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参数资料
| 型号： | PCF8574 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Remote 8-bit I/O expander for I2C-bus |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT |
| 文件页数： | 3/24页 |
| 文件大小： | 156K |
| 代理商： | PCF8574 |
1997 Apr 02
3
Philips Semiconductors
Product specification
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
1
FEATURES
Operating supply voltage 2.5 to 6 V
Low standby current consumption of 10
μ
A maximum
I
2
C to parallel port expander
Open-drain interrupt output
8-bit remote I/O port for the I
2
C-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 PCF8574A)
DIP16, or space-saving SO16 or SSOP20 packages.
2
GENERAL DESCRIPTION
The PCF8574 is a silicon CMOS circuit. It provides general
purpose remote I/O expansion for most microcontroller
families via the two-line bidirectional bus (I
2
C).
The device consists of an 8-bit quasi-bidirectional port and
an I
2
C-bus interface. The PCF8574 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 I
2
C-bus. This means that
the PCF8574 can remain a simple slave device.
The PCF8574 and PCF8574A versions differ only in their
slave address as shown in Fig.9.
3
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
PCF8574P;
PCF8574AP
PCF8574T;
PCF8574AT
PCF8574TS
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-1
SO16
plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCF8574_02 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Remote 8-bit I/O expander for I2C-bus |
| PCF8574_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574_08 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574_10 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574A | 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE 8BIT I/O EXPANDER FOR I2C BUS |
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