Re: Are 8255s operating at 3.3V available?

Hello Jonathan,

I need to interface a SLIC & Audio Codec to implement a VoIP based
system.The SoC chip doesnt provide enough GPIO pins to interface with
the SLIC/Codec hence I am forced to use a 8255 to increase the GPIOs of
the chip.

Since this interface is interrupt driven, timing is not an issue. The
estimated no of I/Os required is 15. I did search Maxim/Microchip for
their port expanders but wasnt able to locate one.

The packaging of the chip is not at all an issue for my design.

Rgds,
VSP

.

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