PCA9665; PCA9665A

Overview

The PCA9665/PCA9665A serves as an interface between many 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 leader or a follower 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

Parallel-bus to I²C-bus protocol converter and interface
Both leader and follower functions
Multi-leader capability
Internal oscillator trimmed to 15 % accuracy reduces external components
1 Mbit/s and up to 25 mA SCL/SDA I_OL (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

Parallel-bus to I²C-bus protocol converter and interface
Both leader and follower functions
Multi-leader capability
Internal oscillator trimmed to 15 % accuracy reduces external components
1 Mbit/s and up to 25 mA SCL/SDA I_OL (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