PCF8574 I2C总线远程8位I/O扩展器
PCF8574是一款硅CMOS电路。通过两路双向总线(I²C总线)为大多数微控制器系列提供通用远程I/O扩展。
器件由8位准双向端口和I²C总线接口组成。PCF8574具有低电流消耗且包含具备高电流驱动能力的锁存输出,用于直接驱动LED。还具有中断线路(INT),可连接至微控制器的中断逻辑。通过在此线路发送中断信号,远程I/O可通知微控制器其端口上是否存在输入数据而无需通过I²C总线通信。这表示PCF8574依然是简单的从器件。
产品特点 Features
- 工作电源电压为2.5至6 V
- 最大10 uA的低待机电流消耗
- I²C总线至并行端口扩展器
- 开漏中断输出
- I²C总线的8位远程I/O端口
- 兼容大多数微控制器
- 带有高电流驱动能力的锁存输出,用于直接驱动LED
- 通过3个硬件地址引脚寻址,最多可使用8个器件(PCF8574A最多为16个)
- DIP16、省空间SO16或SSOP20封装。
|
应用
- LED signs and displays
- Servers
- Key pads
- Industrial control
- Medical equipment
- PLC
- Cellular telephones
- Mobile devices
- Gaming machines
- Instrumentation and test measurement
功能框图
|
封装
型号 |
可订购的器件编号 |
订购码 (12NC) |
产品状态 |
封装 |
PCF8574AT/3 |
9352 755 81512 |
PCF8574AT/3,512 |
量产 |
SO16
(SOT162-1) |
PCF8574AT/3 |
9352 755 81518 |
PCF8574AT/3,518 |
量产 |
SO16
(SOT162-1) |
PCF8574ATS/3 |
9352 765 44118 |
PCF8574ATS/3,118 |
量产 |
SSOP20
(SOT266-1) |
PCF8574T/3 |
9352 756 17512 |
PCF8574T/3,512 |
量产 |
SO16
(SOT162-1) |
PCF8574T/3 |
9352 756 17518 |
PCF8574T/3,518 |
量产 |
SO16
(SOT162-1) |
PCF8574TS/3 |
9352 756 72118 |
PCF8574TS/3,118 |
量产 |
SSOP20
(SOT266-1) |
PCF8574TS/3 |
9352 756 72112 |
PCF8574TS/3,112 |
量产 |
SSOP20
(SOT266-1) |
订货和供应
型号 |
订购码 (12NC) |
可订购的器件编号 |
化学成分 |
PCF8574AT/3 |
9352 755 81512 |
PCF8574AT/3,512 |
PCF8574AT/3 |
PCF8574AT/3 |
9352 755 81518 |
PCF8574AT/3,518 |
PCF8574AT/3 |
PCF8574ATS/3 |
9352 765 44118 |
PCF8574ATS/3,118 |
PCF8574ATS/3 |
PCF8574T/3 |
9352 756 17512 |
PCF8574T/3,512 |
PCF8574T/3 |
PCF8574T/3 |
9352 756 17518 |
PCF8574T/3,518 |
PCF8574T/3 |
PCF8574TS/3 |
9352 756 72118 |
PCF8574TS/3,118 |
PCF8574TS/3 |
PCF8574TS/3 |
9352 756 72112 |
PCF8574TS/3,112 |
PCF8574TS/3 |
PCF8574 技术支持
档案名称 |
标题 |
类型 |
格式 |
PCF8574 |
Level shifting techniques in I2C-bus design |
Data sheet |
pdf |
AN10441 |
Level shifting techniques in I2C-bus design
|
Application note |
pdf |
AN255 |
I2C / SMBus Repeaters, Hubs and Expanders
|
Application note |
pdf |
AN10710 |
Features and applications of the PCF8574 I2C-bus extender
|
Application note |
pdf |
75016527 |
Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCF8574 in a proven application
|
Brochure |
pdf |
75016532 |
Extend the I2C-bus with advanced repeaters and hubs; NXP 2-channel I2C-bus repeaters PCF8574x and 5-channel I2C-bus hubs PCA9516x
|
Leaflet |
pdf |
75016080 |
Extend the reach of any I2C-bus system without special offset voltage levels; NXP I2C-bus extender PCF8574
|
Leaflet |
pdf |
75017424 |
NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns
|
Leaflet |
pdf |
UM10204 |
I2C-bus specification and user manual
|
User manual |
pdf |
UM10206 |
I2C Demonstration Board 2005-1 Quick Start Guide
|
User manual |
pdf |
UM10323 |
PCA9600 demonstration board OM6293
|
User manual |
pdf |