参数资料
| 型号： | PCA8574D,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 1/32页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16SOIC |
| 标准包装： | 1,000 |
| 接口： | I²C |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 带卷 (TR) |
| 包括： | POR |
| 其它名称： | 935283485518 PCA8574D-T PCA8574D-T-ND |
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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 VDD with
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
PCA8574; PCA8574A
Remote 8-bit I/O expander for I2C-bus with interrupt
Rev. 3 — 3 June 2013
Product data sheet
相关PDF资料 |
PDF描述 |
|---|---|
| PCA8574AD,518 | IC I/O EXPANDER I2C 8B 16SOIC |
| PCA8574TS,112 | IC I/O EXPANDER I2C 8B 20SSOP |
| ATTINY861-15XZ | MCU AVR 8K FLASH 15MHZ 20-TSSOP |
| ATTINY861-15MZ | MCU AVR 8K FLASH 15MHZ 32-QFN |
| PCA8574ATS,112 | IC I/O EXPANDER I2C 8B 20SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA8574D-T | 功能描述:接口-I/O扩展器 8-BIT I2C FM QB GPIO INT PU RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA8574N | 功能描述:接口-I/O扩展器 8-BIT I2C FM QB GPIO INT PU RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA8574N,112 | 功能描述:接口-I/O扩展器 8-BIT I2C FM QB RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA8574PW | 功能描述:接口-I/O扩展器 8-BIT I2C FM QB GPIO INT PU RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA8574PW,112 | 功能描述:接口-I/O扩展器 8-BIT I2C FM QB RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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