Part Number : PCA9545APW
Function : 4-CHANNEL I2C AND SMBus MULTIPLEXER and SMbus Switch
Package : SOIC, TSSOP, VQFN 20 Pin Type
Maker : Texas Instruments
Pinouts : 
Description :
The PCA9545A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels.
Features
1. 1-of-4 Bidirectional Translating Switches
2. I2C Bus and SMBus Compatible
3. Four Active-Low Interrupt Inputs
4. Active-Low Interrupt Output
5. Active-Low Reset Input
Block Diagram
Official Homepage : https://www.ti.com/product/PCA9545A
Datasheet PDF Download : 
Others datasheet of same file :
PCA9545A, PCA9545ADGVRG4, PCA9545ADW,
PCA9545ADWG4, PCA9545ADWR
