PCF8574TD datasheet, PDF - EEWORLD Datasheet

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PCF8574TD: DescriptionInterface - I/O Expanders REMOTE I/O EXPANDER; CategoryThe embedded processor and controller Microcontrollers and processors; File Size806KB，33 Pages; ManufacturerNXP; Websitehttps://www.nxp.com; Environmental Compliance

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PCF8574TD Overview

Interface - I/O Expanders REMOTE I/O EXPANDER

PCF8574TD Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	NXP
Parts packaging code	SOIC
package instruction	SOP,
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
maximum clock frequency	0.1 MHz
External data bus width	1
JESD-30 code	R-PDSO-G16
JESD-609 code	e4
length	10.3 mm
Humidity sensitivity level	1
Number of I/O lines	8
Number of ports	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	2.65 mm
Maximum slew rate	0.1 mA
Maximum supply voltage	6 V
Minimum supply voltage	2.5 V
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	NICKEL PALLADIUM GOLD
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	7.5 mm
uPs/uCs/peripheral integrated circuit type	PARALLEL IO PORT, GENERAL PURPOSE
Base Number Matches	1

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PCF8574; PCF8574A

Remote 8-bit I/O expander for I

C-bus with interrupt

Rev. 5 — 27 May 2013

Product data sheet

1. General description

The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire

bidirectional I

C-bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 100 kHz I

C-bus interface, three

hardware address inputs and interrupt output operating between 2.5 V and 6 V. The

quasi-bidirectional port can be independently assigned as an input to monitor interrupt

status or keypads, or as an output to activate indicator devices such as LEDs. System

master can read from the input port or write to the output port through a single register.

The low current consumption of 2.5

A

(typical, static) is great for mobile applications and

the latched output ports directly drive LEDs.

The PCF8574 and PCF8574A are identical, except for the different fixed portion of the

slave address. The three hardware address pins allow eight of each device to be on the

same I

C-bus, so there can be up to 16 of these I/O expanders PCF8574/74A together on

the same I

C-bus, supporting up to 128 I/Os (for example, 128 LEDs).

The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic

of the microcontroller and is activated when any input state differs from its corresponding

input port register state. It is used to indicate to the microcontroller that an input state has

changed and the device needs to be interrogated without the microcontroller continuously

polling the input register via the I

C-bus.

The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal

pull-up 100

A

current source.

2. Features and benefits



C-bus to parallel port expander



100 kHz I

C-bus interface (Standard-mode I

C-bus)



Operating supply voltage 2.5 V to 6 V with non-overvoltage tolerant I/O held to V

with 100

A

current source



8-bit remote I/O pins that default to inputs at power-up



Latched outputs directly drive LEDs



Total package sink capability of 80 mA



Active LOW open-drain interrupt output



Eight programmable slave addresses using three address pins



Low standby current (2.5

A

typical)



40 C

to +85

C

operation



ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per

JESD22-C101

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