Interfacing TTL and CMOS logic

[tomg]

x> Hi there,
> 
> I'm back to this list with a slightly off-topic question.
> 
> I need to drive a logic CMOS IC from a TTL source (actually a port of a
> 8051).
> The power supply of the TTL source is +5V, while the CMOS IC is +15V.


LM311

-tg