400 kHz I²C bus buffer for HDMI and general-purpose fan-out
The NXP PCA9507DP,118 is a single-channel I²C buffer and accelerator in an 8-TSSOP package. It accepts a 2-wire bus input and drives a 2-wire bus output, with a maximum data rate of 400 kHz — the standard I²C Fast-mode ceiling.
Input capacitance and supply current budget
Input capacitance is 6 pF, low enough that adding this buffer to an existing I²C bus does not push the total bus capacitance past the 400 pF Fast-mode limit for a typical run of a few devices. Supply current draws 1 mA typical — negligible in a power budget shared with an HDMI transmitter or a system controller.