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参数资料
| 型号： | PCA9509AGM,125 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 2/8页 |
| 文件大小： | 0K |
| 描述： | IC I2C BUS/SMBUS REPEATER 8-XQFN |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | 568-9472-6 |
I2C-bus: The serial revolution
By replacing complex parallel interfaces with a straightforward yet powerful serial
structure, the I2C-bus revolutionized chip-to-chip communications.
Invented by NXP (Philips) more than 30 years ago, the I2C-bus uses a simple two-wire
format to carry data one bit at a time. It performs inter-chip addressing, selection,
control, and data transfer. Speeds are up to 400 kHz (Fast-mode), 1 MHz (Fast-mode
Plus), 3.4 MHz (High Speed-mode), or 5 MHz (Ultra Fast-mode).
The I2C-bus shrinks the IC footprint and leads to lower IC costs. Plus, since far fewer
copper traces are needed, it enables a smaller PCB, reduces design complexity, and
lowers system cost.
SDA
SCL
uC
A0
A1
1010A2A1A0R/W
A2
New function address
1010011 R/W
New function address
as assigned
New
function
MCU
RTC
LCD
I/O
A/D
D/A
I2C-bus devices are available in a wide range of functions. Each slave device has its own I2C-bus address, selectable using
address pins set high (1) or low (0). Information is transmitted byte by byte, and each byte is acknowledged by the receiver.
There can be multiple devices on the same bus, and more than one IC can act as master. The master role is typically played by a
microcontroller.
Parallel Interface
I2C Serial Interface
Master
Write data
Slave
SDA
SCL
transmitter
P
W
S
data
slave address
data
A
receiver
SDA
SCL
transmitter
receiver
Read data
P
R
S
data
slave address
data
A
<
n data bytes
>
last data byte
S = Start condition
R/W = read/write
A = Acknowledge
A = Not acknowledge P = Stop condition
The master always sends the clock
< n data >
bytes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9509D | 功能描述:接口-信号缓冲器、中继器 I2C LV LVL TRANSLATR RoHS:否 制造商:Texas Instruments 工作电源电压: 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:VSSOP-8 封装:Reel |
| PCA9509D,112 | 功能描述:接口-信号缓冲器、中继器 I2C LV LVL TRANSLATR RoHS:否 制造商:Texas Instruments 工作电源电压: 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:VSSOP-8 封装:Reel |
| PCA9509D,118 | 功能描述:接口-信号缓冲器、中继器 I2C LV LVL TRANSLATR RoHS:否 制造商:Texas Instruments 工作电源电压: 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:VSSOP-8 封装:Reel |
| PCA9509D,118-CUT TAPE | 制造商:NXP 功能描述:PCA9509 Series 5.5 V 400 kHz Level Translating I2C-bus/SMBus Repeater - SOIC-8 |
| PCA9509D112 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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