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Analog Devices Inc./Maxim Integrated MAX6379XR44+T
- Part No.:
- MAX6379XR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6379XR44+T.pdf
- Description:
- IC VOLT DETECT LP 4.38V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,308
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Product details
Overview
MAX6379XR44+T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector designed for precision 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. It asserts a logic-high output when VCC falls below threshold and is used in portable equipment power sequencing and Li+-battery undervoltage protection.
For engineers reviewing the MAX6379XR44+T datasheet, MAX6379XR44+T pinout, MAX6379XR44+T application, or MAX6379XR44+T equivalent, this page delivers verified electrical parameters, SC70-3 package details, active-high push-pull behavior, transient immunity specs, and two validated alternative parts for supply monitoring designs requiring sub-1µA quiescent current and ±2.5% threshold accuracy.
Technical Context
The MAX6379XR44+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.38V detection threshold. Its active-high push-pull output drives high (VOH ≥ 0.8×VCC) when VCC drops below VTH and low (VOL ≤ 0.4V at 1.2mA sink) otherwise, eliminating external pull-up components.
It ignores fast negative-going VCC transients up to 140µs at 20mV overdrive, per the Maximum Transient Duration vs. Threshold Overdrive curve. The device operates across -40°C to +85°C with 40ppm/°C voltage threshold tempco and requires no external calibration or trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.38V nominal, ±2.5% over -40°C to +85°C - ensures reliable reset assertion across industrial temperature range without recalibration |
| Supply Current | 500nA typical at +25°C - enables multi-year battery life in coin-cell–powered devices like IoT sensors and wearables |
| Output Type | Active-high push-pull - provides rail-to-rail logic-level output without external pull-up, simplifying interface to µP reset inputs |
| VCC Operating Range | 1.2V to 5.5V - supports operation during brownout and deep discharge, with valid output state guaranteed down to 1V |
| Propagation Delay | 9.5µs typical (falling edge) - enables fast response to supply faults while rejecting sub-10µs noise spikes |
| Hysteresis | 100mV - prevents output oscillation during slow VCC recovery near threshold |
| Tempco | 40ppm/°C - limits threshold drift to <±15mV over full temperature range, critical for accurate battery end-of-life detection |
Pinout & Package
MAX6379XR44+T is housed in a lead-free 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable PCBs. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC - compatible with standard SC70 pick-and-place tooling and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator - must be connected directly to low-impedance system ground plane |
| 2 | OUT | Active-high push-pull output - sources up to 500µA and sinks up to 1.2mA; drives microcontroller reset pins directly |
| 3 | VCC | Supply input - powers internal circuitry; accepts 1.2V–5.5V; output remains valid down to 1V VCC |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 500nA supply current | Extends shelf life and runtime of primary battery systems (e.g., CR2032) by minimizing standby drain |
| Factory-trimmed 4.38V threshold | Eliminates production calibration; meets ±2.5% accuracy spec without external resistor networks |
| Active-high push-pull output | Directly interfaces to standard µP reset inputs without pull-up resistors or level shifters |
| 1V minimum operating voltage | Ensures deterministic reset assertion even during severe battery depletion or cold-start conditions |
| Transient immunity (≤140µs glitch rejection) | Prevents false resets caused by switching noise, ESD events, or DC/DC converter ripple |
Applications
| Portable Medical Sensors | Industrial Telemetry Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 battery, requiring precise low-voltage shutdown before sensor accuracy degrades. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset to MCU when battery drops below 4.38V, triggering graceful data save and sleep. Use Value: Prevents corrupted memory writes and false readings by ensuring MCU halts operation before supply falls below ADC reference stability threshold. |
Use Scenario: Remote pressure sensor node in oil-field pipeline monitoring, operating on lithium-thionyl chloride battery for 10+ years. IC Role / Device Role / Timing Role: Supervisory IC monitoring regulated 3.3V rail derived from primary battery; asserts reset if regulator fails or battery depletes. Use Value: Guarantees fail-safe shutdown before communication ICs transmit invalid data due to marginal supply voltage. |
| Wearable Fitness Trackers | Smart Meter Backup Power |
|
Use Scenario: Bluetooth-enabled wristband using rechargeable Li-ion; needs accurate end-of-discharge detection to preserve charge cycle count. IC Role / Device Role / Timing Role: Battery voltage supervisor with 4.38V threshold triggers controlled shutdown before cell voltage enters damaging <3.0V zone. Use Value: Extends battery service life by avoiding deep discharge, enabled by ±2.5% threshold accuracy over temperature and aging. |
