HomedatasheetPCF8574

PCF8574 Datasheet

REMOTE 8-BIT I/O EXPANDER FOR I2C BUS for I2C-bus
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Description

The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C). The device consists of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCF8574 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus. This means that the PCF8574 can remain a simple slave device. PCF8574 Features · Operating supply voltage 2.5 to 6 V· Low standby current consumption of 10 mA maximum· I2C to parallel port expander· Open-drain interrupt output· 8-bit remote I/O port for the I2C-bus· Compatible with most microcontrollers· Latched outputs with high current drive capability for directly driving LEDs· Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A)· DIP16, or space-saving SO16 or SSOP20 packages
Features

Parameters

[{"Name":"Supply Voltage VDD","Value":"-0.5 to +7.0V"},{"Name":"input voltage VI","Value":"VSS-0.5 to VDD + 0.5 V"},{"Name":"input voltage VI","Value":"±20 mA"},{"Name":"DC output current IO","Value":"±25 mA"},{"Name":"supply current IDD","Value":"±100 mA"},{"Name":"supply current ISS","Value":"±100 mA"},{"Name":"total power dissipation Ptot","Value":"400 mW"},{"Name":"power dissipation per output PO","Value":"100 mW"},{"Name":"storage temperature Tstg","Value":"-65 to +150 °C"},{"Name":"operating ambient temperature Tamb","Value":"-40 to +85 °C"}]

Manufacturer information

DIODES INCORPORATED

Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.
Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.
Diodes’ corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California. Design, marketing, and engineering centers are located in Plano; Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facilities are located in Manchester and Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; and Munich, Germany, with support offices throughout the world.

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