PCA9554PWG4

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

PCA9554PWG4 is an I/O Expander developed by NXP Semiconductors. It has been designed to provide an easy way to expand the number of I/O pins available on a Microcontroller or Processor. The device provides eight individually programmable bidirectional I/O pins (GPIOs), organized as two 8-bit ports. PCA9554PWG4 supports various features including a low power consumption mode, programmable output current source/sink capability, and a high degree of flexibility for I/O port configuration.

The hardware architecture of the PCA9554PWG4 consists of a small memory IO cell, an 8-bit shift register, 8 output buffers, and a control bus. The control bus consists of four lines - Data, Clock, Reset, and Acknowledge. The Data line is used for programming and controlling the device, and the Clock line is used to synchronize the data transactions. The Reset line is used to reset the device, and the Acknowledge line is used to indicate when a transaction of data is complete.

PCA9554PWG4 is suitable for a wide range of applications, including wireless communication, consumer electronics, safety and security systems, industrial control, and audio and communications systems. As a low-power I/O expander, PCA9554PWG4 is particularly suitable for applications where power conservation and low-voltage (<1.65V) operation are paramount. Additionally, because it is pin-compatible with a wide range of Microcontrollers and Processors, it can be seamlessly integrated into new or existing designs.

The working principle of the PCA9554PWG4 is as follows. The device is configured by writing and reading data via its four-line control bus. At startup, or when the Reset line is activated, the device is initialized and all bits of the configuration registers and I/O pins are set to zero. The Data and Clock lines are then used to write and read data from the device registers. The data is shifted bit-by-bit over the data line, and the bits are clocked in or out of the device on the rising edge of the Clock signal.

Once the desired configuration is programmed, the I/O pins can be used as either inputs or outputs, depending on the configuration of the associated registers. For output pins, the output state can be set by writing to the associated Output Register. For input pins, the state of the pin is read from the associated Input Register or by using the Interrupt Register, in cases where an interrupt has been triggered. The PCA9554PWG4 is capable of sinking/ sourcing up to 8mA per output, as well as providing a high degree of configurability and flexibility.

In summary, PCA9554PWG4 is a low-power I/O Expander designed to provide a programmable, bidirectional interface between a Microcontroller or Processor and a wide range of peripherals. PCA9554PWG4 has a wide range of applications, including wireless communication, consumer electronics, security systems, industrial control, and audio and communications systems.

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