PCA9548APWR

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9548APWR is a multiplexer/demultiplexer IC that allows multiple devices to share a single communication bus. It provides a simple solution for expanding the number of I2C or SMBus channels in a system.

Characteristics: - Low voltage operation (1.65V to 5.5V) - Eight bidirectional channels - High-speed I2C bus interface (up to 400kHz) - Power-on reset function - Low standby current consumption - Small package size (TSSOP-24)

Package: TSSOP-24

Essence: The PCA9548APWR is designed to simplify the management of multiple I2C devices by enabling them to communicate with a single master device through a shared bus.

Packaging/Quantity: The PCA9548APWR is typically sold in reels of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: Up to 400kHz
• Number of Channels: 8
• Standby Current: 10µA (typical)

Pin Configuration

The PCA9548APWR has a total of 24 pins arranged in a TSSOP package. The pin configuration is as follows:

``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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Functional Features

• Channel Selection: The PCA9548APWR allows the user to select one of the eight channels for communication by setting the corresponding control bits.
• Bidirectional Communication: The IC supports bidirectional data transfer between the selected channel and the master device.
• Power-On Reset: Upon power-up, the PCA9548APWR performs a reset operation to ensure proper initialization of the device.
• Low Standby Current: The IC consumes minimal current in standby mode, reducing power consumption.

Advantages and Disadvantages

Advantages: - Simplifies I2C bus management in systems with multiple devices - Allows efficient utilization of a single communication bus - Low power consumption in standby mode - Compact package size

Disadvantages: - Limited to I2C and SMBus protocols - Requires additional control logic for channel selection

Working Principles

The PCA9548APWR operates by using control bits to select one of the eight channels. When a channel is selected, the IC connects the corresponding I2C bus lines to the master device, enabling communication with the desired slave device connected to that channel. The bidirectional nature of the IC allows data to be transmitted in both directions.

Upon power-up, the PCA9548APWR performs a power-on reset to ensure proper initialization. It then waits for the user to set the control bits to select the desired channel. In standby mode, the IC consumes minimal current, making it suitable for low-power applications.

Detailed Application Field Plans

The PCA9548APWR finds applications in various fields where multiple I2C or SMBus devices need to share a common bus. Some potential application areas include:

1. Industrial Automation: Controlling multiple sensors, actuators, and modules through a single I2C bus.
2. Automotive Electronics: Managing communication between various subsystems, such as infotainment systems, climate control, and driver assistance modules.
3. Consumer Electronics: Enabling multiple devices, such as displays, touch panels, and sensors, to communicate with a single controller.
4. Medical Devices: Facilitating communication between different medical sensors and monitoring devices in a compact and efficient manner.

Detailed and Complete Alternative Models

1. PCA9547PW: Similar to the PCA9548APWR but with seven channels instead of eight.
2. TCA9548A: A similar multiplexer/demultiplexer IC with eight channels, compatible with I2C and SMBus protocols.
3. TS5A23157: An analog switch IC that can be used for multiplexing/demultiplexing applications involving analog signals.

These alternative models provide similar functionality and can be considered based on specific requirements and compatibility with existing designs.

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