NEC Corp. said Monday it has agreed with three U.S. semiconductor manufacturers to jointly develop Quad Data Rate static random access memories, high-speed memory chips for network equipment.

The three U.S. companies involved in the deal are Cypress Semiconductor Corp., IDT Inc. and Micron Technology Inc., NEC said in a press release.

The high-speed memory chips are the multisourced standard for high-performance memories in switches, routers and other applications needing to operate at data rates above 200 MHz. They have more than double the data transmission capability of existing chips, NEC said.