UPDATE 1-Motorola, NEC win order for KDDI's LTE network

* KDDI gives no breakdown of planned $5.3 bln LTE spending

* NEC wins first telecom equipment order with KDDI

TOKYO Aug 20 (Reuters) - Motorola Inc MOT.N won from Japan's second-largest cellphone carrier KDDI Corp (9433.T) its first public order for next-generation LTE equipment, lending credence to the U.S. cellphone vendor's network.

Japan's struggling telecom equipment vendor NEC Corp (6701.T) will also help Motorola build KDDI's 500 billion yen ($5.3 billion) Long Term Evolution network, to be built by Dec. 2012, the three firms said on Thursday.

It would be the first time that KDDI, which does not give a breakdown of the orders, buys base stations from NEC. Motorola has supplied KDDI equipment for 20 years, helping to build Japan's first CDMA network.

The world's telecom carriers are lining up infrastructure vendors as they prepare to launch LTE technology, which will enable faster uploads and downloads of movies, music and other data to mobile devices.

Verizon Communications Inc (VZ.N) has said its key LTE suppliers will be Alcatel Lucent (ALCTL.IS), Nokia Siemens Networks [NOKI.UL], Ericsson (ERICb.ST) and Starent. NEC and rival Fujitsu Ltd (6702.T) plan to supply LTE equipment to Japan's largest cellphone carrier NTT DoCoMo Inc (9984.T).

KDDI, which competes with both DoCoMo and No.3 Softbank Corp (9984.T) in a saturated market, hopes to meet high-speed mobile Internet demand with its WiMax venture while DoCoMo moves ahead in LTE.

KDDI's LTE launch would come two years after DoCoMo's.

Shares of NEC closed up 0.3 percent and KDDI was up 1.4 percent, against a 1.8 percent rise in the benchmark Nikkei average .N225. ($1=94.31 Yen) (Reporting by Mayumi Negishi; Editing by Chris Gallagher and Muralikumar Anantharaman)