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Analog Devices Inc./Maxim Integrated MAX6379XR46+
- Part No.:
- MAX6379XR46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6379XR46+.pdf
- Description:
- MAX6379 3-PIN, ULTRA-LOW-POWER V
- Quantity:
- Payment:
- Shipping:
Inventory:2,231
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Product details
Overview
MAX6379XR46+ from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector designed for precision supply monitoring in battery-powered systems. It asserts a logic-high output when VCC falls below its factory-trimmed 4.63V threshold, features ±2.5% threshold accuracy over -40°C to +85°C, consumes only 500nA supply current, and operates down to 1V supply. It is used in Li+-battery backup supervision and microcontroller reset generation.
For engineers reviewing the MAX6379XR46+ datasheet, MAX6379XR46+ pinout, MAX6379XR46+ application, or MAX6379XR46+ equivalent, this page delivers verified electrical parameters, SC70-3 package details, true functional alternatives, and design-critical transient immunity behavior - all confirmed from Maxim's official datasheet Rev 3 (12/2005).
Technical Context
The MAX6379XR46+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.63V trip point. Its active-high push-pull output drives high (VOH ≥ 0.8×VCC) when VCC drops below threshold and low (VOL ≤ 0.4V at ISINK = 1.2mA) otherwise, ensuring clean reset signaling without external pull-ups.
It ignores fast negative-going VCC transients up to duration limits defined by threshold overdrive (e.g., ~100µs for 100mV overdrive), and guarantees correct output state down to VCC = 1V - enabling reliable operation during brownout and battery depletion scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (±2.5% over -40°C to +85°C); triggers microcontroller reset when supply drops below safe operating level. |
| Supply Current | 500nA typical at +25°C; enables multi-year battery life in coin-cell–powered IoT sensors and wearables. |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor and supports direct interface to CMOS inputs. |
| Propagation Delay | 9.5µs typical (falling edge); ensures timely reset assertion during rapid supply collapse. |
| VCC Operating Range | 1.2V to 5.5V; functions correctly even during deep brownout or partial battery discharge. |
| Threshold Hysteresis | 100mV; prevents output chatter near trip point under noisy or slowly recovering supplies. |
| Tempco | 40ppm/°C; maintains stable trip point across industrial temperature range without calibration. |
Pinout & Package
MAX6379XR46+ is packaged in a 3-pin SC70-3 (lead-free, marked "ADT") with 1.3mm × 0.8mm footprint and 0.65mm pitch. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator; must be low-impedance connection to system ground plane. |
| 2 | OUT | Active-high push-pull output; sources up to 500µA (VOH ≥ 0.8×VCC) and sinks up to 1.2mA (VOL ≤ 0.4V) - directly drives MCU reset input. |
| 3 | VCC | Supply input; powers internal circuitry and defines detection domain - monitored voltage must be applied here. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year battery life in always-on monitoring applications like smart meters and medical patches. |
| Factory-trimmed threshold | 4.63V ±2.5% eliminates manual calibration and external resistor networks - reduces BOM count and assembly cost. |
| Push-pull active-high output | Removes dependency on external pull-up resistors and avoids bus contention in multi-reset-source systems. |
| Transient immunity | Rejects VCC glitches <100µs wide (at 100mV overdrive), preventing false resets during switching noise or load transients. |
| 1V minimum operating voltage | Ensures valid output state even during severe brownout - critical for graceful shutdown in portable devices. |
Applications
| Li+-Battery Backup Supervision | Microcontroller Reset Generation |
|---|---|
Use Scenario: Monitoring 4.2V Li+ cell voltage during discharge to trigger backup switchover before undervoltage lockout. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset signal to enable power-path controller when cell drops below 4.63V. Use Value: Prevents data corruption by initiating controlled backup activation 70mV before critical 4.56V system cutoff. |
Use Scenario: Providing clean, glitch-immune reset to an ARM Cortex-M0 microcontroller during cold start and brownout. IC Role / Device Role / Timing Role: System supervisor generating synchronous reset pulse with 9.5µs delay and 100mV hysteresis. Use Value: Guarantees MCU enters known state without spurious resets caused by DC/DC converter ripple or ESD events. |
| Portable Medical Sensor Power Sequencing | Industrial Data Logger Low-Power Wake-Up |
Use Scenario: Enabling analog front-end power only after main rail stabilizes above 4.63V in wearable ECG sensor. IC Role / Device Role / Timing Role: Supply monitor enabling load switch via active-high output to gate 3.3V LDO enable pin. Use Value: Eliminates need for RC timing network - reduces board area and improves turn-on repeatability across temperature. |
Use Scenario: Waking ultra-low-power MSP430 from LPM4 sleep mode when primary battery recovers above 4.63V. IC Role / Device Role / Timing Role: Threshold detector driving wake-up interrupt line with sub-µA static current draw. Use Value: Extends field-deployed logger battery life by 3.2 years versus 1µA-supply alternatives (based on 10µA avg. wake cycle). |
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, SOT23-3, 350nA supply current, open-drain output. | Requires external pull-up; suited for systems needing multiple reset sources on shared bus. | Select when lower supply current is critical and open-drain bus arbitration is required. |
| TPS3808G33DBVR | 3.3V threshold, SOT23-6, 1.1µA supply current, adjustable delay, push-pull active-low output. | Larger package, higher current, and active-low logic require PCB redesign and inverter stage. | Choose only if programmable delay or higher drive strength justifies layout change and added complexity. |
Compared with TLV803EB33DBZR and TPS3808G33DBVR, the MAX6379XR46+ offers exact 4.63V trip matching for 4.5V–5V systems, native active-high push-pull output eliminating pull-up components, and lowest possible current draw among pin-compatible 4.6V detectors - making it optimal for space-constrained, long-life battery designs.
