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Analog Devices Inc./Maxim Integrated MAX6379UR46
- Part No.:
- MAX6379UR46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6379UR46.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:2,113
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Product details
Overview
MAX6379UR46 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 4.63V 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, enabling reliable reset or power-fail signaling in portable medical devices and low-power IoT sensors.
For engineers reviewing the MAX6379UR46 datasheet, MAX6379UR46 pinout, MAX6379UR46 application, or MAX6379UR46 equivalent, key selection criteria include its 4.63V trip point, active-high push-pull output configuration, SC70-3/SOT23-3 package compatibility, transient immunity up to 100µs at 10mV overdrive, and guaranteed 1V minimum operating voltage.
Technical Context
The MAX6379UR46 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.63V detection threshold. Its active-high push-pull output drives high when VCC drops below VTH, eliminating external pull-up components required by open-drain alternatives.
It incorporates built-in hysteresis (9.5mV typical) and rejects fast transients-capable of ignoring negative-going VCC glitches up to 100µs wide when overdriven by 10mV-ensuring stable reset assertion without false triggering in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.63V nominal, ±2.5% accuracy over -40°C to +85°C - ensures precise brown-out detection for 5V-regulated systems. |
| Supply Current | 500nA typical - enables multi-year battery life in coin-cell–powered devices like wearables and remote sensors. |
| Output Type | Active-high push-pull - directly interfaces with microcontroller reset inputs without external pull-up resistors. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brown-out and across wide input voltage rails. |
| Propagation Delay | 9.5µs typical (falling edge) - provides fast, deterministic response to supply collapse for critical system recovery. |
| Hysteresis | 9.5mV typical - prevents output oscillation near threshold during slow-ramping or noisy supply conditions. |
| Tempco | 40ppm/°C - maintains tight threshold stability across industrial temperature range. |
Pinout & Package
MAX6379UR46 is available in both 3-pin SOT23-3 and SC70-3 packages. Both share identical pin numbering and terminal functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT23) / 2 (SC70) | OUT | Active-high push-pull output - drives high when VCC < VTH; sinks 3.2mA / sources 500µA; no external pull-up needed. |
| 2 (SOT23) / 1 (SC70) | GND | Ground reference - must be connected to system ground plane for accurate threshold referencing and noise immunity. |
| 3 (both) | VCC | Supply input - monitors this rail; operates from 1.2V to 5.5V; internal circuitry remains functional down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year battery life in 220mAh coin-cell applications with daily wake-up cycles. |
| Factory-trimmed precision threshold | 4.63V ±2.5% eliminates manual calibration and reduces BOM count versus resistor-based solutions. |
| Transient-immune detection | Rejects VCC glitches ≤100µs at 10mV overdrive - prevents spurious resets in motor-driven or RF-switching systems. |
| Guaranteed 1V operation | Ensures valid output state even during severe brown-out, supporting fail-safe shutdown sequencing. |
| No external components required | Integrates reference, comparator, and trimming - reduces PCB area by ≥2mm² vs. discrete supervisor circuits. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 battery with 3.3V LDO output. IC Role / Device Role / Timing Role: Voltage supervisor asserting MCU reset when LDO output drops below 4.63V due to battery depletion or load surge. Use Value: Prevents corrupted sensor data logging by ensuring clean, early-reset before supply collapse compromises ADC or memory integrity. |
Use Scenario: DIN-rail mounted analog input module operating from 24VDC supply with local 5V regulation. IC Role / Device Role / Timing Role: Monitoring 5V rail for undervoltage; triggers watchdog timeout if supply sags during EMI events. Use Value: Enables deterministic fieldbus communication recovery after transient dips, meeting IEC 61000-4-4 compliance requirements. |
| Smart Utility Meters | Wireless Sensor Nodes |
|
Use Scenario: AMI meter with dual-supply architecture (3.3V MCU + 1.8V RF IC) fed from single buck converter. IC Role / Device Role / Timing Role: Detecting 5V intermediate rail collapse to initiate graceful shutdown and EEPROM save before power loss. Use Value: Guarantees non-volatile memory write completion within 9.5µs detection latency, preventing firmware corruption. |
Use Scenario: LoRaWAN node using AA batteries and boost converter delivering regulated 3.3V to MCU and transceiver. IC Role / Device Role / Timing Role: Supervising boosted rail to detect end-of-life battery voltage decay before RF transmission fails. Use Value: Triggers low-battery alert transmission while sufficient energy remains, improving predictive maintenance accuracy. |
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 - higher IQ and lower trip point. | Requires external pull-up; suited for 3.3V logic domains where 4.63V detection is unnecessary. | Select only if system uses 3.3V supply monitoring and can accommodate higher current draw. |
| TPS3808G33DBVR | 3.3V threshold, push-pull output, 1.1µA supply current - 2200× higher IQ than MAX6379UR46. | Designed for higher-current industrial rails; lacks sub-µA optimization for battery longevity. | Prefer when board space allows larger SOT23-5 and system prioritizes timing accuracy over battery life. |
Compared with TLV803EB33DBZR and TPS3808G33DBVR, the MAX6379UR46 uniquely delivers 4.63V detection with sub-µA quiescent current and active-high push-pull drive - making it irreplaceable for long-life, 5V-system brown-out protection where external components and power budget are constrained.
