* Renesas says no truth to report regarding talks to buy Maxim
* Deal could be valued up to $20 bln - CNBC
* Deal not imminent and may not happen - CNBC
* Maxim shares end up 12 percent on Nasdaq (Updates with statement from Renesas)
TOKYO, Jan 30 (Reuters) - Renesas Electronics Corp dismissed a media report that said the Japanese automotive chip maker was in talks to acquire U.S. chipmaker Maxim Integrated Products Inc.
Earlier, CNBC reported that discussions were ongoing for a deal that could be valued at up to $20 billion, citing sources close to the matter. The report, however, also said that the deal was not imminent and may not happen.(cnb.cx/2nrkjIe)
"There was a news report ... concerning discussions about an acquisition, but this report was not issued by us and there is no truth to it," Renesas said in a statement on Tuesday.
Maxim was not immediately available for comment.
Renesas has a market capitalisation of about $20 billion, while Maxim is valued at about $19 billion, according to Thomson Reuters data.
Shares in the San Jose, California-based company ended up 12.3 percent at $66.27 on the Nasdaq on Monday after the report.
In 2016, Renesas beat rival suitor Maxim in a deal to buy U.S. chipmaker Intersil Corp for $3.2 billion, an all-cash deal that bolstered the Japanese group's efforts to refocus the company around automotive chips.
Renesas, created from the semiconductor units of several Japanese companies, has amassed a significant war chest since a state fund and key clients bailed it out after the Fukushima earthquake in 2011. ($1 = 108.7800 yen) (Reporting by Munsif Vengattil and Diptendu Lahiri in BENGALURU, Kentaro Hamada in TOKYO; Editing by Himani Sarkar)