PCA9545A Overview
Key Specifications
Package: TSSOP
Mount Type: Surface Mount
Pins: 20
Operating Voltage: 2.5 V
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.
Key Features
- 1 1-of-4 Bidirectional Translating Switches
- I2C Bus and SMBus Compatible
- Four Active-Low Interrupt Inputs
- Active-Low Interrupt Output
- Active-Low Reset Input
- Two Address Terminals, Allowing up to Four Devices on the I2C Bus
- Channel Selection via I2C Bus, in Any Combination
- Power-Up With All Switch Channels Deselected
- Low RON Switches
- Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
