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PCF8575RGER

TIPCF8575RGER

Texas Instruments
I/O Expander 16 I2C, SMBus 400 kHz 24-VQFN (4x4)
Active2,378 in stock
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Overview

The PCF8575RGER is a 16-bit remote I/O expander designed for the I2C and SMBus interface, operating across a 2.5V to 5.5V supply range. It provides a simple solution for expanding the number of GPIOs on a microcontroller via a two-wire serial bus, featuring an open-drain interrupt output to signal the host of input state changes.

Why Choose This Part

The device features a low standby current of 10uA and includes a quasi-bidirectional I/O structure that eliminates the need for a data-direction register. Its robust ESD protection exceeding 2000V HBM and 400 kHz Fast I2C compatibility make it reliable for high-speed industrial communication.

Applications

Server and Telecom Hardware
Used for managing front-panel switches, status LEDs, and system configuration signals in rack-mounted equipment.
Industrial Control Panels
Expands the I/O count of PLCs or microcontrollers to monitor tactile buttons and drive indicator lamps.
Direct LED Driving
Utilizes the high-current drive capability of the latched outputs to control up to 16 LEDs without external transistors.

Key Specifications

Features POR
Interface I2C, SMBus
Output Type Push-Pull
Mounting Type Surface Mount
Number of I/O 16
Package / Case 24-VFQFN Exposed Pad
Clock Frequency 400 kHz
Interrupt Output Yes
Voltage - Supply 2.5V ~ 5.5V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 24-VQFN (4x4)
Current - Output Source/Sink 1mA, 25mA

Getting Started

To implement the PCF8575RGER, connect the SDA and SCL pins to the host I2C bus with appropriate pull-up resistors and configure the three hardware address pins (A0-A2) to set the unique bus address. Many standard I2C libraries for Arduino or Linux include built-in support for the PCF857x family, allowing for immediate bitwise control of the 16 I/O ports.

PCF8575 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
PCF8575RGER (this part) VFQFN-24 2,378
PCF8575DWR SOIC-24 3,619
PCF8575PWR TSSOP-24 376

Also Consider

TCA9535 TITexas Instruments - Offers 16 bits of I/O with a true push-pull output stage and internal registers for more granular configuration.
MCP23017 MCHPMicrochip Technology - Provides 16 I/O pins with full directionality control and high-speed 1.7MHz I2C support.

Categories

Interface ICs > I/O Expanders