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| 型號(hào)： | PCA9550D |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | 2-bit I2C-bus LED driver with programmable blink rates |
| 封裝： | PCA9550D<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,;PCA9550D<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,; |
| 文件頁(yè)數(shù)： | 24/26頁(yè) |
| 文件大小： | 150K |
| 代理商： | PCA9550D |
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PCA9550_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 October 2008
7 of 26
NXP Semiconductors
PCA9550
2-bit I2C-bus LED driver with programmable blink rates
6.4 Pins used as GPIOs
LED pins not used to control LEDs can be used as General Purpose Input/Outputs
(GPIOs).
For use as input, set LEDn to high-impedance (01) and then read the pin state via the
Input register.
For use as output, connect external pull-up resistor to the pin and size it according to the
DC recommended operating characteristics. LEDn output pin is HIGH when the output is
programmed as high-impedance, and LOW when the output is programmed LOW through
the LED selector register (LS0). The output can be pulse-width controlled when PWM0 or
PWM1 are used.
6.5 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the PCA9550 in
a reset condition until VDD has reached VPOR. At that point, the reset condition is released
and the PCA9550 registers are initialized to their default states, all the outputs in the
OFF state. Thereafter, VDD must be lowered below 0.2 V to reset the device.
6.6 External RESET
A reset can be accomplished by holding the RESET pin LOW for a minimum of tw(rst). The
PCA9550 registers and I2C-bus state machine will be held in their default states until the
RESET input is once again HIGH.
This input requires a pull-up resistor to VDD if no active connection is used.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCA9550DP | 2-bit I2C-bus LED driver with programmable blink rates |
| PCA9551BS | 8-bit I2C-bus LED driver with programmable blink rates |
| PCA9551D | 8-bit I2C-bus LED driver with programmable blink rates |
| PCA9551PW | 8-bit I2C-bus LED driver with programmable blink rates |
| PCA9552BS | 16-bit I2C-bus LED driver with programmable blink rates |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9550D,112 | 功能描述:LED照明驅(qū)動(dòng)器 2-BIT I2C FM OD LED RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| PCA9550D,118 | 功能描述:LED照明驅(qū)動(dòng)器 2-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| PCA9550D112 | 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 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-bit I2C LED driver with programmable blink rates |
| PCA9550DP,118 | 功能描述:LED照明驅(qū)動(dòng)器 2-BIT I2C FM OD LED RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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