PCF8575CTS数据手册恩XP中文资料规格书

描述 Description

The device is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I²C-bus).
The device consists of a 16-bit quasi-bidirectional port and an I²C-bus interface. The PCF8575C 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 device is an I²C-bus slave transmitter/receiver.
Every data transmission from the PCF8575C must consist of an even number of bytes, the first byte will be referred to as P07 to P00 and the second byte as P17 to P10. The third will be referred to as P07 to P00 and so on.

特性 Features

Operating supply voltage from 4.5 to 5.5 V
Low standby current consumption of 10 µA maximum
I²C-bus to parallel port expander
400 kbits/s FAST I²C-bus
Open-drain interrupt output
16-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
SSOP24 package.