Datasheet > KKF8574AN

KKF8574AN

更新时间： 2024-01-12 14:11:10

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KKF8574AN 技术参数

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

12 3 4 5 6 7...11

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