The way to confirm your assumption is to look at the different typical timing waveform charts from the data sheet for each part. I once traced hundreds of thou

The way to confirm your assumption is to look at the different typical timing waveform charts from the data sheet for each part. I once traced hundreds of thousands of dollars worth of bunk boards back to some RAM chips substituted on the basis of being a "drop in replacement" by the procurement department. The timing diagrams revealed the replacements possessed different timing characteristics. Enough so that the chips would occasionally leave the bus floating when the memory was read from the host side.