收藏本站
NXP Semiconductors
PCA9635
16-bit Fm+ I 2 C-bus LED driver
8. Characteristics of the I 2 C-bus
The I 2 C-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.
8.1 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 Figure 7 ).
SDA
SCL
data line
stable;
change
of data
Fig 7.
Bit transfer
data valid
allowed
mba607
8.1.1 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 de?ned as the START condition (S). A
LOW-to-HIGH transition of the data line while the clock is HIGH is de?ned as the STOP
condition (P) (see Figure 8 ).
SDA
SCL
S
START condition
P
STOP condition
mba608
Fig 8.
De?nition of START and STOP conditions
8.2 System con?guration
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 Figure 9 ).
PCA9635_7
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 — 16 July 2009
19 of 35
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PCA9685PW,118 IC LED DRIVER RGBA 28-TSSOP
PCA9922PW,118 IC LED DRIVER LINEAR 16-TSSOP
PCA9955TW,118 IC LED DRVR CONST CURR
PCF85102C-2P/03,11 IC EEPROM 2KBIT 100KHZ 8DIP
PCF85103C-2T/00,11 IC EEPROM 2KBIT 100KHZ 8SOIC
PCF8570T/F5,512 IC SRAM 2KBIT 100KHZ 8SOIC
PCF8582C-2T/03,118 IC EEPROM 2KBIT 100KHZ 8SOIC
PCF8594C-2T/02,118 IC EEPROM 4KBIT 100KHZ 8SOIC
相关代理商/技术参数
PCA9635PW/S911-T 功能描述:LED照明驱动器 8-BIT I2C FM+TP LED CON RST OE 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
PCA9635PW112 制造商:NXP Semiconductors 功能描述:IC LED DRVR TSSOP
PCA9635PW-T 功能描述:LED照明驱动器 8BIT I2C FM+ TP LED CON RST OE 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
PCA9641BSHP 功能描述:Buffer, Multiplexer 2 Channel 16-HVQFN (3x3) 制造商:nxp semiconductors 系列:- 包装:剪切带（CT） 零件状态:有效 类型:缓冲器，多路复用器 应用:I2C 输入:2 线式总线 输出:2 线式总线 数据速率（最大值）:- 通道数:2 延迟时间:- 信号调节:- 电容 - 输入:6pF 电压 - 电源:2.3 V ~ 3.6 V 电流 - 电源:100mA 工作温度:-40°C ~ 85°C 封装/外壳:16-VFQFN 裸露焊盘 供应商器件封装:16-HVQFN（3x3） 标准包装:1
PCA9641PWJ 功能描述:Buffer, Multiplexer 2 Channel 16-TSSOP 制造商:nxp semiconductors 系列:- 包装:剪切带（CT） 零件状态:有效 类型:缓冲器，多路复用器 应用:I2C 输入:2 线式总线 输出:2 线式总线 数据速率（最大值）:- 通道数:2 延迟时间:- 信号调节:- 电容 - 输入:6pF 电压 - 电源:2.3 V ~ 3.6 V 电流 - 电源:100mA 工作温度:-40°C ~ 85°C 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:16-TSSOP 标准包装:1
PCA9646D,118 功能描述:数字总线开关 IC BUFFERED 4CH 2-WIRE BUS SW RoHS:否 制造商:Texas Instruments 开关数量:24 传播延迟时间:0.25 ns 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:TSSOP-56 封装:Reel
PCA9646PW,118 功能描述:数字总线开关 IC Buffered 4-Channel 2-Wire Bus Switch RoHS:否 制造商:Texas Instruments 开关数量:24 传播延迟时间:0.25 ns 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:TSSOP-56 封装:Reel
PCA9655EDTR2G 功能描述:接口-I/O扩展器 16-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