PCF8575C

I2C or SMBus Master

(e.g. Processor)

Peripheral Devices

RESET, ENABLE,

or control inputs

INT or status

outputs

LEDs

SDA

SCL

INT

A0

A1

A2

GND

VCC

P00

P01

P02

P03

P04

P05

P06

P07

Peripheral Devices

RESET, ENABLE,

or control inputs

INT or status

outputs

LEDs

P10

P11

P12

P13

P14

P15

P16

P17

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

PCF8575C

SCPS123F – MARCH 2005 – REVISED JANUARY 2015

with Interrupt Output

1 Features

3 Description

This 16-bit I/O expander for the two-line bidirectional

1

•

•

Open-Drain Interrupt Output

operation.

•

Low Standby-Current Consumption of

The PCF8575C provides general-purpose remote I/O

10

μA Maximum

•

Compatible With Most Microcontrollers

interface serial clock (SCL) and serial data (SDA).

•

The

device

features

a

16-bit

quasi-bidirectional

•

Address by Three Hardware Address Pins for Use

input/output (I/O) port (P07–P00, P17–P10), including

of up to Eight Devices

latched outputs with high-current drive capability for

directly driving LEDs. Each quasi-bidirectional I/O can

•

Latched Outputs With High-Current Drive

be used as an input or output without the use of a

Capability for Directly Driving LEDs

data-direction control signal. At power on, the I/Os

•

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

fast-rising edges into heavily loaded outputs. This

•

ESD Protection Exceeds JESD 22

device turns on when an output is written high and is

switched off by the negative edge of SCL. The I/Os

–

2000-V Human-Body Model

should be high before being used as inputs. After

–

200-V Machine Model

power on, as all the I/Os are set to 3-state, all of them

–

1000-V Charged-Device Model

can be used as inputs. Any change in setting of the

I/Os as either inputs or outputs can be done with the

2 Applications

write mode. If a high is applied externally to an I/O

that has been written earlier to low, a large current

•

Telecom Shelters: Filter Units

•

Servers

Device Information(1)

•

Routers (Telecom Switching Equipment)

PART NUMBER

PACKAGE (PIN)

BODY SIZE

•

Personal Computers

SSOP (24)

8.20 mm × 5.30 mm

•

Personal Electronics

QSOP (24)

8.65 mm × 3.90

•

Industrial Automation

TVSOP (24)

5.00 mm × 4.50 mm

•

Products with GPIO-Limited Processors

PCF8575C

SOIC (24)

15.40 mm × 7.50 mm

TSSOP (24)

7.80 mm × 4.40 mm

QFN (24)

4.0 mm × 4.0 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.