Stock index futures pointed to a slightly lower open on Wall Street on Tuesday, with futures for the S&P 500 down 0.1 percent, Dow Jones futures down 0.1 percent and Nasdaq 100 futures down 0.1 percent at 0733 GMT.

* Chip maker Texas Instruments Inc will be in focus after it warned of slower-than-usual quarterly sales growth as it scrambles to restart production after Japan's massive earthquake. Shares of Texas Instruments traded in Frankfurt were down 1.6 percent.

* Companies scheduled to report quarterly results on Tuesday include Goldman Sachs , Intel Corp , International Business Machines Corp , Johnson & Johnson , Yahoo Inc and CSX Corp . Economic indicators include March housing starts.

* Goldman Sachs is expected to report sharply lower quarterly earnings due to weak trading and a charge for buying back preferred stock from Warren Buffett's Berkshire Hathaway . Analysts surveyed by Thomson Reuters I/B/E/S on average expect Goldman to post first-quarter earnings of 82 cents per share, down from $5.59 a year earlier.

* Tokyo stocks hit a three-week low on Tuesday, hit by Texas Instruments' warning on the impact from Japan's earthquake and after the yen climbed on S&P's revised credit outlook for the United States. European stocks were up 0.5 percent in morning trade, rebounding from the previous session's sharp sell-off.

* Apple Inc sued Samsung Electronics <005930.KS> claiming the South Korean firm's Galaxy line of mobile phones and tablets slavishly copies the iPhone and iPad, according to court papers, a move analysts say is aimed at keeping its close rivals at bay.

* Toshiba Corp <6502.T> said on Tuesday it likely fell short of its operating profit estimate for the past business year by 4 percent after last month's massive earthquake and tsunami affected operations at some of its plants.

* Booming smartphone demand and cost cuts kept cellphone venture Sony Ericsson <6758.T> in the black in the first quarter, despite the drag of supply disruption from Japan's earthquake and tsunami.

* Wall Street fell more than 1 percent on Monday as sovereign debt fears on both sides of the Atlantic and China's monetary tightening hurt the outlook for global economic growth.

* The Dow Jones industrial average <.DJI> slid 140.24 points, or 1.14 percent, to 12,201.59. The Standard & Poor's 500 Index <.SPX> declined 14.54 points, or 1.10 percent, to 1,305.14. The Nasdaq Composite Index <.IXIC> dropped 29.27 points, or 1.06 percent, to 2,735.38.

(Reporting by Blaise Robinson; Editing by Louise Heavens)

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