2-channel I²C bus expander with AEC-Q100 qualification
The PCA9540BDP/Q900J is a 2-channel I²C multiplexer from NXP, housed in an 8-TSSOP package. It lets a single I²C master communicate with two downstream buses, each selected via the control register — no extra GPIOs needed for chip-select.
Supply range and I²C compatibility
The pass-gate architecture isolates the downstream bus capacitance from the upstream bus, so each channel can drive its own capacitive load without degrading the master's rise time. The surface-mount profile suits automated assembly lines with standard reflow profiles.
Active lifecycle and sourcing posture
Sourced through authorized and independent distribution channels. RoHS3 compliant.