参数资料
| 型号： | PCF8574P,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16DIP |
| 产品培训模块： | I²C Bus Fundamentals |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 25 |
| 接口： | I²C |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 100kHz |
| 电源电压： | 2.5 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-DIP |
| 包装： | 管件 |
| 包括： | POR |
| 产品目录页面： | 827 (CN2011-ZH PDF) |
| 配用： | 568-3615-ND - DEMO BOARD I2C |
| 其它名称： | 568-1075-5 933706060112 PCF8574PN |
2002 Nov 22
7
Philips Semiconductors
Product specication
Remote 8-bit I/O expander for I2C-bus
PCF8574
6
CHARACTERISTICS OF THE I2C-BUS
The I2C-bus is for 2-way, 2-line communication between
different ICs or modules. The two lines are a serial data
line (SDA) and a serial clock line (SCL). Both lines must be
connected to a positive supply via a pull-up resistor when
connected to the output stages of a device. Data transfer
may be initiated only when the bus is not busy.
6.1
Bit transfer
One data bit is transferred during each clock pulse. The
data on the SDA line must remain stable during the HIGH
period of the clock pulse as changes in the data line at this
time will be interpreted as control signals (see Fig.5).
6.2
Start and stop conditions
Both data and clock lines remain HIGH when the bus is not
busy. A HIGH-to-LOW transition of the data line, while the
clock is HIGH is defined as the start condition (S).
A LOW-to-HIGH transition of the data line while the clock
is HIGH is defined as the stop condition (P) (see Fig.6).
6.3
System conguration
A device generating a message is a ‘transmitter’, a device
receiving is the ‘receiver’. The device that controls the
message is the ‘master’ and the devices which are
controlled by the master are the ‘slaves’ (see Fig.7).
Fig.5 Bit transfer.
handbook, full pagewidth
MBC621
data line
stable;
data valid
change
of data
allowed
SDA
SCL
Fig.6 Definition of start and stop conditions.
handbook, full pagewidth
MBC622
SDA
SCL
P
STOP condition
SDA
SCL
S
START condition
Fig.7 System configuration.
MBA605
MASTER
TRANSMITTER /
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER /
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER /
RECEIVER
SDA
SCL
相关PDF资料 |
PDF描述 |
|---|---|
| PCF8574T/3,512 | IC I/O EXPANDER I2C 8B 16SOIC |
| PCA9554PW/DG,118 | IC I/O EXPANDER I2C 8B 16TSSOP |
| PCA8574D,512 | IC I/O EXPANDER I2C 8B 16SOIC |
| PCA8574AD,512 | IC I/O EXPANDER I2C 8B 16SOIC |
| PCA8574PW,112 | IC I/O EXPANDER I2C 8B 16TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCF8574PN | 制造商:NXP Semiconductors 功能描述:IC, I/O EXPANDER, 8BIT, 100KHZ, DIP-16; Chip Configuration:8bit; Bus Frequency:100kHz; IC Interface Type:I2C; Supply Voltage Min:2.5V; Supply Voltage Max:6V; Digital IC Case Style:DIP; No. of Pins:16; No. of I/O's:8 ;RoHS Compliant: Yes |
| PCF8574PW | 功能描述:接口-I/O扩展器 Remote 8-Bit I/O Expander for I2C-Bus RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCF8574PW | 制造商:Texas Instruments 功能描述:IC EXPANDER 8BIT SMD TSSOP20 |
| PCF8574PWE4 | 功能描述:接口-I/O扩展器 Remote 8-Bit I/O Expander for I2C-Bus RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCF8574PWG4 | 功能描述:接口-I/O扩展器 Remote 8-Bit I/O Expander RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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