Trying to use the same DDR3L devices on the TWR-LS1021A-PB board for LS1021A, but they (MT41K256M16HA-125:E) are obsoleted.
Found this one on digi-key which is the closest model (higher clock speed rating but slightly smaller package):
I think this one should work with the memory controller on LS1021A without any schematic changes from the TWR-LS1021A-PB board. But I need the confirmation from NXP experts so that I can move ahead with this DDR3L on my new board.
If there is better options please also let me know, I'd really appreciate it.