thresholds, nanoscale current consumption, and robust transient immunity in minimal 3-pin packages.
FAQ
What is the exact reset threshold voltage of MAX6379UR44+T and how stable is it over temperature?
The MAX6379UR44+T has a factory-trimmed nominal reset threshold of 4.38V, with guaranteed accuracy of ±2.5% over the full -40°C to +85°C operating range. Its 40ppm/°C tempco ensures minimal drift across temperature extremes, making it suitable for applications like Li-ion battery end-of-discharge detection where threshold consistency is critical to system reliability.
Does MAX6379UR44+T require any external components to function?
No, the MAX6379UR44+T requires no external components - its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. This eliminates calibration steps and reduces BOM cost, especially compared to discrete supervisor solutions needing external resistors and capacitors.
What is the output behavior of MAX6379UR44+T during a power supply transient?
The MAX6379UR44+T ignores fast negative-going VCC transients up to 50µs in duration when the overdrive (VTH – VCC) is 100mV, as confirmed by its Typical Operating Characteristics graph. This built-in immunity prevents false resets in electrically noisy environments such as motor-driven industrial equipment or switch-mode power supply outputs.
Can MAX6379UR44+T operate reliably at very low supply voltages?
Yes, the MAX6379UR44+T guarantees correct output logic state down to 1V VCC, and functions across a 1.2V to 5.5V supply range. This enables robust brownout detection even during deep undervoltage conditions - essential for graceful shutdown in battery-powered systems approaching exhaustion.
Is MAX6379UR44+T pin-compatible with other devices in the MAX6375–MAX6380 family?
Yes, all MAX6375–MAX6380 variants - including MAX6379UR44+T - share identical 3-pin SOT23-3 and SC70-3 footprints and pinouts (GND, OUT, VCC). This allows direct substitution within the same package type when changing threshold or output logic configuration, simplifying design reuse and inventory management.
MAX6379UR44+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6379UR44+T FAQ
1.How can I place an order for MAX6379UR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379UR44+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 MAX6379UR44+T reliable?
The price and inventory of MAX6379UR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379UR44+T is usually 5 days.
3.What payment methods are accepted for MAX6379UR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379UR44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379UR44+T?
MAX6379UR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379UR44+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 MAX6379UR44+T?
For technical support, including MAX6379UR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379UR44+T requirements.
6.How does Aetrix verify that MAX6379UR44+T is sourced from the original manufacturer or authorized distributors?
All MAX6379UR44+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 MAX6379UR44+T meets industry standards.
7.What is the process for return or replacement of MAX6379UR44+T?
All MAX6379UR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379UR44+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 MAX6379UR44+T part is unused and in its original packaging.
Return procedure for MAX6379UR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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