Use Scenario: Electricity meter with supercapacitor backup; detects main supply failure and initiates switchover to backup within 10µs. IC Role / Device Role / Timing Role: Fast-propagation (9.5µs) voltage detector monitoring 5V system rail to initiate capacitor discharge control logic. Use Value: Meets IEC 62053-21 requirement for uninterrupted timekeeping during AC loss by enabling sub-10µs fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809K33DBZR | 3.3V fixed threshold, 1.8µA supply current, SOT23-3 package | Higher quiescent current limits use in >5-year battery applications; lower threshold suits 3.3V rail monitoring only | Select when 3.3V detection suffices and board already uses TI-qualified SOT23 footprints |
| APX803S-43SA-7 | 4.3V threshold (±2%), 1.1µA supply current, SOT23-3, open-drain output | Requires external pull-up; higher ICC reduces battery life vs. MAX6379XR44+T's 500nA; 0.1V lower threshold shifts trip point | Choose for cost-sensitive designs where open-drain flexibility (e.g., wired-OR reset buses) outweighs 2.2× higher supply current |
Compared with TLV809K33DBZR and APX803S-43SA-7, the MAX6379XR44+T delivers the lowest supply current (500nA), tightest threshold tolerance (±2.5%), and push-pull output - making it optimal for long-life, space-constrained, single-rail battery systems needing deterministic reset without external components.
Availability
MAX6379XR44+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial telemetry nodes, wearable fitness trackers, smart meter backup power, and battery-powered IoT edge devices requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6379XR44+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 supply monitoring in battery-critical applications, delivering precision voltage detection with minimal footprint and zero external components.
FAQ
What is the exact factory-trimmed threshold voltage of the MAX6379XR44+T?
MAX6379XR44+T has a nominal threshold voltage of 4.38V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is laser-trimmed at wafer test and confirmed in Table 1 of the datasheet under suffix "R44". The device maintains valid output logic state down to 1V VCC, ensuring reliability during deep battery discharge.
Does the MAX6379XR44+T require external components for basic operation?
No, the MAX6379XR44+T requires no external components for core voltage detection functionality. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Only VCC, GND, and the load on the push-pull OUT pin need connection - no pull-up resistors, capacitors, or trimming networks are necessary.
What is the maximum transient duration the MAX6379XR44+T can reject at 20mV overdrive?
At 20mV threshold overdrive (i.e., VCC = VTH − 20mV), the MAX6379XR44+T rejects transients up to 140µs in duration, as shown in Figure MAX6375-04 of the datasheet. This immunity prevents false resets from short-duration supply glitches common in DC/DC converter outputs or noisy PCB environments.
Which package does the MAX6379XR44+T use, and is it RoHS-compliant?
MAX6379XR44+T uses the 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm) and is supplied in lead-free, RoHS-compliant form - indicated by the "+T" suffix. The SC70 footprint is compatible with automated assembly and offers superior thermal performance versus SOT23-3 for the same pin count.
How does the active-high push-pull output of the MAX6379XR44+T differ from open-drain alternatives?
The MAX6379XR44+T's active-high push-pull output actively drives both high (VOH ≥ 0.8×VCC) and low (VOL ≤ 0.4V at 1.2mA), eliminating the need for external pull-up resistors. In contrast, open-drain detectors like MAX6380 require a pull-up to define the high state - adding component count, leakage paths, and timing uncertainty that the MAX6379XR44+T avoids by design.
MAX6379XR44+T 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:
- 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:
- SC-70-3
MAX6379XR44+T FAQ
1.How can I place an order for MAX6379XR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379XR44+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 MAX6379XR44+T reliable?
The price and inventory of MAX6379XR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379XR44+T is usually 5 days.
3.What payment methods are accepted for MAX6379XR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379XR44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379XR44+T?
MAX6379XR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379XR44+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 MAX6379XR44+T?
For technical support, including MAX6379XR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379XR44+T requirements.
6.How does Aetrix verify that MAX6379XR44+T is sourced from the original manufacturer or authorized distributors?
All MAX6379XR44+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 MAX6379XR44+T meets industry standards.
7.What is the process for return or replacement of MAX6379XR44+T?
All MAX6379XR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379XR44+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 MAX6379XR44+T part is unused and in its original packaging.
Return procedure for MAX6379XR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6379XR44+T Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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