Datasheet > 微控制器和处理器 > 并行 IO 端口> PCA9555HF

PCA9555HF

更新时间： 2025-07-24 05:59:47

品牌	Logo	应用领域
恩智浦 - NXP		并行IO端口微控制器和处理器外围集成电路
页数	文件大小	规格书
34页	543K
描述
16-bit I2C-bus and SMBus I/O port with interrupt

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PCA9555HF 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	QFN	包装说明：	HWQFN-24
针数：	24	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.25	Is Samacsys：	N
JESD-30 代码：	S-PQCC-N24	JESD-609代码：	e4
长度：	4 mm	湿度敏感等级：	1
位数：	16	I/O 线路数量：	16
端口数量：	2	端子数量：	24
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：	HVQCCN
封装等效代码：	LCC24,.16SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	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：	0.8 mm	子类别：	Parallel IO Port
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
端子面层：	NICKEL PALLADIUM GOLD	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	30	宽度：	4 mm
uPs/uCs/外围集成电路类型：	PARALLEL IO PORT, GENERAL PURPOSE	Base Number Matches：	1

PCA9555HF 数据手册

PCA9555

16-bit I²C-bus and SMBus I/O port with interrupt

Rev. 08 — 22 October 2009

Product data sheet

1. General description

The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel

Input/Output (GPIO) expansion for I²C-bus/SMBus applications and was developed to

enhance the NXP Semiconductors family of I²C-bus I/O expanders. The improvements

include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O

conﬁguration, and smaller packaging. I/O expanders provide a simple solution when

additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.

The PCA9555 consists of two 8-bit Conﬁguration (Input or Output selection); Input, Output

and Polarity Inversion (active HIGH or active LOW operation) registers. The system

master can enable the I/Os as either inputs or outputs by writing to the I/O conﬁguration

bits. The data for each Input or Output is kept in the corresponding Input or Output

address compatible with the PCF8575, software changes are required due to the

enhancements, and are discussed in Application Note AN469.

The PCA9555 open-drain interrupt 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. The power-on reset sets the registers to their default values

and initializes the device state machine.

Three hardware pins (A0, A1, A2) vary the ﬁxed I²C-bus address and allow up to eight

devices to share the same I²C-bus/SMBus. The ﬁxed I²C-bus address of the PCA9555 is

the same as the PCA9554, allowing up to eight of these devices in any combination to

share the same I²C-bus/SMBus.

2. Features

I Operating power supply voltage range of 2.3 V to 5.5 V

I 5 V tolerant I/Os

I Polarity Inversion register

I Active LOW interrupt output

I Low standby current

I Noise ﬁlter on SCL/SDA inputs

I No glitch on power-up

I Internal power-on reset

I 16 I/O pins which default to 16 inputs

I 0 Hz to 400 kHz clock frequency

I ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per

JESD22-A115, and 1000 V CDM per JESD22-C101

12 3 4 5 6 7...34

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与PCA9555HF相关器件

型号	品牌	获取价格	描述	数据表
PCA9555N	NXP	获取价格	16-bit I2C and SMBus I/O port with interrupt
PCA9555N	TI	获取价格	SMBus I/O Expander With Interrupt Output
PCA9555N,112	NXP	获取价格	PCA9555 - 16-bit I2C-bus and SMBus I/O port with interrupt DIP 24-Pin
PCA9555PW	NXP	获取价格	16-bit I2C and SMBus I/O port with interrupt
PCA9555PW	TI	获取价格	REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PCA9555PW	NEXPERIA	获取价格	Low-voltage 16-bit I²C-bus I/O port with inte
PCA9555PW,112	NXP	获取价格	16-bit I2C-bus and SMBus I/O port with interrupt
PCA9555PW,118	NXP	获取价格	16-bit I2C-bus and SMBus I/O port with interrupt
PCA9555PW-T	NXP	获取价格	IC 16 I/O, PIA-GENERAL PURPOSE, PDSO24, 4.40 MM, PLASTIC, MO-153, SOT355-1, TSSOP-24, Para
PCA9555PW/DG,118	NXP	获取价格	PCA9555 - 16-bit I2C-bus and SMBus I/O port with interrupt TSSOP2 24-Pin

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