PI3USB31532ZLEX

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The PI3USB31532ZLEX is an interface analog switch specifically designed for universal serial bus 3.1 applications. It is capable of I/O multiplexing, which allows for design flexibility and simplifies system integration and reduced components count by streamlining multiple logic, Mux and ADC functions. With the support of integrated bidirectional drive capability, it supports multiple signals, such as differential transceivers and on-board reference voltage.

The PI3USB31532ZLEX is based on CMOS and uses the added connection of two serial ports to replace the unidirectional function of the common switch. The analog switch matrix is composed of 5 bidirectional switches, which allows data functions/Chip Select (CS), status read/write, enable/reset, hot enable/disable to be electronically multiplexed, while maintaining differential signal integrity.

The PI3USB31532ZLEX can significantly reduce system cost and complexity, as it provides a complete solution for data flow control and status read/write, while combining the benefit of lower power and timing skews compared to traditional solutions.

The PI3USB31532ZLEX application field includes USB3.1 and other I/O applications. It features features a 5:1 bidirectional switch for high-speed PCB and backplane architectures. For USB3.1 applications, the device supports 3 buses in one including:

• A differential data bus
• A dedicated CS bus
• A dedicated status bus

The PI3USB31532ZLEX working principle is straightforward. It contains two inputs, A and B, and one output, Y, each of which is connected to a corresponding CS, DD and Status bus. The switch toggles between inputs A and B based on the logic level of the CS bus. It allows the data bus to be switched between A and B. The status bus contains control information of status data when input A is accepted, which indicated whether input A is active or inactive.

To work in a USB3.1 system, the PI3USB31532ZLEX can be configured as a Hot Enable/Disable or a Direct Interface Controller. In the former, the selection of which port is active is determined by a logic signal, while in the latter, the incoming port selection is determined by the logic state of the status buses when data is received on A.

The PI3USB31532ZLEX not only provides bidirectional switch capability, but also serves as an impedance controller by controlling the drive strength in both directions. This allows the system to maintain signal integrity and accuracy while offering a dynamic control of the drive strength. Therefore, it can optimize the design process and reduce the time taken to design a complete system.

In conclusion, the PI3USB31532ZLEX has clear applications in the field of USB3.1 and other I/O applications. Its working principle is straightforward, which ensures easy integration and reduced errors. With the support of integrated bidirectional drive capability, it can reduce the time spent on design and maintain signal integrity. Thus, it can be classified in the Interface - Analog Switches - Special Purpose category.

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