Electronic Design

Controller Chip Ties Parallel Buses To The Serial I²C Bus

The first parallel-to-serial I2C interface lets designers add I2C interfaces to any digital system. The PCA9564 controller provides a 400-kHz I2C serial bus and operates from 2.5 to 3.3 V. The chip is optimized to interface to the 8051-family of microcontrollers. It can also be used with most other processor and DSP chips, and it enables multiple I2C devices or SMBus components to tie into the processor. It can operate as an I2C master or slave and as a transmitter or receiver. At the same time, it controls all of the I2C-bus specific sequences, protocol, arbitration, and timing, with no external clock source required. The controller is available in a 20-pin small-outline, TSSOP, or HVQFN package. It costs $2.25 each in lots of 10,000 units.

Philips Semiconductors
www.semiconductors.philips.com/logic/i2c; (800) 234-7381

TAGS: Digital ICs
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