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Analog Devices Inc./Maxim Integrated MAX6380UR43-T
- Part No.:
- MAX6380UR43-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6380UR43-T.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6380UR43-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 4.30V threshold, ±2.5% accuracy over temperature, 500nA supply current, and operation down to 1V VCC - designed for precision power-supply monitoring in battery-backed microcontroller reset circuits.
For engineers reviewing the MAX6380UR43-T datasheet, MAX6380UR43-T pinout, MAX6380UR43-T application, or MAX6380UR43-T equivalent, this device serves as a space-constrained, low-quiescent-current supervisor for portable systems requiring reliable brownout detection at 4.3V with transient immunity and no external components.
Technical Context
The MAX6380UR43-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.30V trip point. It asserts an active-low open-drain output (OUT) when VCC falls below VTH, holding valid logic states down to 1V supply.
It features built-in immunity to fast negative-going VCC transients (≤200µs for 10mV overdrive), propagation delay of 9.5µs (typ), and hysteresis of 0.1mV - enabling robust reset generation without external RC timing or filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.30V ±2.5% over -40°C to +85°C - ensures accurate brownout detection across industrial temperature range |
| Supply Current | 500nA typical - enables multi-year battery life in coin-cell–powered devices |
| Output Type | Active-low open-drain - supports flexible pull-up to any logic rail ≤5.5V and wired-OR reset bus sharing |
| VCC Operating Range | 1.2V to 5.5V - guarantees correct output state even during deep brownout or cold-start conditions |
| Propagation Delay | 9.5µs typical (falling edge) - provides fast, deterministic reset assertion without excessive latency |
| Threshold Hysteresis | 0.1mV - prevents chatter near trip point under noisy or slowly recovering supplies |
| Tempco | 40ppm/°C - minimizes drift-induced false triggers across temperature gradients |
Pinout & Package
MAX6380UR43-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT23) | GND | Ground reference for internal bandgap and comparator - must be low-impedance connection to system ground plane |
| 2 (SOT23) | OUT | Active-low open-drain output - requires external pull-up resistor; sinks up to 100µA while asserted |
| 3 (SOT23) | VCC | Supply input - powers internal circuitry; monitors this node for undervoltage condition relative to 4.30V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 500nA supply current | Extends battery service life in always-on monitoring applications such as real-time clocks and backup supervisors |
| Factory-trimmed 4.30V threshold | Eliminates need for external resistor divider or calibration - reduces BOM count and layout area |
| Open-drain active-low output | Enables shared reset bus with multiple supervisors and compatibility with 1.8V/3.3V/5V logic domains via pull-up selection |
| 1V minimum operating voltage | Ensures valid reset assertion during deep discharge or cold-temperature startup where VCC may dip below 1.2V |
| Transient immunity (≤200µs glitch rejection) | Prevents spurious resets caused by switching noise or load-dump events on power rails |
Applications
| Battery Backup Supervisor | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring Li-ion or coin-cell supply feeding real-time clock (RTC) or SRAM backup domain. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset signal to preserve data integrity during brownout. Use Value: 500nA quiescent current prevents measurable battery drain over years; 4.30V threshold aligns with common 4.2V Li-ion end-of-discharge voltage. |
Use Scenario: Providing clean, glitch-immune reset to ARM Cortex-M or RISC-V microcontrollers during power-up and brownout. IC Role / Device Role / Timing Role: Supervisory IC generating hardware reset pulse when main 3.3V or 5V supply drops below 4.30V. Use Value: 9.5µs propagation delay ensures timely reset before CPU executes invalid instructions; open-drain output allows direct interface to MCU nRST pin. |
| Portable Medical Sensor Node | Industrial Data Logger |
Use Scenario: Power supervision in wearable ECG or glucose monitor powered by single alkaline cell (1.5V nominal). IC Role / Device Role / Timing Role: Undervoltage detector triggering graceful shutdown before sensor ADC or BLE radio fails. Use Value: Operation down to 1V VCC ensures full utilization of battery capacity; ±2.5% threshold accuracy maintains consistent shutdown voltage across temperature. |
Use Scenario: Monitoring regulated 5V supply in remote environmental logger using SD card and GPS module. IC Role / Device Role / Timing Role: System-level voltage supervisor preventing corrupted writes to flash memory during AC line sag. Use Value: 0.1mV hysteresis avoids oscillatory reset during slow supply recovery; 5.5V absolute max rating tolerates transient overvoltage events. |
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 fixed threshold, 350nA supply current, push-pull output, SOT23-3 | Lacks open-drain flexibility; unsuitable for wired-OR reset buses or mixed-voltage systems | Select when lower quiescent current is critical and push-pull drive suffices |
| TPS3808G33DBVR | 3.3V threshold, 1.1µA supply current, adjustable delay, open-drain, SOT23-6 | Higher IQ and larger 6-pin package; includes programmable reset timeout not present in MAX6380UR43-T | Select when reset timeout functionality is required and 6-pin layout is acceptable |
Compared with TLV803EB33DBZR and TPS3808G33DBVR, the MAX6380UR43-T offers precise 4.30V detection with ultra-low 500nA IQ in a minimal 3-pin SOT23 footprint - making it optimal for compact, long-life systems needing exact brownout response at that voltage level without added complexity.
