PCA9539RGER - Texas Instruments

Manufacturer Part Number

PCA9539RGER

Manufacturer

Texas Instruments

Introduction

The PCA9539RGER is a low-voltage 16-bit I/O expander with interrupt output and I2C bus/SMBus interface.

Product Features and Performance

High-quality Interface I/O Expander

16 individual I/Os with configurable polarity

I2C and SMBus interface compatible

Output type: Push-Pull for instant high/low output

Clock frequency support up to 400 kHz

Power-On Reset capability

Interrupt generation capability for input changes

Wide range of supply voltage from 2.3V to 5.5V

Sustainable operating temperature from -40°C to 85°C

Product Advantages

Flexible I/O expansion for MCU based systems

Strong output drive capability: 10mA sink, 25mA source

Suitable for battery-operated and low-power applications

Integrated POR feature reduces the need for external components

Allows for hot insertion due to Schmitt trigger action at SCL/SDA inputs

Key Technical Parameters

Number of I/O: 16

Interface: I2C, SMBus

Interrupt Output: Yes

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

Robust ESD protection

Latch-up performance meets 100 mA per JESD 78, Class II

Compatibility

Compatible with I2C-bus specification

SMBus compatible

Application Areas

Industrial controls

Automotive systems

Servers

Telecommunications

Consumer electronics

Product Lifecycle

Active product status

Not nearing discontinuation

Future support with replacements or upgrades available

Several Key Reasons to Choose This Product

Robust interface ideal for extending I/O capability with limited GPIOs

Supports hot swapping and I2C-bus arbitration and collision detection

Ensures system functionality with power-on reset and voltage translation

Space-saving design with its 24-VFQFN Exposed Pad package

Long-term supplier support confirming reliable source for future needs

High integration reduces the requirement for additional components, saving cost and space