General description

The PCA9665/PCA9665A 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/PCA9665A 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/PCA9665A controls all the I2C-bus specific sequences, protocol, arbitration

and timing with no external timing element required.

The PCA9665 and PCA9665A have the same footprint as the PCA9564 with additional

features:

• 1 MHz transmission speeds

• Up to 25 mA drive capability on SCL/SDA

• 68-byte buffer

• I2C-bus General Call

• Software reset on the parallel bus

Features and benefits

 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

 Standard-mode and Fast-mode I2C-bus capable and compatible with SMBus

 PCA9665A ‘glitch-free’ restart is suitable for use with buffer drivers

 ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per

JESD22-C101

 Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

 Packages offered:

 PCA9665: SO20, TSSOP20, HVQFN20

 PCA9665A: TSSOP20