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PCA9554D,118 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
PCA9554D,118NXP6435Yes

PCA9554D,118** is an I2C-bus controlled 8-bit I/O expander manufactured by **NXP Semiconductors**.

The PCA9554D,118 is an I2C-bus controlled 8-bit I/O expander manufactured by NXP Semiconductors.

Key Specifications:

  • Interface: I2C-bus (up to 400 kHz)
  • Supply Voltage: 2.3 V to 5.5 V
  • Number of I/O Ports: 8 (individually configurable as input or output)
  • Interrupt Output: Active-low open-drain for monitoring input changes
  • Low Standby Current Consumption: Typically 1 µA
  • Operating Temperature Range: -40°C to +85°C
  • Package: SOIC-16

Features:

  • Configurable I/O Pins: Each pin can be independently set as input or output.
  • Internal Power-On Reset: Initializes registers to default state.
  • Schmitt-Trigger Inputs: Allows slow input transition and better noise immunity.
  • Latched Outputs: High drive capability for directly driving LEDs.
  • Compatible with Most Microcontrollers: Works with standard I2C protocols.

Applications:

  • LED dimming and blinking control
  • Keypad interface
  • Sensor monitoring
  • General-purpose I/O expansion

This device is commonly used in embedded systems where additional I/O ports are needed without increasing microcontroller pin count.

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