The go-to chip for mass-produced giveaway drives due to its low unit cost. Industrial Storage:
Supports a wide range of NAND Flash, specifically optimized for Toshiba TLC (e.g., TC58NVG7T2JTA00) and eD3 memory modules.
If you have a drive labeled "PS2268" that stops working, it is almost certainly the PS2251-68 chip. Here is why they fail.