Availability
MAX6379UR46 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial PLC I/O modules, and wireless sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6379UR46 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 connectivity applications, with emphasis on reliability and integration.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in space-constrained, battery-operated systems - delivering factory-trimmed accuracy without external components.
FAQ
What is the exact factory-trimmed threshold voltage of the MAX6379UR46?
The MAX6379UR46 has a nominal threshold voltage of 4.63V, with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is laser-trimmed at wafer test and confirmed in the Electrical Characteristics table under "Voltage Threshold" with min/typ/max columns showing 4.514V/4.630V/4.746V at temperature extremes.
Does the MAX6379UR46 require external components to operate?
No, the MAX6379UR46 requires no external components. It integrates a precision bandgap reference, comparator, and factory-trimmed resistor network - enabling complete voltage supervision functionality in a 3-pin package. Unlike open-drain supervisors, its active-high push-pull output eliminates the need for an external pull-up resistor.
What is the minimum VCC voltage at which the MAX6379UR46 guarantees correct output logic state?
The MAX6379UR46 guarantees correct output logic state (high when VCC < VTH, low when VCC ≥ VTH) down to 1V VCC. This is explicitly stated in the General Description and verified across the full operating temperature range, enabling robust operation during deep brown-out conditions.
How does the MAX6379UR46 handle fast supply transients?
The MAX6379UR46 ignores fast negative-going VCC transients up to 100µs wide when the overdrive (VTH – VCC) is 10mV, as shown in Figure MAX6375-04. This built-in transient immunity prevents false resets caused by switching noise, motor commutation spikes, or RF coupling onto the supply rail.
Which package options are available for the MAX6379UR46, and are they pin-compatible?
The MAX6379UR46 is offered in both 3-pin SOT23-3 and SC70-3 packages. They are electrically identical and pin-compatible: Pin 1 (SOT23) = GND, Pin 2 (SOT23) = OUT, Pin 3 = VCC; Pin 1 (SC70) = OUT, Pin 2 = GND, Pin 3 = VCC - matching the top-view diagrams in the datasheet.
MAX6379UR46 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:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6379UR46 FAQ
1.How can I place an order for MAX6379UR46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379UR46 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 MAX6379UR46 reliable?
The price and inventory of MAX6379UR46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379UR46 is usually 5 days.
3.What payment methods are accepted for MAX6379UR46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379UR46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379UR46?
MAX6379UR46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379UR46 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 MAX6379UR46?
For technical support, including MAX6379UR46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379UR46 requirements.
6.How does Aetrix verify that MAX6379UR46 is sourced from the original manufacturer or authorized distributors?
All MAX6379UR46 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 MAX6379UR46 meets industry standards.
7.What is the process for return or replacement of MAX6379UR46?
All MAX6379UR46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379UR46, 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 MAX6379UR46 part is unused and in its original packaging.
Return procedure for MAX6379UR46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6379UR46 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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