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Analog Devices Inc./Maxim Integrated MAX6379UR46-T
- Part No.:
- MAX6379UR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6379UR46-T.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:19,764
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Product details
Overview
MAX6379UR46-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 4.63V 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 and is used in portable equipment power sequencing and Li+-battery voltage supervision.
For engineers reviewing the MAX6379UR46-T datasheet, MAX6379UR46-T pinout, MAX6379UR46-T application, or MAX6379UR46-T equivalent, key selection criteria include its 4.63V trip point, active-high push-pull output, SC70/SOT23-3 package compatibility, and immunity to sub-10µs VCC transients at 100mV overdrive.
Technical Context
The MAX6379UR46-T 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 (VOH ≥ 0.8×VCC) when VCC drops below VTH and low (VOL ≤ 0.4V) otherwise, eliminating external pull-up components.
It operates across -40°C to +85°C with ±2.5% threshold accuracy and 40ppm/°C tempco. Propagation delay is 9.5µs (typical) for rising/falling edges, and it rejects fast VCC transients-e.g., up to ~120µs at 100mV overdrive-ensuring glitch-free reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-trimmed, ±2.5% over -40°C to +85°C) |
| Supply Current | 500nA (enables multi-year battery life in coin-cell applications) |
| Output Type | Active-high push-pull (no external pull-up required; drives high during fault) |
| VCC Operating Range | 1.2V to 5.5V (guaranteed correct logic state down to 1V) |
| Propagation Delay | 9.5µs (ensures timely system reset without excessive latency) |
| Threshold Hysteresis | 100mV (prevents chatter near trip point during slow VCC recovery) |
| Tempco | 40ppm/°C (maintains stable trip point across industrial temperature range) |
Pinout & Package
MAX6379UR46-T is packaged in a 3-pin SOT23-3 (lead-free, tape-and-reel). Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC. The SC70-3 variant uses identical pinout but smaller footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator; must be low-impedance return path |
| 2 | OUT | Active-high push-pull output; drives high when VCC < 4.63V; sinks/source capability supports direct µP reset input |
| 3 | VCC | Supply input; powers internal circuitry and defines detection domain; accepts 1.2V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year operation on CR2032 coin cell in standby |
| Factory-trimmed precision threshold | 4.63V ±2.5% eliminates calibration effort and external resistor networks |
| Push-pull active-high output | Direct interface to microcontroller reset pins without pull-up resistors or level shifters |
| VCC transient immunity | Rejects negative glitches ≤120µs at 100mV overdrive, preventing false resets |
| Wide VCC operating range | Functions reliably from 1.2V to 5.5V, supporting brown-out detection across diverse rail voltages |
Applications
| Li+ Battery End-of-Discharge Detection | Microcontroller Reset Supervision |
|---|---|
Use Scenario: Monitoring single-cell Li+ battery voltage (nominal 3.7V, cutoff ~3.0V) to trigger graceful shutdown before deep discharge. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset signal to MCU when battery drops below 4.63V-used as overvoltage warning or charger interlock. Use Value: Prevents unsafe charging of overvoltage cells; enables host firmware to log fault condition prior to power loss. |
Use Scenario: Ensuring reliable reset assertion during power-up, brown-out, and transient events in embedded controllers. IC Role / Device Role / Timing Role: Dedicated supervisor IC providing clean, glitch-immune reset pulse to µP reset pin upon VCC drop below 4.63V. Use Value: Eliminates need for RC-based reset circuits; guarantees valid reset state even at 1V VCC, improving system robustness. |
| DC/DC Converter Output Monitoring | Portable Medical Device Power Sequencing |
Use Scenario: Verifying regulated 5V output from DC/DC converter remains within safe operating window before enabling downstream loads. IC Role / Device Role / Timing Role: High-threshold detector (4.63V) placed post-regulator to monitor overvoltage faults that could damage sensitive analog front-ends. Use Value: Provides fail-safe protection against regulator runaway; fast 9.5µs response enables immediate load disconnect via external FET gate control. |
