Texas Instruments PCF8575 Data Sheet
Summary
Extend your microcontroller's capabilities with the PCF8575, a professional-grade 16-bit I/O expander optimized for use on the standardized I²C bus. This device provides up to 16 quasi-bidirectional pins and an open-drain interrupt output, offering robust remote digital expansion features. Ideal for embedded systems designers, this module facilitates seamless peripheral integration and reliable direct LED driving across numerous microcontroller platforms.
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SCPS121B − JANUARY 2005 − REVISED SEPTEMBER 2005
Low Standby-Current Consumption of Latched Outputs With High-Current Drive 10 µA Maximum Capability for Directly Driving LEDs I2C to Parallel-Port Expander Current Source to VCC for Actively Driving
a High at the Output
Open-Drain Interrupt Output
Latch-Up Performance Exceeds 100 m A Per
Compatible With Most Microcontrollers
JESD 78, Class II
400-k Hz Fast I2C Bus
ESD Protection Exceeds JESD 22
Address by Three Hardware Address Pins
− 2000-V Human-Body Model (A114-A)
for Use of Up To Eight Devices
− 200-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101)
DB, DBQ, DGV, DW, OR PW PACKAGE RHL PACKAGE RGE PACKAGE (TOP VIEW) (TOP VIEW) (TOP VIEW)
INT VCC
A1 SDA
A1 SDA
A2 SCL
A2 SCL IN
GND P10
description/ordering information This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 5.5-V VCC operation.
ORDERING INFORMATION
ORDERABLE TOP-SIDE
TA PACKAGE†
PART NUMBER MARKING
Reel of 2500 PCF8575DBR
SSOP − DB PF575
Reel of 250 PCF8575DBT
QSOP − DBQ Reel of 2500 PCF8575DBQR PCF8575 TVSOP − DGV Reel of 2000 PCF8575DGVR PF575
Tube of 25 PCF8575DW
SOIC − DW PCF8575
−40°C to 85°C Reel of 2000 PCF8575DWR Tube of 60 PCF8575PW TSSOP − PW Reel of 1200 PCF8575PWR PF575 Reel of 250 PCF8575PWT
QFN − RGE Reel of 3000 PCF8575RGER PF575 QFN − RHL Reel of 1000 PCF8575RHLR PF575
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page Summary Contents For Texas Instruments PCF8575 Data Sheet
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 28 |
| File Size | 720.13 KB |
| Published | June 22, 2026 |
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Frequently Asked Questions
What is the operating voltage range for the PCF8575?
It is designed for operation from 2.5-V to 5.5-V.
How can I use the device's unique IO ports (P0-P17)?
Each quasi-bidirectional I/O can function as either an input or output without needing a dedicated data-direction control signal.
What is the purpose of the open-drain interrupt output (INT)?
The INT pin generates an interrupt upon any rising or falling edge change detected on the port inputs when configured in input mode.