Commenting on its figures (see page five), Texas Instruments Inc says that growth in its chip business in the US was relatively stable throughout 1987 as distributors and end-equipment manufacturers maintained tight control on inventories, but that demand in Europe was sluggish, while market conditions in Japan improved and the rest of the Asia-Pacific region continued its strong growth: he 1987 financial performance of this segment reflects the stronger world semiconductor market as orders, shipments, backlog, and profitability improved substantially from 1986, the company says, adding that the chip business also benefitted from the Buy Foreign initiative in Japan that resulted, in part, from the US-Japan semiconductor pact.