LA7945 查看數據表（PDF） - SANYO -> Panasonic

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LA7945

Closed Caption Signal (US specifications) Extraction IC

SANYO -> Panasonic 

LA7945N

• Pin 21 : The vertical synchronization separation output pin.

The signal passed to the vertical C/D from vertical synchronization separa-

tion is output from pin 21. Since vertical C/D is I2L, a signal of between 0

and 0.7V is output. This pin is normally left open. The vertical C/D start

position can be changed by an external override input.

Figure 11 : Pin 21 Peripheral Circuit

• Pin 22 : This pin determines whether or not the horizontal count for vertical C/D is changed every frame when the start bit is not detected.

When this pin is grounded, 21H is fixed, and it functions when open.

Ground this pin when captions are used.

Figure 12 : Pin 22 Peripheral Circuit

Specifications of any and all SANYO 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.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all

semiconductor products fail with some probability. It is possible that these probabilistic failures could

give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,

or that could cause damage to other property. When designing equipment, adopt safety measures so

that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective

circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products(including technical data,services) described or

contained herein are controlled under any of applicable local export control laws and regulations,

such products must not be exported without obtaining the export license from the authorities

concerned in accordance with the above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or

mechanical, including photocopying and recording, or any information storage or retrieval system,

or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to

product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"

for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not

guaranteed for volume production. SANYO believes information herein is accurate and reliable, but

no guarantees are made or implied regarding its use or any infringements of intellectual property rights

or other rights of third parties.

This catalog provides information as of January, 2001. Specifications and information herein are subject

to change without notice.

PS No.4616–9/9

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