PCF8574 I/O Expander IC
The PCF8574 from NXP is a remote 8-bit I/O expander integrated circuit for I2C-bus applications, allowing additional input/output pins for microcontrollers. Falls under HTS 8542.39.00 as an 'other' electronic integrated circuit functioning as a digital port expander. Used in embedded systems requiring more GPIO pins.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing significant processing logic
ICs with embedded microcontrollers shift to 8542.31, while simple port expanders remain 8542.39.
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Import Tips & Compliance
• Document I2C slave addressing capabilities (8 addresses) for interface classification
• Specify quasi-bidirectional port characteristics vs. true bidirectional
• Include pull-up resistor requirements in application notes
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