Why use a HEF4094 vs 74HC595

[Johnmark]

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]

Which board are you talking about? Is it a stamp?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
- Stephen

[Johnmark]

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]

This might have been better addressed in the Sandbox forum since it has nothing to do with BasicStamps.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
- Stephen

[Mike Green]

For a start, look at the power supply voltage allowed for the HEF4094.