KKF8574 Datasheet, PDF (1/11 Pages) KODENSHI KOREA CORP. – silicon CMOS circuit.

TECHNICAL DATA
KKF8574
GENERAL DESCRIPTION
The KKF8574 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 KKF8574 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 KKF8574 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 KKF8574A)
　 DIP16, space-saving SO16 or SSOP20 package.
BLOCK DIAGRAM
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