Motorola Ventures has invested in ViVOtech, a Santa Clara, Calif. maker of radio frequency chips and software that lets mobile phone users make payments with credit cards

Motorola’s investment, the amount of which was in the single-digit millions (but otherwise undisclosed), follows a financing round of about $20 million from Nokia Growth Partners, First Data Corp, and other investors earlier this year. There are numerous players in this market (see coverage).

The company has raised $52 million over the past six years, from investors including Alloy Ventures, Draper Fisher Jurvetson and First Data Corp.