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Analog Devices Inc./Maxim Integrated MAX6379UR37+T
- Part No.:
- MAX6379UR37+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6379UR37+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,852
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Product details
Overview
MAX6379UR37+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 3.70V 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 the threshold and is used in portable equipment power sequencing and microcontroller reset supervision.
For engineers reviewing the MAX6379UR37+T datasheet, MAX6379UR37+T pinout, MAX6379UR37+T application, or MAX6379UR37+T equivalent, key selection criteria include its 3.70V trip point, active-high push-pull output configuration, SC70/SOT23-3 package compatibility, transient immunity, and sub-1µA quiescent current - all critical for low-power embedded reset and brownout detection.
Technical Context
The MAX6379UR37+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.70V threshold. Its active-high push-pull output drives high during undervoltage conditions without requiring external pull-up components. The device ignores fast VCC transients up to defined duration limits per threshold overdrive.
It operates across -40°C to +85°C with ±2.5% threshold accuracy and exhibits 9.5µs typical propagation delay (falling edge). Supply current remains stable at 500nA over temperature and voltage, enabling long battery life in always-on monitoring applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.70V nominal, ±2.5% over -40°C to +85°C - ensures reliable brownout detection at defined system rail level |
| Supply Current | 500nA typical - enables multi-year operation on coin-cell batteries in standby monitoring |
| Output Type | Active-high push-pull - directly interfaces with MCU reset inputs without external pull-up resistor |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full-system power-up sequences |
| Propagation Delay | 9.5µs typical (MAX6378–MAX6380 family) - provides fast response to supply faults while rejecting noise |
| Threshold Hysteresis | 100mV - prevents output oscillation near trip point during slow-ramping supply conditions |
| Tempco | 40ppm/°C - maintains tight threshold stability across industrial temperature range |
Pinout & Package
MAX6379UR37+T is packaged in a 3-pin SOT23-3 (lead-free, +T suffix) with JEDEC MO-178AC outline. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC. This compact 2.92mm × 1.3mm footprint supports high-density PCB layouts in space-constrained portable designs.
| 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 current when VCC < 3.70V; sinks current when VCC ≥ 3.70V; drives standard CMOS inputs directly |
| 3 | VCC | Supply input - powers internal circuitry and defines monitored rail; valid from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 500nA enables >10-year battery life in coin-cell–powered IoT sensors and wearables |
| Factory-trimmed threshold | 3.70V ±2.5% eliminates calibration overhead and reduces BOM count vs. discrete resistor-divider solutions |
| Push-pull active-high output | Directly asserts MCU reset pins without pull-up resistors - saves board space and simplifies layout |
| Transient immunity | Rejects VCC glitches ≤9.5µs at 100mV overdrive - prevents false resets in noisy power environments |
| Wide VCC operating range | Functions down to 1.2V - ensures correct state retention during deep brownout and cold-start conditions |
Applications
| Portable Battery Monitoring | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Monitoring Li-ion battery discharge in Bluetooth earbuds to trigger graceful shutdown before deep depletion. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset signal to suspend system operation when battery drops below 3.70V. Use Value: Prevents battery over-discharge and extends cycle life by enforcing precise cutoff voltage without software intervention. |
Use Scenario: Ensuring reliable boot initialization in a smart thermostat powered by a 3.3V LDO. IC Role / Device Role / Timing Role: Active-high reset supervisor holding MCU in reset until regulated 3.3V rail stabilizes above 3.70V. Use Value: Eliminates need for RC-based reset circuits - guarantees deterministic, temperature-stable reset timing. |
| Power Sequencing in Wearables | Load Switch Enable Control |
|
Use Scenario: Coordinating power-up order of RF transceiver and sensor subsystems in a fitness tracker. IC Role / Device Role / Timing Role: Voltage monitor enabling secondary regulator only after main 3.7V rail reaches valid level. Use Value: Prevents latch-up and back-powering by enforcing strict sequencing with no external timing components. |
Use Scenario: Controlling enable input of a load switch protecting a USB-C port in a portable speaker. IC Role / Device Role / Timing Role: Undervoltage detector disabling load switch when input drops below 3.70V to prevent unstable operation. Use Value: Adds robust over-discharge protection without increasing gate-drive complexity or component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB37DBZR | 3.7V threshold, active-high open-drain output, 350nA supply current, SOT23-3 | Requires external pull-up resistor; lower supply current but higher output impedance | Preferred where lowest possible quiescent current is critical and system already includes pull-up infrastructure |
| APX803S-37SA-7 | 3.7V threshold, active-high push-pull output, 1.1µA supply current, SOT23-3 | Higher supply current; wider operating temperature range (-40°C to +125°C) | Selected for automotive under-hood applications requiring extended temperature capability |
Compared with TLV803EB37DBZR and APX803S-37SA-7, the MAX6379UR37+T delivers optimal balance of ultra-low 500nA current, push-pull simplicity, and industrial-grade accuracy - making it ideal for cost-sensitive, battery-constrained consumer electronics where board space and BOM count are prioritized.
