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參數(shù)資料
| 型號(hào)： | 935262233118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16 I/O, PIA-GENERAL PURPOSE, PDSO24 |
| 封裝： | 5.30 MM, PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 20/26頁 |
| 文件大小： | 140K |
| 代理商： | 935262233118 |
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1999 Apr 07
3
Philips Semiconductors
Product specication
Remote 16-bit I/O expander for I2C-bus
PCF8575
1
FEATURES
Operating supply voltage 2.5 to 5.5 V
Low standby current consumption of 10 A 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.
2
GENERAL DESCRIPTION
The PCF8575 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 PCF8575 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 PCF8575 is an I2C-bus slave transmitter/receiver.
Every data transmission from the PCF8575 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.
3
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
PCF8575TS
SSOP24
plastic shrink small outline package; 24 leads; body width 5.3 mm
SOT340-1
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