8-Bit I²C-Bus and SMBus Low Power I/O Port with Interrupt

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PCA9534 Block Diagram

PCA9534 Block Diagram

Block diagram: PCA9534BS, PCA9534BS3, PCA9534D, PCA9534PW


  • 8-bit I2C-bus GPIO
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • 5 V tolerant I/Os
  • Polarity Inversion register
  • Active LOW interrupt output
  • Low standby current
  • Noise filter on SCL/SDA inputs
  • No glitch on power-up
  • Internal power-on reset
  • 8 I/O pins which default to 8 inputs
  • 0 Hz to 400 kHz clock frequency
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Offered in four different packages: SO16, TSSOP16, and HVQFN16 (4 x 4 x 0.85 mm and 3 x 3 x 0.85 mm versions)


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