PCA9555PWR Part Information

Details for PCA9555PWR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

Part 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 operation) registers. At power on, the I/Os are configured as inputs. 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 Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

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Part Specifications

Chip Configuration 16bit
Bus Frequency 400kHz
IC Interface Type I2C SMBus
Supply Voltage Min 2.3V
Supply Voltage Max 5.5V
Interface Case Style TSSOP
No. of Pins 24Pins
Product Range -
RoHS Compliant

Alternative Part Descriptions

  • 16-bit 2.3- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers | Texas Instruments

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