NEC Introduces 3G Mobile Phone Chip for Rotating TFT Displays
NEC Introduces 3G Mobile Phone Chip for Rotating TFT Displays

NEC Introduces 3G Mobile Phone Chip for Rotating TFT Displays

NEC Introduces 3G Mobile Phone Chip for Rotating TFT Displays

NEC Electronics Corporation and its subsidiary in Europe, NEC Electronics (Europe) GmbH, today introduced the PD161451 bridge IC for 3G mobile handsets, a chip that facilitates development of handsets with rotating high-resolution TFT displays, leveraging the advanced technology of NEC Electronics’ Mobile CMADSTM high-speed serial interface. Recent evolutions in mobile handsets have seen increasing popularity in handset designs with rotating or revolving high resolution thin film transistor (TFT) displays. Compared to previous clamshell designs, the part that connects the display to the main body in these new phones is much narrower, necessitating different design requirements such as a significant reduction in the number of data transmission lines that cross this segment.

The PD161451 bridge IC has a number of features that help manufacturers implement high-speed serial interfaces in mobile handsets. Compared to standard parallel interfaces, the chip’s serial interface can reduce the typical number of image data transmission lines from 18 lines to 4 lines, freeing up valuable real estate in the thin passageway that connects the display to the main body of the phone. The chip itself also has smallest-in-class dimensions of 4mm x 4mm, further contributing to board space. In addition, the Mobile CMADSTM technology enables 128Mbps high-speed data transmission while reducing electromagnetic (EMI) noise by 90% and maintaining low power consumption.

The PD161451 bridge IC is designed for use in the main body of the mobile handset. When paired with one of NEC Electronics’ five LCD driver ICs (installed in the display portion), manufacturers can achieve high-speed serial transmission without modifying their existing baseband LSI or data processing unit. This serial-serial pairing is the first of its kind in the industry.

The bridge IC and driver IC convert parallel signals to serial and transmit the data to a compatible driver IC housed in the TFT LCD display panel.

“Over the past few years we have witnessed an explosion of advanced content for mobile phones such as full-motion graphics, games, and videoconferencing. At the same time there has been a proliferation in mobile handsets designs that require certain design considerations.” stated Kazumichi Aoki, General Manager, Display Systems Division, NEC Electronics. “By providing high-speed data transmission while minimizing the power consumption and EMI noise challenges faced by parallel interfaces, we hope to promote Mobile CMADSTM interface as an industry standard.”

Pricing and Availability
Samples of the PD161451 are priced at US$8.00 per unit. Pricing subject to change. Volume production is scheduled to begin January 2005. Monthly production is expected to reach 1 million units.

About the Mobile CMADSTM Interface
Mobile CMADSTM (Current Mode Advanced Differential Signaling) is an interface technology for mobile devices developed by NEC Electronics that adopts a high-speed serial interface instead of a conventional parallel interface. It employs electrical current rather than voltage swing to transmit data, achieving low power consumption and low electromagnetic (EMI) noise.

Main Specifications of PD161451

Image data transfer system: Mobile CMADSTM
(Current Mode Advanced Differential Signaling)
Signal output circuit: N-channel open-drain transistor
Mobile CMADS image data transfer rate: 128 Mbps/pair (max)
Mobile CMADS data lines: 4 lines (2 pairs) (selectable)
CMOS parallel interface bus width: 16-bit / 18-bit (selectable)
Supported resolution: QVGA to CIF
Power supply voltage: 1.5V (logic), 1.85V (CMOS interface)
Package: 4mm x 4mm 49 pins

About NEC Electronics
NEC Electronics Corporation (TSE: 6723) specializes in semiconductor products encompassing advanced technology solutions for the high-end computing and broadband networking markets, system solutions for the mobile handsets, PC peripherals, automotive and digital consumer markets, and platform solutions for a wide range of customer applications. NEC Electronics Corporation has 26 subsidiaries worldwide including NEC Electronics America, Inc. ( and NEC Electronics (Europe) GmbH ( further information, please visit the NEC Electronics home page at:

Sophie Yamamoto
Public Relations Assistant Manager
NEC Electronics Corporation

Oliver Luttgen
Market Communication
NEC Electronics (Europe) GmbH