For BusinessPricing
Request a demo

PCA9545APWR AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

PCA9545APWR product

PCA9545APWR

Specialized

I2C switchSMBus switch4-channelI2C address conflictTSSOP-20interrupt handling

PCA9545APWR is a 4-channel I2C/SMBus switch for isolating downstream buses, resolving repeated slave-address conflicts, and supporting per-channel interrupt reporting.

Best for

  • Separating I2C devices with duplicate slave addresses
  • Segmenting I2C bus capacitance
  • Systems requiring per-channel interrupt indication

Avoid if

  • I2C operation above 400 kHz is required
  • A single unsegmented bus is sufficient

Check before use

  • Verify pull-up resistor values for every enabled bus segment
  • Keep total enabled I2C bus capacitance within the applicable limit
  • Ensure RESET is pulled up to VCC and is not driven above VCC

Key specifications

I2C channels
4
Supply voltage
2.3 V to 5.5 V
Maximum I2C frequency
400 kHz
Package
TSSOP-20, 0.65 mm pitch
Operating temperature
-40 °C to 85 °C

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
Level-1-260C-UNLIM
ECCN
-
HTSUS
-

Application

Industrial control I2C expansionServer and router management busesMultiple identical sensor modules

Datasheet

Texas-Instruments-company-64.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for PCA9545APWR: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
Get Files
PCB Footprint
Land pattern for PCB layout
Get Files
3D Model
STEP file for mechanical design
Get Files
KiCad Library
Verified KiCad 8 symbol, footprint, and 3D model
Generate library

Login required · CAD models billed separately as an add-on

Where to Buy

Real-time and catalog pricing from verified distributors

Live prices updated on demand · Catalog (~) prices may differ

Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

PCA9545APWR is the TSSOP-20 ordering variant of the Texas Instruments PCA9545A. It is a four-channel bidirectional translating switch controlled through an I2C or SMBus interface.