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Name: PCA9546APW
Brand: Texas Instruments
SKU: PCA9546APW
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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Texas Instruments PCA9546APW

Part No.:: PCA9546APW

Manufacturer:: Texas Instruments

Package:: 16-TSSOP (0.173, 4.40mm Width)

Datasheet:: PCA9546APW.pdf

Description:: IC INTERFACE SPECIALIZED 16TSSOP

In Stock:: 2178

Quantity:: Add To Cart

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PCA9546APW Specifications

Package/Case:
16-TSSOP (0.173, 4.40mm Width)
Packaging:
Tube
Series:
-
ProductStatus:
Obsolete
Applications:
Translating Switch
Interface:
I²C, SMBus
Voltage-Supply:
2.3V ~ 5.5V

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PCA9546APW information

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PCA9546APW Typical application Circuitry

PCA9546APW

The PCA9546APW is a 4-channel I2C-bus multiplexer, enabling a single I2C master to interface with up to four I2C devices, which could have the same address, by selecting one of four channels at a time.

PCA9546APW Application Scenarios:

1. I2C Bus Expansion: Used in complex embedded systems or IoT devices where several I2C devices, possibly with identical addresses, need to be managed by a single I2C master.

2. Multi-Sensor Systems: Ideal for systems with multiple sensors on the I2C bus, allowing the master to communicate with each sensor individually, even if they share the same I2C address.

PCA9546APW Key Features and Parameters:

1. 4-Channel I2C Multiplexer: Allows four I2C slave channels to be controlled by a single I2C master.

2. I2C-Bus Interface: Fully compatible with I2C-bus standards, ensuring easy integration.

3. Low Standby Current: Energy-efficient design suitable for battery-powered devices.

4. Wide Voltage Range: Operates typically within a 2.3V to 5.5V range, suitable for various logic levels.

5. No Channel Lock-Up: If the selected channel becomes stuck, the multiplexer does not lock up and can still switch to other channels.

Circuit Connection Example: Multi-Sensor I2C System

Overview: Implementing PCA9546APW in a system with multiple I2C sensors.

1. Power Supply Connection: VCC (pin 16) should be connected to the system's power supply, within the 2.3V to 5.5V range.

2. Grounding the Device: GND (pin 8) needs to be connected to the system's ground.

3. I2C Master Connection: SDA (pin 15) and SCL (pin 14) should be connected to the SDA and SCL lines of the I2C master.

4. Connecting I2C Sensors to Channels: SD0 to SD3 (pins 1-4) and SC0 to SC3 (pins 5-8) are for connecting the SDA and SCL lines of the I2C sensors on each channel.

5. Channel Selection: A0, A1, and A2 (pins 13, 12, and 11, respectively) are used for addressing and channel selection, determining which I2C channel is active.

Design Considerations:

1. Voltage Level Compatibility: Ensure VCC matches the I2C master and sensor logic levels.

2. Channel Address Configuration: Correctly set A0, A1, and A2 for proper channel selection.

3. Bus Capacitance Management: Monitor the total bus capacitance to stay within I2C specifications.

4. Avoiding Channel Lock-Up: Be aware that the PCA9546APW allows switching channels even if one becomes non-responsive.

5. Power Efficiency: Take advantage of the low standby current feature for energy-efficient operation.

In conclusion, the PCA9546APW is a valuable component for expanding I2C capabilities in systems with multiple I2C devices. Its 4-channel multiplexing, I2C compatibility, and efficient design make it especially useful in multi-sensor systems and complex I2C-bus configurations.

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6. What is the process for return or replacement of PCA9546APW?

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 PCA9546APW we delivered, we will accept the replacement or return of the PCA9546APW 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 PCA9546APW.

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

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