PCA9665BS,118

Parallel Bus to I2C Bus Controller I2C Interface 2.5V/3.3V 20Pin HVQFN EP T/R

Overview

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

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## 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

* 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

## Target 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

## Features