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| 型号： | PCA9550D,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER BLINKER 8-SOIC |
| 标准包装： | 2,500 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 2 |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名称： | 935272882118 PCA9550D-T PCA9550D-T-ND |
NXP Semiconductors
PCA9550
2-bit I 2 C-bus LED driver with programmable blink rates
6. Functional description
Refer to Figure 1 “Block diagram of PCA9550” .
6.1 Device address
Following a START condition, the bus master must output the address of the slave it is
accessing. The address of the PCA9550 is shown in Figure 5 . To conserve power, no
internal pull-up resistor is incorporated on the hardware selectable address pin and it must
be pulled HIGH or LOW.
slave address
1
1
0
0
0
0
A0 R/W
fixed
hardware
selectable
002aad242
Fig 5.
PCA9550 slave address
The last bit of the address byte de?nes the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
6.2 Control register
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the PCA9550, which will be stored in the Control register.
0
0
0
AI
0
B2
B1
B0
Auto-Increment flag
register address
002aad243
Reset state: 00h
Fig 6.
Control register
The lowest 3 bits are used as a pointer to determine which register will be accessed.
If the Auto-Increment (AI) ?ag is set, the three low order bits of the Control register are
automatically incremented after a read or write. This allows the user to program the
registers sequentially. The contents of these bits will rollover to ‘000’ after the last register
is accessed.
When the Auto-Increment ?ag is set (AI = 1) and a read sequence is initiated, the
sequence must start by reading a register different from the input register
(B2 B1 B0 ≠ 000).
Only the 3 least signi?cant bits are affected by the AI ?ag. Unused bits must be
programmed with zeroes.
PCA9550_5
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 October 2008
4 of 26
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相关代理商/技术参数 |
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|---|---|
| PCA9550DP | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2-bit I2C LED driver with programmable blink rates |
| PCA9550DP,118 | 功能描述:LED照明驱动器 2-BIT I2C FM OD LED 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 |
| PCA9550DP,118-CUT TAPE | 制造商:NXP 功能描述:PCA9550 Series 2-Bit I2C-Bus LED Driver w/ Programmable Blink Rates - TSSOP - 8 |
| PCA9550DP118 | 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: |
| PCA9550DP-T | 功能描述:LED照明驱动器 2-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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