A new parallel to serial interface I2C bus controller introduced by Royal Philips Electronics operates at 400 kHz and at voltages of 3.3V to 2.5 V. Designated PCA9564 it is optimized for interfacing microprocessors (MPUs), microcontrollers (MCUs) and DSPs with multiple I2C devices or SMBus components.
The simplicity of the plug-and-play 2-wire interface and low-cost of implementation resulting from a large installed user base has made the I2C bus the de-facto industry standard serial bus for control, maintenance and configuration operations in many electronic applications.
According to Philips the PCA9564 can operate as an I2C master or slave and as a transmitter or receiver, while controlling all of the I2C-bus specific sequences, protocol, arbitration and timing, with no external clock source required. This device also allows MCUs and MPUs that do not have an integrated I2C port to interface with I2C or SMBus components, or it can provide additional ports where multiple I2C bus ports are needed, the company said.
As core voltages continue to decrease and as more devices are added to the I2C bus, faster communication speeds are required to ensure the bus does not slow performance by delaying other processor actions. The PCA9564 also provides a lower voltage and higher frequency migration path for users of Philips' PCF8584 bus controller.
The PCA9564 Bus Controller is available in 20-pin SO, TSSOP and HVQFN packages for $2.25 in 10K quantities. For more information on this device, application notes, evaluation boards, and other I2C logic offerings from Philips, please click here.