** Shares of chip designer Silicon Laboratories SLAB.O jumps 32.6% to $181.15 premarket
** Chipmaker Texas Instruments TXN.O in advance talks to buy SLAB for about $7 bln, source tells Reuters
** Shares of TXN down 3.2%.
** TXN and SLAB did not immediately respond to Reuters' requests for comment
** Potential deal comes as chipmakers benefit from surge in demand from technology companies ramping up compute infrastructure to power their AI ambitions
** Deal could be announced in coming days, source says
** If finalized, it would be TXN's biggest acquisition in over a decade
** As of last close, SLAB up 5.2% in past year, TXN down 7.4%
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))