Source: https://web.archive.org/web/20210404174226/https://twitter.com/Siliconinsid/status/1378764720338051072 Text: Philips PCF8574A (1995) The PCF8574 is a 8 bit quasi-bidirectional I/O expander for the I2C bus.
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Source: https://web.archive.org/web/20210404174226/https://twitter.com/Siliconinsid/status/1378764720338051072 Text: Philips PCF8574A (1995) The PCF8574 is a 8 bit quasi-bidirectional I/O expander for the I2C bus.