PCF8574

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

P0

P1

P2

P3

P4

P5

P6

P7

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PCF8574

SCPS068I – JULY 2001 – REVISED NOVEMBER 2015

1 Features

3 Description

This 8-bit input/output (I/O) expander for the two-line

1

•

Low Standby-Current Consumption of 10

μA Max

•

•

Open-Drain Interrupt Output

The

PCF8574

device

provides

general-purpose

•

Compatible With Most Microcontrollers

remote

I/O

expansion

for

most

microcontroller

•

Latched Outputs With High-Current Drive

Capability for Directly Driving LEDs

(SCL), serial data (SDA)].

•

Latch-Up Performance Exceeds 100 mA

The device features an 8-bit quasi-bidirectional I/O

Per JESD 78, Class II

port (P0–P7), including latched outputs with high-

current drive capability for directly driving LEDs. Each

quasi-bidirectional I/O can be used as an input or

2 Applications

output without the use of a data-direction control

•

Telecom Shelters: Filter Units

signal. At power on, the I/Os are high. In this mode,

•

Servers

•

Routers (Telecom Switching Equipment)

•

Personal Computers

PART NUMBER

PACKAGE (PIN)

BODY SIZE (NOM)

•

Personal Electronics

TVSOP (20)

5.00 mm × 4.40 mm

•

Industrial Automation

SOIC (16)

10.30 mm × 7.50 mm

•

Products with GPIO-Limited Processors

PDIP (16)

19.30 mm × 6.35 mm

PCF5874

TSSOP (20)

6.50 mm × 4.40 mm

QFN (16)

3.00 mm × 3.00 mm

VQFN (20)

4.50 mm × 3.50 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.