Serial communication bus invented, I2C Bus, i2c communication protocol

 PCA9515A Series 3.6 V 5 mA 400 kHz 6 pF I2C-bus Repeater - SOIC-8

https://www.futureelectronics.com/p/semiconductors--comm-products--i2c/pca9515adp-118-nxp-7183946