Buffered Four-Channel Two-Wire Bus Switch

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Block diagram of PCA9646


Key Features

  • Drop-in pin compatible with PCA9546A, etc.
  • Each I/O is impedance isolated from all others allowing maximum capacitance on all branches
  • 30 mA static sink capability on all ports
  • Works with I2C-bus (standard-mode, fast-mode and fast-mode plus (Fm+)), SMBus (standard and high power mode) and PMBus
  • Fast switching times allow operation in excess of 1 MHz
  • Allows driving of large loads (e.g., 5 × 4 nF)
  • Hysteresis on I/O increases noise immunity
  • Operating voltages from 2.7 V to 5.5 V
  • Uncomplicated characteristics suitable for quick implementation in most common 2-wire bus applications
  • 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

Part numbers include: PCA9646PW.


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