CMOS And TTL: A Level Shifting Cautionary Tale Comparison ... There are many choices available to you including a whole host of dedicated level shifter devices such as these ones from TI, but ...
The chip’s address and data buses connect to a Pi’s GPIO header, and the only other thing to note is a 74LS541 TTL level shifter that converts the Pi’s 3.3V output to the PROM’s 5V TTL level.
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