The PCF8574 device is an 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. It provides general-purpose remote I/O expansion for most micro-controller …
【正点原子STM32】IIC-IO扩展实验（PCF8574（IO扩展芯片）I²C总线接口的8位并行I/O端口扩展器、PCF8574 …
Mar 9, 2024 · 【正点原子STM32】IIC-IO扩展实验（PCF8574（IO扩展芯片）I²C总线接口的8位并行I/O端口扩展器、PCF8574寻址、写/读操作时序、中断引脚、PCF8574驱动步骤） 原创 于 2024-03 …
PCF8574 数据表、产品信息和支持 | 德州仪器 TI.com.cn
PCF8574 器件通过 I2C 接口 [串行时钟 (SCL)、串行数据 (SDA)] 为大多数微控制器系列提供通用远程 I/O 扩展。 该器件具有一个 8 位准双向 I/O 端口 (P0–P7)，其中包括具有高电流驱动能力的锁存输出， …
详解PCF8574 I/O扩展芯片I2C驱动原理与实现-开发者社区-阿里云
Dec 19, 2023 · 本文详细阐述PCF8574 I/O扩展芯片的原理与驱动方法，覆盖I2C通信、地址配置及准双向端口等核心知识，助您通过代码实践，高效扩展嵌入式项目的GPIO资源。
The PCF8574 and PCF8574A are functionally the same, but have a different fixed portion (A6 to A3) of the slave address. This allows eight of the PCF8574 and eight of the PCF8574A to be on the same …
PCF8574 Datasheet (PDF) - NXP Semiconductors
The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus).
芯片简介之PCF8574 - CSDN博客
Oct 31, 2025 · PCF8574是一款由NXP生产的IIC协议IO扩展芯片，具备8个可独立配置的输入/输出口，并可通过地址管脚扩展至128个IO口。 该芯片支持中断功能，当输入状态与寄存器状态不匹配时会触发 …
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O 扩展器 datasheet (Rev
The PCF8574 device is an 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. It provides general-purpose remote I/O expansion for most micro-controller …
PCF8574T 产品信息 | NXP Semiconductors
The PCF8574/74A 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, 100 kHz …
PCF8574 data sheet, product information and support | TI.com
TI’s PCF8574 is a 8-bit 2.5- to 5.5-V I2C/SMBus I/O expander with interrupt. Find parameters, ordering and quality information