NXP PCA9561PW I²C-bus to Parallel-Bus Bridge

The NXP PCA9561PW is a versatile bridge chip designed to seamlessly interface I²C-bus protocols with parallel-bus systems. This compact and efficient integrated circuit (IC) is a part of NXP's extensive interface products portfolio, providing a reliable solution for expanding I²C-bus communication to parallel interface devices.

Encased in a TSSOP16 package, the PCA9561PW is engineered to facilitate communication between an I²C-bus and an 8-bit parallel-bus. It is particularly useful for applications where there is a need to convert I²C-bus signals to a parallel interface or vice versa, thus enabling the use of a wider range of peripherals that do not natively support I²C.

Featuring a bidirectional data direction pin (DIR) that controls the direction of data flow, this bridge chip is highly adaptable and can serve in both master and slave configurations. The PCA9561PW operates over a wide supply voltage range from 2.3V to 5.5V, making it suitable for interfacing with both low-voltage and standard I²C-bus devices and parallel-bus microcontrollers.

Key features of the PCA9561PW include:

• 8-bit parallel-bus to I²C-bus protocol converter
• Low standby current consumption
• Active LOW interrupt output
• 400 kHz I²C-bus frequency support
• Software programmable I²C-bus addresses
• Hardware or software control of the direction of data flow
• Compliant with I²C-bus Fast-mode specifications

The device's interrupt output feature allows for efficient data processing, as it can alert the host controller when data is available to read or when the output buffer is ready to be written to. Additionally, the PCA9561PW's programmable I²C-bus addresses provide flexibility in system design, enabling the connection of multiple devices on the same I²C-bus without address conflicts.

Designed with an eye on ease of integration, the PCA9561PW is ideal for a range of applications, including microcontroller system expansion, peripheral device control, and embedded systems requiring a bridge between parallel and serial communication protocols. Its robust design ensures reliable data transfer and interoperability across diverse electronic components and systems.