Fm+ Parallel Bus to I²C-Bus Controller

PCA9665_PCA9665A

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

Product Details

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Block Diagram

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PCA9665_PCA9665A BLOCK DIAGRAM

PCA9665_PCA9665A BLOCK DIAGRAM

Block diagram: PCA9665BS, PCA9665D, PCA9665N, PCA9665PW

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Features

Key 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 IOL (Fast-mode Plus (Fm+)) capability
  • I2C-bus general call capability
  • Software reset on parallel bus
  • 68-byte data buffer
  • 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

Operating Supply Voltage

  • 2.3 V to 3.6 V

ESD Protection

  • Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

Latch-Up Testing

  • Done to JEDEC Standard JESD78, which exceeds 100 mA

Packages

  • PCA9665: SO20, TSSOP20, HVQFN20
  • PCA9665A: TSSOP20

Documentation

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Design Resources

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Design Files

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  • Symbols and Footprints

    PCA9665PW-TSSOP20-CAD Symbol and PCB Footprint – BXL File

    ZIPRev 1Sep 22, 2020 09:14:0038.0 KBPCA9665PW-TSSOP20-BXL
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  • Symbols and Footprints

    PCA9665APW-TSSOP20-CAD Symbol and PCB Footprint – BXL File

    ZIPRev 1Jul 9, 2020 10:43:0037.9 KBPCA9665APW-TSSOP20-BXL
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