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INF8574

general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C)

IK Semicon Co., Ltd 

TECHNICAL DATA

GENERAL DESCRIPTION

INF8574

The INF8574 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 interface. The INF8574 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 INF8574 can remain a

simple slave device.

FEATURES

　 Operating supply voltage 2.5 to 6 V

　 Low standby current consumption of 10 　A 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 INF8574A)

　 DIP16, space-saving SO16 or SSOP20 package.

BLOCK DIAGRAM

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