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参数资料
| 型号： | PCA9551BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 9/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER BLINKER 16-HVQFN |
| 产品培训模块： | LED Controllers I²C Bus Fundamentals |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | LED 闪烁器 |
| 频率： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘 |
| 供应商设备封装： | 16-HVQFN |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 844 (CN2011-ZH PDF) |
| 配用： | 568-4002-ND - DEMO BOARD I2C 568-3615-ND - DEMO BOARD I2C |
| 其它名称： | 568-3388-6 |
NXP Semiconductors
PCA9551
8-bit I 2 C-bus LED driver with programmable blink rates
SDA
SCL
MASTER
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER/
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER/
RECEIVER
I 2 C-BUS
MULTIPLEXER
SLAVE
002aaa966
Fig 9.
System con?guration
7.3 Acknowledge
The number of data bytes transferred between the START and the STOP conditions from
transmitter to receiver is not limited. Each byte of eight bits is followed by one
acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter,
whereas the master generates an extra acknowledge related clock pulse.
A slave receiver which is addressed must generate an acknowledge after the reception of
each byte. Also a master must generate an acknowledge after the reception of each byte
that has been clocked out of the slave transmitter. The device that acknowledges has to
pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable
LOW during the HIGH period of the acknowledge related clock pulse; set-up and hold
times must be taken into account.
A master receiver must signal an end of data to the transmitter by not generating an
acknowledge on the last byte that has been clocked out of the slave. In this event, the
transmitter must leave the data line HIGH to enable the master to generate a STOP
condition.
data output
by transmitter
not acknowledge
data output
by receiver
acknowledge
SCL from master
1
2
8
9
PCA9551_8
S
START
condition
Fig 10. Acknowledgement on the I 2 C-bus
clock pulse for
acknowledgement
002aaa987
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 31 July 2008
9 of 26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9551BSHP | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551BS-T | 功能描述:LED照明驱动器 8-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit I2C LED driver with programmable blink rates |
| PCA9551D,112 | 功能描述:LED照明驱动器 I2C LED BLINKER 8BIT RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| PCA9551D,118 | 功能描述:LED照明驱动器 8-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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