PCF8574T datasheet, PDF - EEWORLD Datasheet

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PCF8574T: Description8 I/O, PIA-GENERAL PURPOSE, PDSO16, 7.50 MM, PLASTIC, MS-013, SOT-162-1, SO-16; CategoryThe embedded processor and controller Microcontrollers and processors; File Size273KB，44 Pages; ManufacturerNXP; Websitehttps://www.nxp.com; Environmental Compliance

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PCF8574T Overview

8 I/O, PIA-GENERAL PURPOSE, PDSO16, 7.50 MM, PLASTIC, MS-013, SOT-162-1, SO-16

PCF8574T Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	NXP
Parts packaging code	SOIC
package instruction	SOP, SOP16,.4
Contacts	16
Reach Compliance Code	compliant
ECCN code	EAR99
maximum clock frequency	0.1 MHz
External data bus width	1
JESD-30 code	R-PDSO-G16
length	10.3 mm
Humidity sensitivity level	2
Number of digits	8
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
Encapsulate equivalent code	SOP16,.4
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
power supply	3/5 V
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 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

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AN469

C/SMBus general purpose I/O expanders

Rev. 02 — 20 January 2005

Application note

Document information

Info

Keywords

Abstract

Content

I2C-bus, I/O expander, GPIO, EEPROM

One of the more common functions of the I

C-bus is to provide additional

I/O port capability for a controller without increasing the number of pins on

the controller package. Philips Semiconductors offers many different

versions of I

C I/O port expanders. The following is a selection guide that

provides the designer with an overview of the similarities and important

differences of selecting the best port expander for the job.

Philips Semiconductors

AN469

C/SMBus general purpose I/O expanders

1. Introduction

1.1 Family overview

The Philips family of I

C/SMBus General Purpose parallel Input/Output (GPIO) devices

provides a simple solution for application requiring more I/Os.

About 20 different devices can be chosen from two sub-families, commonly called ‘quasi

bi-directional General Purpose I/Os’ and ‘totem-pole General Purpose I/Os’. Devices can

be chosen with 4-bit, 8-bit or 16-bit width. Additional features (not available on all the

devices) are active-LOW Interrupt output, active-LOW Reset input, programmable I

address pins and low power consumption. Finally, some devices come with additional

functions (EEPROM, DIP switch) providing integrated and price attractive combination

solutions.

Quasi bi-directional GPIOs use a push-pull I/O port with an internal weak current-source

pull-up to keep the port HIGH since the upper transistor is on for only

⁄

clock cycle.

Totem-pole GPIOs use a configuration register that programs an I/O port as either an

input or output.

Devices with a Reset input pin (RESET) can be set to a known default state by a master

device when, for instance, an ‘I

C-bus hung’ situation occurs, thus allowing the master to

take control of the bus without having to cycle power to the device.

Devices with an Interrupt output pin (INT) are able to provide an ‘input change’ status to a

master device anytime an I/O used as an input changes its logic state.

Programmable I

C address pins allow more than one device in the same I

C-bus without

any address conflicts.

Low power consumption GPIOs are attractive for portable applications or in general any

application where current consumption is a key parameter.

The following is a selection guide that provides the designers and engineers with an

overview of the similarities and important differences, allowing them to select the best port

expander for the job. Even though important technical details are explained in this

application note, the reader is encouraged to thoroughly review the data sheets for

specific information on the device.

1.2 Applications

•

Keypad and switch control

ACPI power switch, relays, timer

LED control

Signal monitoring

Sensors, fan control

9397 750 14523

Application note

Rev. 02 — 20 January 2005

3 of 44

PCF8574T Related Products

	PCF8574T	PCF8574AT-T	PCF8574T-T	PCF8574ATS	PCF8574TS-T
Description	8 I/O, PIA-GENERAL PURPOSE, PDSO16, 7.50 MM, PLASTIC, MS-013, SOT-162-1, SO-16	IC 8 I/O, PIA-GENERAL PURPOSE, PDSO16, Parallel IO Port	IC 8 I/O, PIA-GENERAL PURPOSE, PDSO16, Parallel IO Port	IC 8 I/O, PIA-GENERAL PURPOSE, PDSO20, 4.40 MM, PLASTIC, MO-152, SOT-266-1, SSOP-20, Parallel IO Port	IC 8 I/O, PIA-GENERAL PURPOSE, PDSO20, Parallel IO Port
Maker	NXP	NXP	NXP	NXP	NXP
package instruction	SOP, SOP16,.4	SOP,	SOP,	4.40 MM, PLASTIC, MO-152, SOT-266-1, SSOP-20	LSSOP,
Reach Compliance Code	compliant	unknown	unknown	compliant	unknown
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99
JESD-30 code	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G20	R-PDSO-G20
length	10.3 mm	10.3 mm	10.3 mm	6.5 mm	6.5 mm
Number of I/O lines	8	8	8	8	8
Number of ports	1	1	1	1	1
Number of terminals	16	16	16	20	20
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SOP	SOP	LSSOP	LSSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	2.65 mm	2.65 mm	2.65 mm	1.5 mm	1.5 mm
Maximum supply voltage	6 V	6 V	6 V	6 V	6 V
Minimum supply voltage	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V
Nominal supply voltage	5 V	5 V	5 V	5 V	5 V
surface mount	YES	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	1.27 mm	1.27 mm	1.27 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL
width	7.5 mm	7.5 mm	7.5 mm	4.4 mm	4.4 mm
uPs/uCs/peripheral integrated circuit type	PARALLEL IO PORT, GENERAL PURPOSE	PARALLEL IO PORT, GENERAL PURPOSE	PARALLEL IO PORT, GENERAL PURPOSE	PARALLEL IO PORT, GENERAL PURPOSE	PARALLEL IO PORT, GENERAL PURPOSE
maximum clock frequency	0.1 MHz	0.1 MHz	0.1 MHz	-	0.1 MHz
External data bus width	1	1	1	-	1
Maximum slew rate	0.1 mA	0.1 mA	0.1 mA	-	0.1 mA

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