High volume production of video encoders for portable audio devices

Tokyo Japan – July 26, 2011 – Oki Semiconductor, one of the ROHM Group companies, has developed a video encoder “ML86V76580,” which is the smallest in the world and has lower power consumption, corresponding to two worldwide video signal systems (NTSC and PAL) ^(*1). The company has already started shipping samples of the new product and started mass production with an initial monthly volume of 100,000 parts in July 2011.

The composite video signals ^(*2) of the NTSC and PAL systems are the most popular analog video signals in the world currently, and they are indispensable as interfaces for connection of video devices. In recent years, video output functions have increasingly been installed in portable video devices, portable video-game consoles, and portable audio devices with video display functions, and, as their interfaces, composite video signals are used. Therefore, lower-power-consumption and space-saving video encoders corresponding to composite video signal outputs are needed for the video outputs of portable devices.
“ML86V76580” to be released this time has specialized in correspondence to composite video outputs, based on the high-quality and high-reliability video encoding technology that has been developed in the markets of consumer and in-vehicle devices for many years. “ML86V76580” is equipped with a connection detection function that operates only when it is connected to video devices, and, therefore, it enables the power consumption of portable devices to be reduced. In addition, for “ML86V76580,” Oki Semiconductor has adopted WCSP ^(*3), an ultra-compact package that is the smallest in the world (according to the research by OKI Semiconductor). This helps reduce the mounting space of this product. The power consumption of “ML86V76580” is 178mW, half that of our conventional compact video encoder “MSM7652,” and its package size is 2.76mm×2.50mm, a tenth of that of the conventional product.
Oki Semiconductor has prepared TQFP package products corresponding to temperature expansion (-40 to +85°C). The products can be used not only for consumer devices but also for in-vehicle, and security devices.

Oki Semiconductor is planning to expand the lineup of high-value-added video encoder series and to develop and put on the market attractive products best suitable to the customers' systems.

Corresponding to two world-standard video signal systems

Usable for video devices used worldwide because of the product’s correspondence to NTSC and PAL composite video signal outputs

Simple input/output interface

Corresponding to the digital video signal, ITU-R BT.656, or corresponding to 8-bit YCbCr multiple and synchronizing signal (interlace) inputs and to analog video signal and composite video signal 1ch outputs

Corresponding to four types of pixel frequencies

Corresponding to four types of pixel frequencies ^(*6): world-standard ITU-R BT.601 (13.5MHz), NTSC square pixel frequency (12.272727MHz) ^(*4), PAL square pixel frequency (14.75MHz), and NTSC 4fsc (14.31818MHz) ^(*5)

Equipped with a function of video device connection detection

Monitoring of the built-in DAC output voltage enables connection to a video device to be detected, and the result of the detection is stored in a status register. In addition, the status of the connection can be checked from an external microcomputer.

Connectable directly to a video device because no dedicated low-pass filter IC is necessary

Double-speed and high-speed sampling enables folding noise to be reduced and an external low-pass filter IC to be unnecessary, which helps reduce the number of needed components.

Two types of packages available according to different purposes

25-pin W-CSP (2.76mm×2.5mm), an ultra-compact package, is available for portable devices, and highly-reliable 48-pin TQFP (7mm×7mm) for in-vehicle and security devices.

• Product name: ML86V76580
• Sample shipment: Currently being supplied
• Sample price: 500 yen (excluding tax)
• Product launch: July 2011

• Video systems to be handled: NTSC, NTSC (7.5IRE setup), and PAL-BDGHI
• Video scanning method to be handled:
  Corresponding to interlace (NTSC and PAL) signals
• Input data format
  ITU-R BT.656-4 type (YCbCr 4:2:2 8-bit multiplexing with synchronizing signal information added)
  YCbCr 4:2:2 + synchronizing signal (8-bit multiplexing without synchronization signal information)
• Input signal frequency (sampling frequency)
  NTSC Square Pixel 24.545454MHz (12.272727MHz)
  NTSC/PAL ITU-R BT.601 27MHz (13.5MHz)
  NTSC 4fsc 28.63636MHz (14.31818MHz)
  PAL Square Pixel 29.5MHz (14.75MHz)
• Analog video signal output: Composite video signal
• I²C-bus serial interface: Slave address 88h (1000_100x)
• Built-in 10-bit DAC
• Power-supply voltage:
  DVDDIO 3.3V or 1.8V, DVDDCO 1.8V, and AVDD 3.3V
• Package:
  25-pin WCSP-BGA (2.76mm×2.50mm)
  48-pin TQFP (7mm×7mm)

*1: NTSC system = Analog TV signal used mainly in North America, Japan, and South Korea

*1: PAL system = Analog TV signal used mainly in Europe and China

*2: Composite vide signal

This is a general video signal in which a luminance signal, chrominance signal, and a synchronizing signal were superimposed.
It is available for almost all video devices, and a yellow RCA connector is used for the signal.

*3: W-CSP (Wafer level Chip Size Package)

This is a technique to package all in a bundle in the form of a wafer. With this technique, an LSI package can be miniaturized to absolutely the same external dimension as a chip.

*4: Square pixel

Sampling a video signal at a square pixel frequency enables square image data to be obtained. Therefore, an image to be displayed on a liquid crystal display or a PC display can be used as it is with no horizontal-to-vertical ratio conversion. A square pixel frequency is one of pixel frequencies useful in image processing.

*5: NTSC 4fsc

Sampling a video signal at a frequency four times higher than the color subcarrier frequency (fsc)　enables color components to be reproduced accurately.

*6: Pixel frequency

This is a sampling frequency of one pixel when a video signal is digitally converted.
Sampling an NTSC signal at a frequency of 13.5MHz enables data of 858 pixels (effective pixels: 720) for one horizontal line to be obtained.

*Names of companies and products are the trademarks or registered trademarks of the respective companies and organizations.