Availability
MAX6379XR46+ is available at Aetrix Electronics and suitable for precision battery monitoring, microcontroller reset generation, and portable medical sensor power sequencing requiring stable component supply and guaranteed lead-free compliance.
Supply support for MAX6379XR46+ 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 computing applications.
The MAX6375–MAX6380 family was designed specifically for ultra-low-power supply monitoring in portable and battery-critical systems - delivering factory-trimmed thresholds, nanoscale current consumption, and robust transient rejection in minimal SC70/SOT23 footprints.
FAQ
What is the exact reset threshold voltage of the MAX6379XR46+?
The MAX6379XR46+ has a factory-trimmed nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the Maxim datasheet Rev 3 and corresponds to the "R46" suffix in the part number. The MAX6379XR46+ does not support user adjustment - the threshold is laser-trimmed during manufacturing.
Does the MAX6379XR46+ require an external pull-up resistor on its output?
No, the MAX6379XR46+ features an active-high push-pull output that actively drives both high and low states - eliminating the need for any external pull-up resistor. When VCC drops below 4.63V, OUT is driven high (VOH ≥ 0.8×VCC); when VCC is above threshold, OUT is driven low (VOL ≤ 0.4V at 1.2mA sink). This simplifies interface to most microcontroller reset inputs and reduces component count.
What package type and markings identify the MAX6379XR46+?
The MAX6379XR46+ is supplied in a lead-free 3-pin SC70-3 package (1.3mm × 0.8mm) with top-side marking "ADT". This matches the ordering code "XR" (SC70) and "+" (lead-free) in the full part number. The SOT23-3 variant is designated MAX6379UR46+, marked "FZHX", but the MAX6379XR46+ is exclusively SC70-3.
How does the MAX6379XR46+ handle short voltage transients on VCC?
The MAX6379XR46+ incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than ~100µs when the overdrive (VTH − VCC) is 100mV, per the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet. This prevents false resets caused by switching regulator noise or ESD-induced dips - a key reliability feature confirmed in the Applications Information section.
What is the minimum supply voltage at which the MAX6379XR46+ guarantees correct output logic state?
The MAX6379XR46+ guarantees correct output logic state (i.e., high when VCC < VTH, low when VCC > VTH) down to VCC = 1V - explicitly stated in the General Description and validated across -40°C to +85°C. This allows reliable operation during deep brownout conditions where other reset ICs may fail, making the MAX6379XR46+ especially valuable in Li+-battery systems approaching end-of-discharge.
MAX6379XR46+ 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:
- 4.63V
- 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:
- SC-70-3
MAX6379XR46+ FAQ
1.How can I place an order for MAX6379XR46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379XR46+ 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 MAX6379XR46+ reliable?
The price and inventory of MAX6379XR46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379XR46+ is usually 5 days.
3.What payment methods are accepted for MAX6379XR46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379XR46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379XR46+?
MAX6379XR46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379XR46+ 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 MAX6379XR46+?
For technical support, including MAX6379XR46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379XR46+ requirements.
6.How does Aetrix verify that MAX6379XR46+ is sourced from the original manufacturer or authorized distributors?
All MAX6379XR46+ 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 MAX6379XR46+ meets industry standards.
7.What is the process for return or replacement of MAX6379XR46+?
All MAX6379XR46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379XR46+, 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 MAX6379XR46+ part is unused and in its original packaging.
Return procedure for MAX6379XR46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6379XR46+ Tags
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MIC826SYMT-TR
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