Ordering number : EN3314A
Monolithic Linear IC
LA7858
For Very High Resolution CRT
Display Synchronization
Overview
The LA7858 is sync·deflection circuit IC dedicated to CRT display use. They can be connected to the LA7838 (for vertical
output use) to form a sync·deflection circuit that meets every requirement for CRT display use.
The LA7858 is performance-improved versions of the existing LA7853. The LA7858 is intended for use in very
high-definition display (fH = 64 to 150kHz) applications. When the horizontal frequency exceeds approximately 64kHz,
problems are experienced with horizontal jitter which has been less of a problem in low-frequency display applications.
The newly developed LA7858, which are fabricated with a special production process, are capable of suppressing
horizontal jitter components successfully (30% reduced as compared with our existing similar Type Nos.). The LA7858 is
ideally suited for use in high performance-required applications.
The LA7858 is pin-compatible with the LA7853, respectively. The LA7858 is different in the vertical sync pull-in range
(LA7858 : 20Hz).
Features
• The horizontal oscillation frequency can be adjusted stably from 15kHz to 150kHz.
• The horizontal display can be shifted right/left.
• The horizontal/vertical sync input can be used intact regardless of the difference in pulse polarity and pulse width.
• The AFC feedback sawtooth wave can be obtained by simply applying a flyback pulse to the IC as a trigger pulse.
• Any duty of the horizontal pulse can be set.
• The LA7858 can be connected to the LA7838 to develop pictures with the interlace characteristics, crossover distortion
characteristics improved.
Functions
[Horizontal Block]
• Horizontal sync input
• Horizontal phase shift
• AFC sawtooth wave generator
• Horizontal pulse duty setting
• Horizontal OSC
• AFC
• X-ray protector
[Vertical Block]
• Vertical trigger input
• Vertical OSC
• Vertical sawtooth wave generator
• Sampling type DC voltage control
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
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customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
61808 MS JK/3010TA, TS No.3314-1/8
