PCA9554ADB,118

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PCA9554ADB is a logic level serial I2C-bus and SMBus expander, a member of the PCA9554 series of I/O expanders developed by NXP, which provides 8-bit input/output (I/O) expansion for complex static or related dynamic system applications. The PCA9554ADB is the primary input/output (I/O) device family in the NXP complete interface product portfolio. It includes 16 I/O pins, two 8-bit configurable ports A and B, a 32-bit non-volatile random access memory (EEPROM), which is used to store configuration data, and an 8-bit divider counter. It supports programmable input/output polarity inversion, programmable I/O push-pull/open-drain selection and external hardware reset functions.

The PCA9554ADB excels primarily in the field of embedded systems platforms intended for products that need to control the environment. Based on the PCA9554ADB, developers can build various types of I/O applications in a product. The PCA9554 series of I/O expanders supports various programmable input/output configurations, including port A/B, push-pull/open-drain selection, I/O output polarity inversion, as well as support for external hardware reset.

The PCA9554ADB 8-bit I/O expander can be used in embedded system design applications in a variety of industrial environments. Its key features include programmable I/O push-pull/open-drain selection, I/O polarity inversion, 16 mA output current, OV/UV protection, 2-pin reset input, 1.8 V to 5.5 V I2C-bus and SMBus supply, external wake-up function, programmable I/O ports and flexible I/O pin assignment. The PCA9554ADB is an ideal choice for embedded system design applications operating in extreme temperatures, because it supports a wide range of temperature operating conditions with an extended temperature range from -40°C to + 105°C.

The PCA9554ADB is designed for a wide range of applications, such as keyboard and mouse controllers, smart meters, industrial automation, access control and wireless point-of-sale (POS) configuration, as well as 8-bit port expansion applications in a variety of appliances, white goods and consumer systems. The device can be used in a variety of system peripheral applications, including in network-connected environmental controllers, hand-held controllers, intelligent tools and accessory switches, touch switches, and I/O boards.

The PCA9554ADB works on the I2C-bus protocol and provides 8-bit input/output (I/O) expansion for complex static or related dynamic systems. This device includes two 8-bit ports (each containing 8 I/O pins) that are operated with a serial I2C-bus interface, a 32-bit EEPROM and an 8-bit divider counter. All I/O pins of the PCA9554ADB can be configured as either input or output using the I2C-bus. To configure I/O pins, the PCA9554ADB will send a set of control bytes to its serial port using the I2C-bus. To establish communication with the PCA9554ADB, the I2C-bus address needs to be known.

The PCA9554ADB has two bit operations, read and write, to control the I/O pins. When an input register is written, the Output port\'s contents are also communicated to the I2C-bus master. Writing to the output register controls the state of the output pins. The I2C-bus master controls the state of PCA9554ADB\'s output pins by writing to the output register. The PCA9554ADB also has a register for controlling the polarity inversion of the IO pins, which can be programed to either be OFF or ON.

PCA9554ADB is an effective solution that offers quick and easy integration into embedded products. It is an ideal choice for embedded system design applications that require quick and cost-effective I/O expansion. Its extensive features make it an attractive economical choice for designers who wish to maximize the cost-performance ratio of their products. Its I2C-bus support, temperature range and wide variety of applications mean that the PCA9554ADB is truly a powerful choice for I/O expansion.

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