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PCA9555 Key Features

  • 1 Low Standby-Current Consumption of 1 μA Max
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • 5-V Tolerant I/O Ports
  • patible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Address by Three Hardware Address Pins for Use
  • Polarity Inversion Register
  • Latched Outputs With High-Current Drive
  • ESD Protection Exceeds JESD 22

Other PCA9555 Datasheets

Manufacturer Part Number Description
NXP Logo NXP Semiconductors PCA9555 16-bit I2C-bus and SMBus I/O port
nexperia Logo Nexperia PCA9555 Low-voltage 16-bit I2C-bus I/O port
NXP Logo NXP Semiconductors PCA9555A Low-voltage 16-bit I2C-bus I/O port

View all PCA9555 datasheets →

PCA9555 Description

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)]. The PCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low...