PCF8574A

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

Product

Folder

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Technical

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PCF8574A

SCPS069F – JULY 2001 – REVISED NOVEMBER 2015

1

1 Features

•

Low Standby-Current Consumption of 10

μA Max

3 Description

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

•

•

Open-Drain Interrupt Output

•

Compatible With Most Microcontrollers

The PCF8574A device provides general-purpose

•

Latched Outputs With High-Current Drive

remote

I/O

expansion

for

most

microcontroller

Capability for Directly Driving LEDs

•

Latch-Up Performance Exceeds 100 mA Per

data (SDA)].

JESD 78, Class II

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

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

2 Applications

current drive capability for directly driving LEDs. Each

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

•

Telecom Shelters: Filter Units

output without the use of a data-direction control

•

Servers

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

•

Routers (Telecom Switching Equipment)

•

Personal Computers

•

Personal Electronics

PART NUMBER

PACKAGE (PIN)

BODY SIZE (NOM)

•

Industrial Automation

VQFN (20)

4.50 mm × 3.50 mm

•

Products with GPIO-Limited Processors

PDIP (16)

19.30 mm × 6.35 mm

PCF8574A

SOIC (16)

10.30 mm × 7.50 mm

TSSOP (20)

6.50 mm × 4.40 mm

TVSOP (20)

5.00 mm × 4.40 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.