NS PC97338

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NS PC87338/PC97338

This is a National Semiconductor SuperIO chip

The PC87338 and PC97338 are different chips but are functionally very similar, and both types are found in Thinkpads. Other similar types may be found in those Thinkpads listed below under this category. For example the 560X has the PC87306 chip.

Note: National Semiconductor sold the SuperIO product line to Winbond Electronics


  • Serial (16550A compatible)
  • Parallel (IEEE P1284-A, EPP, ECP, bidirectional)
  • Floppy
  • IrDA 1.1
  • PS/2 keyboard/mouse

Linux support

This chipset is supported by recent 2.4 and 2.6 kernels

IrDA function is not enabled on the X20, X21 or any i Series ThinkPads other than the i1720/1721



ThinkPads this chip may be found in