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74HC574 VS 74HC595 Answered

Can anyone help me understand when you would use one over the other? I am reading the spec sheets and I am not understanding the difference. I am gathering parts for two different projects. One is making an 8X8X8 LED Cube and the other is making a plaque using 8X8 matrix cubes. The plaque will have 11each of 8x8 matrix cubes red and 4each of 8x8 matrix cubes that are RGB. Thank you in advance for your help.

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user
iceng (author)2014-02-21

The 574 is a parallel input parallel output register that can be changed to a serial by externally wiring the output to the next input. The 574 changes the LEDs as it shifts

While the 595 is a true serial double latched register that can sink or source more current then its counter part.

The 595 can squirt data out at slow or fast speed and when ready transfer the data to your LED matrix and because the double buffering it can drive LEDs without messing up shift data.

A

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user
reckerd (author)iceng2014-02-24

Thank you for the response. Sounds like I need to use the 595.

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user
iceng (author)reckerd2014-02-24

Right decision this ible shows how to wire three 595s together

https://www.instructables.com/id/Make-a-24X6-LED-ma...

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