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https://www.eeworm.com/dl/502/31023.html
单片机编程
PCA9674 PCA9674A Remote 8-bit
The PCA9674/74A is a drop-in upgrade for the PCF8574/74A providing higher Fast-modePlus I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWMdimming of LEDs, higher I2C-bus drive (30 mA versus 3 mA) so that many more devicescan be on the bus without the need fo ...
https://www.eeworm.com/dl/502/30565.html
单片机编程
PCA9674 PCA9674A—带中断的8位Fm+ I2C
The PCA9674/74A provide general purpose remote I/O expansion for most
microcontroller families via the two-line bidirectional bus (I2C-bus) and is a part of the
Fast-mode Plus (Fm+) family.
https://www.eeworm.com/dl/899351.html
技术资料
PCA9674 PCA9674A Remote 8-bit IO expander for Fm I2C-bus with interrupt
The PCA9674/74A is a drop-in upgrade for the PCF8574/74A providing higher Fast-modePlus I2C-b
https://www.eeworm.com/vipdownload/67.html
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https://www.eeworm.com/vipdownload/63.html
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