Use Scenario: Coordinating power-up sequence of sensor, ADC, and wireless module in handheld diagnostic tools. IC Role / Device Role / Timing Role: Voltage supervisor ensuring main 5V rail reaches 4.63V before releasing enable signals to subsystems. Use Value: Prevents metastability and latch-up in mixed-signal ICs by enforcing strict power-rail ordering with minimal BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6379XR46-T | Identical electrical specs; SC70-3 package (smaller footprint, 1.25mm × 0.8mm vs SOT23's 2.9mm × 1.6mm) | Preferred for space-constrained PCBs where thermal mass and assembly compatibility allow SC70 use | Select XR version when board area is critical and reflow profile supports SC70 handling |
| TLV803EB33DBZR | 4.38V threshold (not 4.63V); 350nA supply current; open-drain output requiring external pull-up | Suitable for lower-threshold overvoltage detection or where open-drain flexibility (e.g., wired-OR) is needed | Choose only if 4.38V trip point meets system margin requirements and pull-up resistor is acceptable |
Compared with MAX6379UR46-T, the XR46-T offers identical performance in a smaller package but requires SC70-compatible layout and assembly; the TLV803EB33DBZR provides lower quiescent current but lacks push-pull drive and precise 4.63V threshold, limiting direct substitution in reset-critical designs.
Availability
MAX6379UR46-T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, and industrial handheld instruments requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6379UR46-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, and communications markets.
The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in space- and energy-constrained applications, emphasizing precision, reliability, and zero-component simplicity.
FAQ
What is the exact reset threshold voltage of the MAX6379UR46-T?
The MAX6379UR46-T has a factory-trimmed nominal reset threshold voltage of 4.63V, with guaranteed accuracy of ±2.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the R46 suffix variant of the MAX6379 series.
Does the MAX6379UR46-T require an external pull-up resistor on its output?
No, the MAX6379UR46-T does not require an external pull-up resistor because it features an active-high push-pull output stage. The output drives high (VOH ≥ 0.8×VCC) when VCC falls below 4.63V and low (VOL ≤ 0.4V) otherwise, enabling direct connection to microcontroller reset inputs without additional components.
What package type is used for the MAX6379UR46-T?
The MAX6379UR46-T uses the 3-pin SOT23-3 package (lead-free, tape-and-reel). Its pinout is GND (Pin 1), OUT (Pin 2), and VCC (Pin 3). This is distinct from the SC70-3 variant (MAX6379XR46-T), which shares identical electrical behavior but occupies a smaller footprint.
Can the MAX6379UR46-T operate reliably at VCC = 1.2V?
Yes, the MAX6379UR46-T is guaranteed to maintain correct output logic state down to VCC = 1V, and its full specification-including 4.63V threshold accuracy and 500nA supply current-is validated from VCC = 1.2V to 5.5V. This makes it suitable for brown-out detection in ultra-low-voltage systems.
How does the MAX6379UR46-T handle short voltage transients on the VCC line?
The MAX6379UR46-T incorporates built-in transient immunity: it ignores negative-going VCC glitches up to ~120µs in duration when the overdrive (VTH – VCC) is 100mV. This behavior is characterized in the "Maximum Transient Duration vs. Threshold Overdrive" graph and prevents false resets during switching noise or load dumps.
MAX6379UR46-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:
- 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-T FAQ
1.How can I place an order for MAX6379UR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379UR46-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 MAX6379UR46-T reliable?
The price and inventory of MAX6379UR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379UR46-T is usually 5 days.
3.What payment methods are accepted for MAX6379UR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379UR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379UR46-T?
MAX6379UR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379UR46-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 MAX6379UR46-T?
For technical support, including MAX6379UR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379UR46-T requirements.
6.How does Aetrix verify that MAX6379UR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6379UR46-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 MAX6379UR46-T meets industry standards.
7.What is the process for return or replacement of MAX6379UR46-T?
All MAX6379UR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379UR46-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 MAX6379UR46-T part is unused and in its original packaging.
Return procedure for MAX6379UR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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