The PCA9665/PCA9665A serves as an interface between many standard parallel-bus microcontrollers/microprocessorsand the serial I²C-bus and allows the parallel bus system to communicate bidirectionally with the I²C-bus. ThePCA9665/PCA9665A can operate as a master or a slave and can be a transmitter or receiver. Communication with theI²C-bus is carried out on a Byte or Buffered mode using interrupt or polled handshake. The PCA9665/PCA9665Acontrols all the I²C-bus specific sequences, protocol, arbitration and timing with no external timing elementrequired.
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
Feature
- 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
- 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
