Datasheet > PCA8574ATS,112

PCA8574ATS,112

更新时间： 2024-01-29 11:50:33

品牌	Logo	应用领域
恩智浦 - NXP		PC 光电二极管外围集成电路
页数	文件大小	规格书
32页	1030K
描述
PCA8574/74A - Remote 8-bit I/O expander for I²C-bus with interrupt SSOP2 20-Pin

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PCA8574ATS,112 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SSOP2	包装说明：	LSSOP, SSOP20,.25
针数：	20	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.29
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e4
长度：	6.5 mm	湿度敏感等级：	1
位数：	8	I/O 线路数量：	8
端口数量：	1	端子数量：	20
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：	LSSOP
封装等效代码：	SSOP20,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, LOW 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：	1.5 mm	子类别：	Parallel IO Ports
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 (Ni/Pd/Au)	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
uPs/uCs/外围集成电路类型：	PARALLEL IO PORT, GENERAL PURPOSE	Base Number Matches：	1

PCA8574ATS,112 数据手册

PCA8574; PCA8574A

Remote 8-bit I/O expander for I²C-bus with interrupt

Rev. 3 — 3 June 2013

Product data sheet

1. General description

The PCA8574/74A provides general-purpose remote I/O expansion via the two-wire

bidirectional I²C-bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 400 kHz I²C-bus interface, three

hardware address inputs and interrupt output operating between 2.3 V and 5.5 V. The

quasi-bidirectional port can be independently assigned as an input to monitor interrupt

status or keypads, or as an output to activate indicator devices such as LEDs. The system

master can read from the input port or write to the output port through a single register.

The low current consumption of 4.5 A (typical, static) is great for mobile applications and

the latched output ports have 25 mA high current sink drive capability for directly driving

LEDs.

The PCA8574 and PCA8574A are identical, except for the different fixed portion of the

slave address. The three hardware address pins allow eight of each device to be on the

same I²C-bus, so there can be up to 16 of these I/O expanders PCA8574/74A together on

the same I²C-bus, supporting up to 128 I/Os (for example, 128 LEDs).

The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic

of the microcontroller and is activated when any input state differs from its corresponding

input port register state. It is used to indicate to the microcontroller that an input state has

changed and the device needs to be interrogated without the microcontroller continuously

polling the input register via the I²C-bus.

The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal

pull-up 100 A current source.

2. Features and benefits

 I²C-bus to parallel port expander

 400 kHz I²C-bus interface (Fast-mode I²C-bus)

 Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to V_DDwith

100 A current source

 8-bit remote I/O pins that default to inputs at power-up

 Latched outputs with 25 mA sink capability for directly driving LEDs

 Total package sink capability of 200 mA

 Active LOW open-drain interrupt output

 Eight programmable slave addresses using three address pins

 Low standby current (4.5 A typical)

 40 C to +85 C operation

12 3 4 5 6 7...32

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PCA8574D	NXP	Remote 8-bit I/O expander for I2C-bus with interrupt	获取价格
PCA8574N	NXP	Remote 8-bit I/O expander for I2C-bus with interrupt	获取价格
PCA8574N,112	NXP	PCA8574/74A - Remote 8-bit I/O expander for I	获取价格
PCA8574PW	NXP	Remote 8-bit I/O expander for I2C-bus with interrupt	获取价格
PCA8574PW,112	NXP	PCA8574/74A - Remote 8-bit I/O expander for I	获取价格
PCA8574TS	NXP	Remote 8-bit I/O expander for I2C-bus with interrupt	获取价格

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