Datasheet > PCA9551PW,112

PCA9551PW,112

更新时间： 2024-02-04 03:54:40

品牌	Logo	应用领域
恩智浦 - NXP		PC 驱动光电二极管接口集成电路
页数	文件大小	规格书
26页	169K
描述
PCA9551 - 8-bit I2C-bus LED driver with programmable blink rates TSSOP 16-Pin

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PCA9551PW,112 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	TSSOP	包装说明：	TSSOP, TSSOP16,.25
针数：	16	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.12
数据输入模式：	SERIAL	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e4
长度：	5 mm	湿度敏感等级：	1
复用显示功能：	NO	功能数量：	1
区段数：	8	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP16,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	2.5/5 V	认证状态：	Not Qualified
座面最大高度：	1.1 mm	子类别：	Display Drivers
最大供电电压：	5.5 V	最小供电电压：	2.3 V
标称供电电压：	3.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	NICKEL PALLADIUM GOLD
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	4.4 mm	最小 fmax：	0.4 MHz
Base Number Matches：	1

PCA9551PW,112 数据手册

PCA9551

8-bit I²C-bus LED driver with programmable blink rates

Rev. 08 — 31 July 2008

Product data sheet

1. General description

The PCA9551 LED blinker blinks LEDs in I²C-bus and SMBus applications where it is

necessary to limit bus trafﬁc or free up the I²C-bus master's (MCU, MPU, DSP, chip set,

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 I²C-bus and uses up one of the master's timers.

The PCA9551 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) for each individual

output. 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 100 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).

Three hardware address pins on the PCA9551 allow eight devices to operate on the same

bus.

The newer Fast-mode Plus PCA9634 8-bit LED controller offers an individual PWM

dimming control for each channel for better color mixing capabilities with a global PWM for

dimming or blinking all channels at the same time. There are 126 possible address

combinations and the maximum output sink current is 25 mA per bit and 200 mA per

package.

2. Features

I 8 LED drivers (on, off, ﬂashing at a programmable rate)

I 2 selectable, fully programmable blink rates (frequency and duty cycle) between

0.148 Hz and 38 Hz (6.74 seconds and 0.026 seconds)

I Input/outputs not used as LED drivers can be used as regular GPIOs

I Internal oscillator requires no external components

I I²C-bus interface logic compatible with SMBus

I Internal power-on reset

I Noise ﬁlter on SCL/SDA inputs

I Active LOW reset input

I 8 open-drain outputs directly drive LEDs to 25 mA

I Edge rate control on outputs

12 3 4 5 6 7...26

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PCA9551PW-T	NXP	暂无描述	获取价格
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