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Name: PCA9540BGD,125
Brand: NXP USA Inc.
SKU: PCA9540BGD,125
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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NXP USA Inc. PCA9540BGD,125

Part No.:: PCA9540BGD,125

Manufacturer:: NXP USA Inc.

Package:: 8-XFDFN

Datasheet:: PCA9540BGD,125.pdf

Description:: IC INTERFACE SPECIALIZED 8XSON

In Stock:: 2886

Quantity:: Add To Cart

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PCA9540BGD,125 Specifications

Package/Case:
8-XFDFN
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
Series:
-
ProductStatus:
Obsolete
Applications:
2-Channel I²C Multiplexer
Interface:
I²C
Voltage-Supply:
2.3V ~ 5.5V

PCA9540BGD,125 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including PCA9540BGD,125 price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for PCA9540BGD,125 to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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PCA9540BGD,125 information

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PCA9540BGD,125 Typical application Circuitry

PCA9540BGD,125

The PCA9540BGD,125 is an I2C-bus multiplexer that allows one I2C master to communicate with multiple I2C slave devices that may have conflicting addresses or to extend the I2C bus over longer distances. It's particularly useful in complex systems where multiple I2C devices need to be controlled by a single microcontroller, such as in server motherboards, multi-sensor systems, and advanced consumer electronics. The PCA9540BGD,125 can switch the connection between the master and two different I2C-bus slave groups, effectively increasing the number of I2C devices that can be managed.

Application Scenario: Multi-Sensor System for Environmental Monitoring

I2C Master Connection

- SDA/SCL (Pins 6 and 5): Connect these pins to the SDA and SCL lines of the I2C master device. This setup allows the PCA9540BGD,125 to receive commands from the master and switch the I2C bus lines accordingly.

I2C Bus Multiplexing

- Channel 0 SDA/SCL (Pins 8 and 7): Connect the SDA and SCL lines of the first group of I2C slave devices to these pins. This channel can be selected by the I2C master to communicate with these slaves.

- Channel 1 SDA/SCL (Pins 3 and 4): Connect the SDA and SCL lines of the second group of I2C slave devices to these pins. The I2C master can switch to this channel as needed.

Power Supply and Grounding

- VDD (Pin 1) for Power Supply: Connect VDD to a +3.3V power source. The PCA9540BGD,125's internal logic is powered by this pin.

- GND (Pin 2) for Ground: Attach GND to the ground of the system. This offers a point of reference for every signal.

Control and Configuration

- Address Pins (A0, A1): These are not directly present in PCA9540BGD,125 as the address is fixed; however, understanding that I2C addresses are predetermined in devices like this is crucial for avoiding address conflicts in the system design.

- Bus Enable: The I2C master controls the multiplexer through specific commands, enabling or disabling the connection to each channel.

Design Considerations

- Address Conflicts: Ensure that devices on different channels do not have conflicting addresses, even though the PCA9540BGD,125 allows for two sets of devices with the same addresses to be connected to the same master.

- Signal Integrity: Be mindful of the capacitance and length of the I2C lines, as extending the bus or adding devices increases the load, potentially requiring pull-up resistors to maintain signal integrity.

- Power Consumption: Although the PCA9540BGD,125 is designed for low power consumption, the total power usage of the system, including all I2C devices, should be considered, especially in battery-powered applications.

- Electromagnetic Compatibility (EMC): In complex systems, ensuring EMC compliance is crucial. Proper routing of I2C lines and shielding, if necessary, can mitigate interference.

- Failure Modes: Design the system to handle possible failure modes, including the PCA9540BGD,125 not switching correctly. Such failures ought to be detectable and recoverable by software.

Incorporating the PCA9540BGD,125 into a multi-sensor environmental monitoring system allows for the efficient management and communication with various sensors over the same I2C bus. By carefully addressing design considerations and ensuring proper configuration, the PCA9540BGD,125 can significantly enhance the capabilities and reliability of such systems, providing accurate and timely environmental data.

PCA9540BGD,125 FAQ

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6. What is the process for return or replacement of PCA9540BGD,125?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the PCA9540BGD,125 we delivered, we will accept the replacement or return of the PCA9540BGD,125 only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of PCA9540BGD,125.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations