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NCA9555 - 16-bit I2C-bus I/O port

General Description

10 10 10 6.1.

DEVICE ADDRESS 10 6.2.

COMMAND BYTE10 6.3.

Key Features

  • Operating power supply voltage range of 2.3 V to 5.5 V.
  • 5 V tolerant I/Os.
  • I2C to Parallel Port Expander.
  • Polarity Inversion register.
  • Active LOW interrupt output.
  • Compatible With Most Microcontrollers.
  • Address by Three Hardware Address Pins for Use of up to Eight Devices.
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs.
  • Low standby current.
  • Noise filter on SCL/SDA inputs.
  • No glitch on power-up.
  • Internal p.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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NCA9555 16-bit I2C-bus I/O port with interrupt Datasheet (EN) 1.4 Product Overview The NCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus applications. It provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc. The NCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each Input or Output is kept in the corresponding Input or Output register. The polarity of the read register can be inverted with the Polarity Inversion register.