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PCA9554CBS

更新时间： 2024-02-19 21:04:47
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
36页 2481K
描述
Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up

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PCA9554CBS 技术参数

生命周期：ObsoleteReach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.64Is Samacsys：N
JESD-30 代码：X-XUUC-NI/O 线路数量：8
端口数量：1最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：DIE封装形状：UNSPECIFIED
封装形式：UNCASED CHIP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 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子形式：NO LEAD
端子位置：UPPERuPs/uCs/外围集成电路类型：PARALLEL IO PORT, GENERAL PURPOSE
Base Number Matches：1

PCA9554CBS 数据手册

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PCA9554B; PCA9554C  
Low-voltage 8-bit I2C-bus and SMBus low power I/O port with  
interrupt, weak pull-up  
Rev. 1 — 19 September 2012  
Product data sheet  
1. General description  
The PCA9554B and PCA9554C are low-voltage 8-bit General Purpose Input/Output  
(GPIO) expanders with interrupt for I2C-bus/SMBus applications. The only difference  
between the PCA9554B and PCA9554C is their I2C fixed address allowing a larger  
number of the same device on the I2C-bus with no chance of address conflict. NXP I/O  
expanders provide a simple solution when additional I/Os are needed while keeping  
interconnections to a minimum, for example, in ACPI power switches, sensors,  
push buttons, LEDs, fan control, etc.  
In addition to providing a flexible set of GPIOs, the wide VDD range of 1.65 V to 5.5 V allow  
the PCA9554B/PCA9554C to interface with next-generation microprocessors and  
microcontrollers where supply levels are dropping down to conserve power.  
The PCA9554B/PCA9554C contain a register set of 8-bit Configuration, Input, Output,  
and Polarity Inversion registers.  
The PCA9554B is a pin-to-pin replacement for the PCA9554, while the PCA9554C  
replaces the PCA9554A. Both of these devices replace other industry-standard part  
numbers. More fully-featured parts PCAL9554B and PCAL9554C are also available with  
Agile I/O features. See the respective data sheet for more details.  
The PCA9554B/PCA9554C open-drain interrupt (INT) output is activated when any input  
state differs from its corresponding Input Port register state and is used to indicate to the  
system master that an input state has changed.  
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt  
signal on this line, the remote I/O can inform the microcontroller if there is incoming data  
on its ports without having to communicate via the I2C-bus. Thus, the  
PCA9554B/PCA9554C can remain a simple slave device.  
The device outputs have 25 mA sink capabilities for directly driving LEDs while consuming  
low device current.  
The power-on reset sets the registers to their default values and initializes the device state  
machine.  
Three hardware pins (A0, A1, A2) select the fixed I2C-bus address and allow up to eight  
devices to share the same I2C-bus/SMBus. The PCA9554B and PCA9554C differ only in  
their base I2C-bus addresses permitting a total of 16 devices on the I2C-bus, minimizing  
the chance for address conflict, even in the most complex system.  
1234567...36

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