PCA9535PW - Texas Instruments

Manufacturer Part Number

PCA9535PW

Manufacturer

Texas Instruments

Introduction

The PCA9535PW is an integrated circuit from Texas Instruments, serving as a 16-bit I/O expander with I2C and SMBus serial interface protocols.

Product Features and Performance

16-bit I/O ports for input/output expansion through I2C or SMBus

Provides interrupt output for input change detection

Supports Push-Pull output type for driving LEDs or other output devices

Power-on Reset (POR) feature

Capable of sourcing or sinking current of 10mA or 25mA per output

Supports a clock frequency of up to 400 kHz for serial communications

Operational across a wide voltage range from 2.3V to 5.5V

Designed for operation in temperatures ranging from -40°C to 85°C

Product Advantages

Increase in the number of I/O ports available on a microcontroller

Compact 24-TSSOP packaging saves board space

Compatibility with both I2C and SMBus increases flexibility for different communication protocols

Built-in POR feature simplifies power management and device initialization

Key Technical Parameters

Number of I/O: 16

Interface: I2C, SMBus

Interrupt Output: Yes

Output Type: Push-Pull

Current - Output Source/Sink: 10mA, 25mA

Clock Frequency: 400 kHz

Voltage - Supply: 2.3V ~ 5.5V

Operating Temperature: -40°C ~ 85°C

Quality and Safety Features

Compliant with industrial quality and safety standards

Ensures reliable performance over the specified temperature range

Compatibility

Compatible with microcontrollers supporting I2C or SMBus protocols

Surface mount design fits standard 24-TSSOP footprints

Application Areas

Embedded systems

I/O port expansion for microcontrollers

Industrial automation

Robotics

Remote I/O modules

Product Lifecycle

Obsolete status indicates that the manufacturer has discontinued the production

Alternatives or next-generation replacements may be available

Several Key Reasons to Choose This Product

Extended I/O port count enhances system capabilities without adding to microcontroller costs

Compact size and surface mount packaging align with modern space-saving design requirements

Versatility in interfacing with a wide range of supply voltages and microcontroller voltages

Ease of integration and improved system management due to the interrupt output feature

Suited for harsh environments with a wide operational temperature range