Availability
MAX6379UR37+T is available at Aetrix Electronics and suitable for portable equipment, microcontroller reset supervision, and power sequencing applications requiring stable component supply, consistent lead-free packaging, and long-term production continuity.
Supply support for MAX6379UR37+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, medical, and consumer systems.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-operated devices, emphasizing nanoscale quiescent current, factory-trimmed accuracy, and minimal external component requirements.
FAQ
What is the exact reset threshold voltage of the MAX6379UR37+T?
The MAX6379UR37+T has a factory-trimmed nominal reset threshold of 3.70V, 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 "R37" suffix variant of the MAX6379 series.
Does the MAX6379UR37+T require an external pull-up resistor on its output?
No, the MAX6379UR37+T features an active-high push-pull output that actively drives both high and low states. Unlike open-drain detectors, it does not require an external pull-up resistor - simplifying design and reducing component count. This behavior is explicitly documented for MAX6376/MAX6379 in the Pin Description and Features sections.
What is the minimum supply voltage at which the MAX6379UR37+T remains functional?
The MAX6379UR37+T is guaranteed to maintain correct output logic state down to 1V VCC, as stated in the General Description and Absolute Maximum Ratings. This allows reliable operation during deep brownout conditions and ensures deterministic reset assertion even as the supply collapses.
How does the MAX6379UR37+T handle power supply transients?
The MAX6379UR37+T incorporates built-in transient immunity and ignores fast negative-going VCC glitches. Its maximum tolerable transient duration decreases as threshold overdrive increases - e.g., ~200µs at 10mV overdrive, ~20µs at 100mV overdrive - per the Typical Operating Characteristics graph MAX6375-04.
Is the MAX6379UR37+T available in both SC70 and SOT23 packages?
The MAX6379UR37+T is specified in the Ordering Information as a SOT23-3 package ("UR" prefix). The SC70-3 variant is designated as MAX6379XR37+T ("XR" prefix). Both share identical electrical specifications, but differ in physical outline, thermal resistance, and marking codes - confirming distinct, non-interchangeable package options.
MAX6379UR37+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:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.7V
- 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
MAX6379UR37+T FAQ
1.How can I place an order for MAX6379UR37+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6379UR37+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 MAX6379UR37+T reliable?
The price and inventory of MAX6379UR37+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6379UR37+T is usually 5 days.
3.What payment methods are accepted for MAX6379UR37+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6379UR37+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6379UR37+T?
MAX6379UR37+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6379UR37+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 MAX6379UR37+T?
For technical support, including MAX6379UR37+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6379UR37+T requirements.
6.How does Aetrix verify that MAX6379UR37+T is sourced from the original manufacturer or authorized distributors?
All MAX6379UR37+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 MAX6379UR37+T meets industry standards.
7.What is the process for return or replacement of MAX6379UR37+T?
All MAX6379UR37+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6379UR37+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 MAX6379UR37+T part is unused and in its original packaging.
Return procedure for MAX6379UR37+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6379UR37+T Tags
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MIC826SYMT-TR
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