Hi
What IC (or IC family) would you guys recommend for translating from a
3.3V logic level to 5V logic level? I have 3.3V logic on a DSP board and 5V CMOS logic on a connecting daughter board. It's a 16 bit bus.Thanks in advance
Steve Minshull
Hi
What IC (or IC family) would you guys recommend for translating from a
3.3V logic level to 5V logic level? I have 3.3V logic on a DSP board and 5V CMOS logic on a connecting daughter board. It's a 16 bit bus.Thanks in advance
Steve Minshull
What speed are you running the interface at?
Is each signal unidirectional?
If they are all unidirectional signals, and the 5V board has TTL compatible inputs, you don't need to do anything from the 3.3V -> 5V domain.
In the other direction, you can either use a device with 5V tolerant inputs (most of the 74AHC range) or just use a resistive divider for relatively slow signals.
If everything's high speed, then a translator may be better
Here's TI's offerings - others (Philips, Fairchild, OnSemi) make them as well
Dual supply:
Single supply:
Translating bus switches if you have bidirectional signals:
Cheers
PeteS
SN74ALVC164245 is an absurd part number, but it works fine.
John
Cheers for the help
I've found a dual supply bus translator from fairchild which should do the job.
Steve Minshull
PeteS wrote:
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