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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 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,143
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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 backup 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 drive capability, 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 - tolerating up to ~120µs glitches at 100mV underdrive per the transient immunity curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory-trimmed, ±2.5% over -40°C to +85°C) |
| Supply Current | 500nA (enables >10-year battery life in coin-cell applications) |
| Output Type | Active-high push-pull (drives high without external pull-up) |
| VCC Operating Range | 1.2V to 5.5V (guaranteed correct logic state down to 1V) |
| Propagation Delay | 9.5µs (typical, ensures timely reset assertion during brownout) |
| Threshold Hysteresis | 100mV (prevents chatter near trip point during slow VCC recovery) |
| Tempco | 40ppm/°C (low drift supports stable detection across industrial temp range) |
Pinout & Package
MAX6379UR46+T is housed in a 3-pin SOT23-3 package (lead-free, RoHS-compliant), with pin 1 = GND, pin 2 = OUT, pin 3 = VCC. The compact 2.92mm × 1.3mm footprint supports high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator; must be low-impedance connection |
| 2 | OUT | Active-high push-pull output; sinks up to 1.2mA / sources up to 500µA; directly interfaces microcontroller reset inputs |
| 3 | VCC | Supply input (1.2V–5.5V); powers internal circuitry and defines detection domain for monitored rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables multi-year operation on CR2032 coin cells in always-on monitoring |
| Precision factory-trimmed threshold | 4.63V ±2.5% eliminates manual calibration and external resistor networks |
| Push-pull active-high output | Directly drives MCU reset pins without pull-up resistors or level-shifting circuitry |
| VCC transient immunity | Rejects <120µs negative glitches at 100mV underdrive, preventing false resets |
| Wide VCC operating range | Functions correctly from 1.2V to 5.5V, supporting single-cell Li+, 3.3V, and 5V systems |
Applications
| Battery Backup Supervision | Microcontroller Reset Generation |
|---|---|
|
Use Scenario: Monitoring a 4.2V Li+ battery rail to trigger backup switchover before critical undervoltage. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset signal to enable load switch control logic. Use Value: 4.63V threshold aligns with Li+ end-of-discharge voltage; 500nA current minimizes standby drain. |
Use Scenario: Providing a clean, glitch-immune reset pulse to an ARM Cortex-M0 microcontroller during power-up and brownout. IC Role / Device Role / Timing Role: System supervisor generating active-high reset with 9.5µs propagation delay and 100mV hysteresis. Use Value: Push-pull output eliminates external pull-up, reducing BOM count and board area in space-constrained IoT nodes. |
| Portable Medical Sensor Power Sequencing | Industrial Data Logger Supply Monitoring |
|
Use Scenario: Enabling sequential power-up of analog front-end and BLE radio only after main 3.3V LDO reaches regulation. IC Role / Device Role / Timing Role: Active-high detector controlling enable line of downstream DC/DC converter via logic-level interface. Use Value: Guaranteed operation down to 1V VCC ensures reliable reset assertion even during deep brownout conditions. |
Use Scenario: Detecting failure of a 5V system rail in a remote environmental data logger powered by solar-charged battery. IC Role / Device Role / Timing Role: Precision voltage monitor interfacing to microcontroller ADC input and GPIO for dual-fault detection. Use Value: ±2.5% threshold accuracy over temperature avoids false alarms in uncontrolled outdoor enclosures (-40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector 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 ICC reduces battery life in ultra-low-power designs | Choose when 3.3V detection and I²C-bus compatibility are required |
| APX803S-46SA-7 | 4.63V threshold, active-high push-pull, 1.2µA supply current | Slightly higher ICC than MAX6379UR46+T; same SOT23-3 footprint but different marking and tempco (60ppm/°C) | Choose when AEC-Q100 qualification is needed for automotive body electronics |
Compared with TLV803EB33DBZR and APX803S-46SA-7, the MAX6379UR46+T delivers the lowest supply current (500nA) and tightest tempco (40ppm/°C) among 4.63V detectors in SOT23-3, making it optimal for long-life portable and medical devices where leakage and thermal drift are critical.
Availability
MAX6379UR46+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-backed real-time clocks, and industrial data loggers requiring stable component supply with lead-free compliance and tape-and-reel packaging.
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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX6375–MAX6380 family was developed specifically for ultra-low-power supply monitoring in space-constrained, battery-operated systems - prioritizing nanoscale current, factory-trimmed accuracy, and transient-hardened operation.
FAQ
What is the exact reset threshold voltage of the MAX6379UR46+T?
The MAX6379UR46+T has a factory-trimmed nominal reset threshold 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 corresponds to the "R46" suffix in the part number. The device maintains this specification without external calibration or trimming components.
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. Pin 2 (OUT) actively drives high (VOH ≥ 0.8×VCC) when VCC falls below 4.63V and actively drives low (VOL ≤ 0.4V) otherwise. This eliminates BOM cost and board space associated with discrete pull-up resistors commonly needed with open-drain detectors.
What package type and dimensions does the MAX6379UR46+T use?
The MAX6379UR46+T is supplied in a lead-free, RoHS-compliant 3-pin SOT23-3 package (JEDEC MO-178AA), measuring 2.92mm × 1.3mm × 1.0mm. Its pinout is standardized: Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC. This compact footprint is identical to other members of the MAX6375–MAX6380 family and supports automated pick-and-place assembly.
Can the MAX6379UR46+T operate reliably below 1.2V VCC?
Yes - the MAX6379UR46+T is guaranteed to maintain correct output logic state (active-high when VCC < VTH) down to 1.0V VCC, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. While its recommended operating range starts at 1.2V, functional behavior remains valid at 1.0V, enabling use in deep brownout detection scenarios where other supervisors may fail.
How does the MAX6379UR46+T handle short voltage transients on the VCC line?
The MAX6379UR46+T incorporates built-in transient immunity that suppresses false triggering from fast VCC glitches. Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive", it ignores negative-going transients shorter than ~120µs when VCC dips 100mV below 4.63V. This design prevents spurious resets during switching noise or load dump events in portable and industrial systems.
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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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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