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PCA9506 - 40-bit I2C-bus I/O port

General Description

The PCA9505/PCA9506 provide 40-bit parallel input/output (I/O) port expansion for I2Cbus applications organized in 5 banks of 8 I/Os.

At 5 V supply voltage, the outputs are capable of sourcing 10 mA and sinking 15 mA with a total package load of 600 mA to allow direct driving of 40 LEDs.

Key Features

  • Standard mode (100 kHz) and Fast mode (400 kHz) compatible I2C-bus serial interface.
  • 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os.
  • 40 configurable I/O pins that default to inputs at power-up.
  • PCA9505 includes 100 kΩ internal pull-up resistors on all the I/Os.
  • Outputs:.
  • Totem-pole (10 mA source, 15 mA sink) with controlled edge rate output structure.
  • Active LOW output enable (OE) input pin 3-states all outputs.
  • Output s.

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PCA9505_9506 40-bit I2C-bus I/O port with RESET, OE and INT Rev. 5 — 30 September 2021 Product data sheet 1 General description The PCA9505/PCA9506 provide 40-bit parallel input/output (I/O) port expansion for I2Cbus applications organized in 5 banks of 8 I/Os. At 5 V supply voltage, the outputs are capable of sourcing 10 mA and sinking 15 mA with a total package load of 600 mA to allow direct driving of 40 LEDs. Any of the 40 I/O ports can be configured as an input or output. Output ports are totem-pole and their logic state changes at the Acknowledge (bank change). The PCA9505 is identical to the PCA9506 except that it includes 100 kΩ internal pull-up resistors on all the I/Os.