SANYO LA76810, LA76812, LA76814 Diagram
PRODUCT INFORMATION
Vol. 62
Single-Chip Color TV IC Series Developed
IC product series provides support for both low cost and global
products.
LA76810 Series
Overview
As generation after generation of color TV signal-processing IC is developed, and as rationalization
progresses in the design of these ICs, the companies that produce these ICs find themselves in a battle
not just for market share, but for their very survival. TV manufacturers, who are facing the rapid collapse of prices in consumer products, now strongly desire both support for global products and
reduced total costs in the ICs for these products. To respond to these needs, Sanyo has developed the
LA76810 Series of single-chip color TV signal-processing ICs.
To provide reduced design costs in application products, the LA76810 Series are designed to support
end products with common printed circuit boards across the product line, and also to support global
products by supporting a variety of TV standard combinations, including NTSC, PAL/NTSC, and
multi-format. To reduce total costs, these ICs are based on the concept of reducing adjustments in
external components by using an I2C bus, and furthermore aim at reducing the number of adjustments
by adopting adjustment-free technology (e.g., the IF circuit is adjustment free), and by using circuit
technologies (such as S-BPF/TRAP, DDS, and CCD) to reduce the number of components.
Additionally, these products support end product differentiation by the adoption of unique technologies, such as built-in SG circuits, demodulation ratio and demodulation angle adjustment functions,
and an AKB function.
Features
Global Product Support (Pin to Pin Structure)
There are now three formats used for color TV broadcasts: PAL, NTSC, and SECAM. Since the signal
processing required for these formats differs, it has been necessary to design printed circuit boards
using different ICs for these different signal formats. However, since the LA76810 Series ICs are
formed with a pin to pin structure as the pin arrangement, these products allow sharing of the printed
circuit board circuit constants and layout, the items that make up the customer's design know-how.
• LA76810: Multi-format support (PAL, NTSC, and SECAM)
• LA76812: PAL and NTSC support
SANYO Electric Co., Ltd. Semiconductor Business Headquarters Overseas Marketing Division
TOKYO OFFICE: Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
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PRODUCT INFORMATION
• LA76814: NTSC support
Reductions in Total Costs
• Number of external component adjustments reduced by the use of an I2C bus and by reducing the
number of on-board rheostats.
An I2C bus is used for controlling this IC, and this allows the number of adjustment points that
require trimmers on the printed circuit board to be reduced.
• Number of adjustments reduced by the adoption of adjustment-free technology.
— Adjustment-free IF (VCO and AFT circuits)
The VCO coil adjustment and the AFT coil adjustment are now handled by adjustment-free
technology.
• Number of external components reduced by the adoption of circuit technologies.
— S-TRAP, S-BPF
The sound trap and sound bandpass filter circuits, which were previously implemented using
external components, are now provided on chip.
— Horizontal oscillator element
The horizontal oscillator element, which was previously an external component, is now
provided on chip.
— Single crystal operation provided by DDS technology
The functions of the two or three crystal oscillator elements previously required for color
demodulation can now be handled by a single crystal oscillator element due to the adoption of
DDS*1 technology.
*1: DDS (direct digital synthesizer) technology allows multiple-frequency oscillations
to be implemented with the precision provided by normal crystal oscillators with a single
crystal element.
— Built-in CCD provided by multi-chip packaging (2 chips in a single package): LA76810 and
LA76812
There is now demand for built-in delay lines (CCDs) in PAL system ICs. These products
respond to this need by combining 2 chips in a single package: a bipolar chip, which focuses
on analog processing, and a CMOS chip that provides the CCD functionality.
Product Differentiation Provided by Unique Technologies
• Production rationalization provided by an on-chip signal generator.
— These are the industry’s first single-chip color TV ICs that include a built-in signal generator.
This functionality was proposed by Sanyo to achieve rationalization in the TV manufacturing
process.
• End product differentiation provided by demodulation ratio and demodulation angle adjustment
SANYO Electric Co., Ltd. Semiconductor Business Headquarters Overseas Marketing Division
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