Dollar selling against major currencies was driven by computer portfolios, according to one London-based trader.
The yen also pushed higher versus the euro, which fell nearly 1 percent to 141.05 yen. The euro touched a low of 140.48 yen, its lowest level in six weeks.
The euro was down slightly against the dollar at $1.3649, staying above a one-month trough of $1.3548 hit on Thursday.
(Read more: Could currency wars make a comeback in 2014?)
Volumes were high in the Australian dollar, which has been weak against the U.S. dollar in recent months after comments by the central bank governor saying he would prefer to see the local dollar lower. The Aussie hit a one-month high of US$0.9077 and was last at US$0.9054, up 0.6 percent.
The New Zealand dollar touched an eight-week high of US$0.8387, and was last at US$0.8356, up 0.7 percent.
The Canadian dollar headed back towards its lowest in more than four years against the greenback after data showed the country unexpectedly shed jobs last month. The loonie, which fell in every session last week against its U.S. peer, last stood at C$1.0869 per dollar. The U.S. dollar had scaled a peak of C$1.0944 on Friday, the greenback's strongest level since October 2009.