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參數(shù)資料
| 型號： | PCA9550 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 2-bit I2C LED driver with programmable blink rates |
| 中文描述： | 2位I2C LED與可編程閃爍率司機 |
| 文件頁數(shù)： | 2/17頁 |
| 文件大小： | 130K |
| 代理商： | PCA9550 |
Philips Semiconductors
Product data
PCA9550
2-bit I
2
C LED driver with
programmable blink rates
2
2003 May 02
FEATURES
2 LED drivers (on, off, flashing at a programmable rate)
2 selectable, fully programmable blink rates (frequency and duty
cycle) between 0.15625 and 40 Hz (6.4 and 0.025 seconds)
Input/output not used as LED drivers can be used as regular
GPIOs
Internal oscillator requires no external components
I
2
C-bus interface logic compatible with SMBus
Internal power-on reset
Noise filter on SCL/SDA inputs
Active-LOW reset input
2 open drain outputs directly drive LEDs to 25 mA
Controlled edge rates to minimize ground bounce
No glitch on power-up
Supports hot insertion
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which
exceeds 100 mA
Packages offered: SO8, TSSOP8
DESCRIPTION
The PCA9550 LED Blinker blinks LEDs in I
2
C-bus and SMBus
applications where it is necessary to limit bus traffic or free up the
I
2
C Master’s (MCU, MPU, DSP, chipset, etc.) timer. The uniqueness
of this device is the internal oscillator with two programmable blink
rates. To blink LEDs using normal I/O Expanders like the PCF8574
or PCA9554, the bus master must send repeated commands to turn
the LED on and off. This greatly increases the amount of traffic on
the I
2
C-bus and uses up one of the master’s timers. The PCA9550
LED Blinker instead requires only the initial set up command to
program BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and
duty cycle). From then on, only one command from the bus master
is required to turn each individual open drain output ON, OFF, or to
cycle at BLINK RATE 1 or BLINK RATE 2. Maximum output sink
current is 25 mA per bit and 50 mA per package.
Any bits not used for controlling the LEDs can be used for General
Purpose Parallel Input/Output (GPIO) expansion.
The active-LOW hardware reset pin (RESET) and Power On Reset
(POR) initializes the registers to their default state, all zeroes,
causing the bits to be set HIGH (LED off).
One hardware address pin on the PCA9550 allows two devices to
operate on the same bus.
PIN CONFIGURATION
1
2
3
4
5
6
7
8
A0
LED0
LED1
V
SS
V
DD
SDA
SCL
RESET
SW00926
Figure 1. Pin configuration
PIN DESCRIPTION
PIN
NUMBER
1
SYMBOL
FUNCTION
A0
Address input 0
2
LED0
LED driver 0
3
LED1
LED driver 1
4
V
SS
RESET
Supply ground
5
Active-LOW reset input
6
SCL
Serial clock line
7
SDA
Serial data line
8
V
DD
Supply voltage
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
TOPSIDE MARK
DRAWING NUMBER
8-Pin Plastic SO
-40 to +85
°
C
-40 to +85
°
C
PCA9550D
PCA9550
SOT96-1
8-Pin Plastic TSSOP
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
I
2
C is a trademark of Philips Semiconductors Corporation.
PCA9550DP
9550
SOT505-1
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| PCA9551 | 8-bit I2C LED driver with programmable blink rates |
| PCA9552 | GT 10C 10#16 SKT RECP BOX RM |
| PCA9554 | 8-bit I2C and SMBus I/O port with interrupt |
| PCA9554A | 8-bit I2C and SMBus I/O port with interrupt |
| PCA9554AN | 8-bit I2C and SMBus I/O port with interrupt |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9550D | 功能描述:LED照明驅(qū)動器 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 |
| PCA9550D,112 | 功能描述:LED照明驅(qū)動器 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 |
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