NXP | PCA9665PW,118

The PCA9665 serves as an interface between most standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus and allows the parallel bus system to communicate bidirectionally with the I2C-bus. The PCA9665 can operate as a master or a slave and can be a transmitter or receiver. Communication with the I2C-bus is carried out on a Byte or Buffered mode using interrupt or polled handshake. The PCA9665 controls all the I2C-bus specific sequences, protocol, arbitration and timing with no external timing element required.

Features:

• Parallel-bus to I2C-bus protocol converter and interface
• Both master and slave functions
• Multi-master capability
• Internal oscillator trimmed to 15 % accuracy reduces external components
• 1 Mbit/s and up to 25 mA SCL/SDA IOL (Fast-mode Plus (Fm+)) capability
• I2C-bus General Call capability
• Software reset on parallel bus
• 68-byte data buffer
• Operating supply voltage: 2.3 V to 3.6 V
• 5 V tolerant I/Os

Applications:

• Add I2C-bus port to controllers/processors that do not have one
• Add additional I2C-bus ports to controllers/processors that need multiple I2C-bus ports
• Converts 8 bits of parallel data to serial data stream to prevent having to run a large number of traces across the entire printed-circuit board