PCA9546ADWG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PCA9546ADWG4 is a high-performance digital switch designed to support up to four SMBus and I2C buses. It is used in developing a variety of automation and control systems, as well as any application which requires communication between different I2C/SMBus devices. Such applications include PCs, printer servers, medical devices, automotive, industrial and consumer electronics. The chip is fully compatible with SMBus, I2C, and Serial Peripheral Interface (SPI) standards and provides flexibility and scalability when connecting to a variety of devices such as I2C/SMBus sensors and memories.

The PCA9546ADWG4 is a quad-channel digital switch for I2C and SMBus that provides a simple and effective means of switching or controlling four separate communication buses. It is designed to enable the user to access multiple I2C or SMBus devices at the same time, with minimum interface complexity. The PCA9546ADWG4 supports bidirectional data transfers and operates as an open-drain device. It also offers protection against voltage surges, ESD and latchup.The device consists of one analog multiplexer, four digital switches and one level shifter. The multiplexer enables the selection of one of four channels, while each of the four channels consists of one digital switch, allowing bidirectional data transfer between the channel and the I/O pin of the device. The level shifter ensures that the interface is logic-level compatible between the two I2C/SMBus ports.

The PCA9546ADWG4 is ideal for applications where multiple I2C or SMBus devices are used, such as PC peripherals, data storage, printers and modems. It supports two I2C/SMBus standards, fast-mode (400kHz) and standard-mode (100kHz). This enables the user to dynamically switch between these two standards, providing the flexibility to support various types of slave devices. The device also supports eight address pins, which can be used to select up to 256 different slave devices on the I2C/SMBus. The active-low enable pins provide power-down control, allowing the device to be disabled when not in use.

The PCA9546ADWG4 supports multiple-access modes, allowing different devices to interact with each other and share the same bus. It is designed with a fault-tolerant Auto Select mode, which can automatically select a slave device without any external input. The Auto Select mode is used in applications where multiple slaves are connected to the same bus and a master is selecting one slave at a time. The device also supports Multiple Master mode, which allows two or more masters to communicate on the same bus.

The PCA9546ADWG4 also provides an over-voltage protection (OVP) feature, to protect the device from damage due to excessive voltage. This OVP feature is especially important in automotive applications, where noise and electrical interference from the power system can cause the device to become damaged. The device also provides an open-drain feature that can be used to detect errors or fault conditions on the bus.

In conclusion, the PCA9546ADWG4 is a versatile digital switch ideal for applications which require communication between I2C/SMBus devices. It provides an efficient and economical way to enable multiple I2C/SMBus connections, while also providing over-voltage protection and open-drain feature. It is easy to use and provides a reliable and scalable solution for a variety of communications tasks.

The specific data is subject to PDF, and the above content is for reference