Complex sentence: Texas Instruments, who manufactured the 486SLC for Cyrix, also released its own version of the chip, the TI486SXLC which featured 8kB internal cache vs 1kB in the original Cyrix design.
Split into simpler sentences: Texas Instruments, who manufactured the 486SLC for Cyrix and also sold under its own name. Later, they also released its own version of the chip, the TI486SXLC which featured 8kB internal cache vs 1kB in the original Cyrix design.