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View Full Version : Why use a HEF4094 vs 74HC595



Johnmark
01-22-2010, 07:39 AM
I have an board that uses the HEF4094 in the same way I would use the 74HC595. Why the use of what looks like a more complicated chip which requires 4 IO lines instead of 3.

John

Franklin
01-22-2010, 11:44 AM
Which board are you talking about? Is it a stamp?

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- Stephen

Johnmark
01-22-2010, 11:49 AM
Sorry for the lack of clarity. It is a relay board and uses the HEF to IO's. I'm just curious about the design choice.

Franklin
01-22-2010, 12:14 PM
This might have been better addressed in the Sandbox forum since it has nothing to do with BasicStamps.

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- Stephen

Mike Green
01-22-2010, 12:24 PM
For a start, look at the power supply voltage allowed for the HEF4094.