Part Number : PCA9545AD
Function : 4-CHANNEL I2C AND SMBus MULTIPLEXER
Package : SO 20 Type
Maker : NXP Semiconductors.
Pinouts : 
Description :
The PCA9545AD, PCA9545A / PCA9545B / PCA9545C is a quad bidirectional translating switch controlled via the I2C-bus.
The SCL/SDA upstream pair fans out to four downstream pairs, or channels.
Block Diagram
Features
1. 1-of-4 bidirectional translating switches
2. I 2C-bus interface logic; compatible with SMBus standards
3. 4 active LOW interrupt inputs
4. Active LOW interrupt output Active LOW reset input
5. 2 address pins allowing up to 4 devices on the I2C-bus
Datasheet PDF Download : 
Others datasheet of same file :
9545A, PA9545A, PA9545B, PA9545C, PCA9545A
