NXP Semiconductors
PCA9551
8-bit I 2 C-bus LED driver with programmable blink rates
protocol
START
condition
(S)
t SU;STA
bit 7
MSB
(A7)
t LOW
t H IG H
bit 6
(A6)
1 /f
SCL
bit 0
(R/W)
acknowledge
(A)
STOP
condition
(P)
SCL
SDA
t BUF
t r
t f
t HD;STA
t SU;DAT
t HD;DAT
t VD;DAT
t VD;ACK
t SU;STO
002aab175
Rise and fall times refer to V IL and V IH .
Fig 21. I 2 C-bus timing diagram
12. Test information
V DD
open
PULSE
GENERATOR
V I
V DD
DUT
V O
RL
500 ?
V SS
RT
CL
50 pF
002aab880
R L = load resistor for LEDn. R L for SDA and SCL > 1 k ? (3 mA or less current).
C L = load capacitance includes jig and probe capacitance.
R T = termination resistance should be equal to the output impedance Z o of the pulse generators.
Fig 22. Test circuitry for switching times
PCA9551_8
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 31 July 2008
17 of 26
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相关代理商/技术参数
PCA9551BS118 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:
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
PCA9551D-T 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit I2C-bus LED driver with programmable blink rates
PCA9551PW 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