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Description: Simple shift register IC. Clock in data and latch it to free up IO pins on your micro.
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Don’t forget to tie OE low and SRCLR bit high for everything to work properly :-) Crazy fast too. Times for shifting are in tens of nanoseconds.
The 75HC595 shift register is a great and fast way to add I/O pins to your microcontroller. It only requires 3 pins to drive it and has an unlimited number of outputs, assuming you have enough chips.