Availability
MAX6380UR43-T is available at Aetrix Electronics and suitable for battery backup supervisors, microcontroller reset circuits, portable medical sensor nodes, and industrial data loggers requiring stable component supply and guaranteed long-term sourcing.
Supply support for MAX6380UR43-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 high-performance analog and mixed-signal semiconductor solutions for industrial, communications, computing, and consumer applications.
The MAX6375–MAX6380 family delivers ultra-low-power, factory-trimmed voltage detection for space- and energy-constrained systems - targeting portable equipment, battery-powered instrumentation, and embedded controllers needing reliable, maintenance-free power supervision.
FAQ
What is the exact factory-trimmed threshold voltage of the MAX6380UR43-T?
The MAX6380UR43-T has a nominal threshold voltage of 4.30V, 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 of the official datasheet; the "R43" suffix explicitly denotes the 4.30V variant within the MAX6380 series.
Does the MAX6380UR43-T require external components to operate?
No, the MAX6380UR43-T requires no external components for basic operation. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Only an external pull-up resistor on the open-drain OUT pin is needed to establish logic-high state - no capacitors, dividers, or adjustments are necessary for standard voltage detection use.
What is the minimum VCC voltage at which the MAX6380UR43-T guarantees correct output logic state?
The MAX6380UR43-T guarantees correct output logic state (active-low when VCC < VTH, inactive-high when VCC ≥ VTH) down to 1V VCC. This is specified in the datasheet's Absolute Maximum Ratings and Electrical Characteristics sections, enabling reliable reset assertion even during deep brownout or cold-temperature battery discharge.
Can the MAX6380UR43-T be used with a 1.8V logic system?
Yes, the MAX6380UR43-T can interface with 1.8V logic systems. Its open-drain OUT pin is compatible with any pull-up voltage from 1.2V to 5.5V. When pulled up to 1.8V, the asserted (low) state remains valid (≤0.4V), and the high-impedance release state reaches ~1.8V - satisfying standard 1.8V CMOS input thresholds for microcontrollers and FPGAs.
How does the MAX6380UR43-T handle fast power-supply transients?
The MAX6380UR43-T rejects fast negative-going VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 10mV, per the Typical Operating Characteristics graph. This inherent immunity prevents false resets caused by switching noise, load dumps, or coupling spikes - eliminating need for external RC filters in most PCB layouts.
MAX6380UR43-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:
- 4.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6380UR43-T FAQ
1.How can I place an order for MAX6380UR43-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6380UR43-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 MAX6380UR43-T reliable?
The price and inventory of MAX6380UR43-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6380UR43-T is usually 5 days.
3.What payment methods are accepted for MAX6380UR43-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6380UR43-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6380UR43-T?
MAX6380UR43-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6380UR43-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 MAX6380UR43-T?
For technical support, including MAX6380UR43-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6380UR43-T requirements.
6.How does Aetrix verify that MAX6380UR43-T is sourced from the original manufacturer or authorized distributors?
All MAX6380UR43-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 MAX6380UR43-T meets industry standards.
7.What is the process for return or replacement of MAX6380UR43-T?
All MAX6380UR43-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6380UR43-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 MAX6380UR43-T part is unused and in its original packaging.
Return procedure for MAX6380UR43-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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