
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
'sproductsor
equipment.
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.
62508 MS JK/ O2500TN (KT)/8088YT, TS No.2873–1/4
LA7853
Overview
The LA7853 is a sync deflection circuit IC dedicated to CRT display use. It can be connected to the LA7832, 7833, 7837,
7838 (for vertical output use) to form a sync deflection circuit that meets every requirement for CRT display use.
So far, ICs for color TV use have been applied to the sync deflection circuit for CRT display use and general-purpose ICs
such as one-shot multivibrator, inverter and a lot of transistors have been used to form the peripherals such as sync input
interface, horizontal phase shifter. The LA7853 contains these peripherals on chip and adopts a stable circuit
for horizontal oscillation from 15kHz to 100kHz aiming at improving the characteristics requierd for CRT dispaly use.
The LA7853 has independent GND pins for the horizontal block and vertical block, thus facilitating pattern layout for
applications where the LA7853 is used at high frequencies.
Features
The vertical pull-in range is approximately 20Hz, 2 times that of the LA7852, at fV = 60Hz.
The horizontal oscillation frequency can be adjusted stably from 15kHz to 100kHz.
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.
Good vertical linearity because DC bias at vertical output stage is subject to sampling control within retrace time.
Excellent interlace and vertical jitter characteristics on the high-definition display because of independent GND pins for
the horizontal block and vertical block.
Functions
[Horizontal Block]
[Vertical Block]
AFC
Vertical OSC
Horizontal OSC
Vertical sawtooth wave generator
X-ray protector
Sampling type DC voltage control
Horizontal phase shift
AFC sawtooth wave generator
Horizontal pulse duty setting
Monolithic Linear IC
CRT Display Synchronization
Deflection Circuit
Ordering number : EN2873A