PCA9548APW,118
Overview
The PCA9548APW,118 is an 8-channel bidirectional translating I2C-bus switch that enables communication between a master device and eight sets of downstream I2C devices. It allows for the resolution of I2C address conflicts and provides voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses. The device features an active LOW reset input to recover from bus hang conditions and supports clock frequencies up to 400 kHz.
Why Choose This Part
The component provides flexibility by allowing any combination of channels to be selected simultaneously via software. It offers low ON-state resistance for minimal signal degradation and features 6V tolerant inputs, making it robust for diverse industrial and consumer electronic environments. Its extremely low standby current of 1 uA makes it ideal for power-sensitive applications.
Applications
Key Specifications
Getting Started
To implement this part, connect the master I2C bus to the SDAT/SCLT pins and define the device address using the three hardware address pins (A0, A1, A2). Use a standard I2C write command to the switch's internal register to select the desired downstream channels. Ensure pull-up resistors are correctly sized for the target bus capacitance on both the master and all active slave segments.
Also Consider
