DataSheet.jp

LC7455A の電気的特性と機能

LC7455AのメーカーはSanyo Semicon Deviceです、この部品の機能は「Closed Caption Signal Extraction IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 LC7455A
部品説明 Closed Caption Signal Extraction IC
メーカ Sanyo Semicon Device
ロゴ Sanyo Semicon Device ロゴ 




このページの下部にプレビューとLC7455Aダウンロード(pdfファイル)リンクがあります。
Total 13 pages

No Preview Available !

LC7455A Datasheet, LC7455A PDF,ピン配置, 機能
Ordering number : EN5680
CMOS IC
LC7455A, 7455M
Closed Caption Signal Extraction IC
Overview
The LC7455A/M extracts the closed caption signal
superimposed on a video signal during the vertical return
period and, under the control of a clock signal provided by
the decoder IC, transfers that signal to the IC (usually a
microcontroller) that decodes the closed caption data. The
LC7455A/M supports four operating modes. Modes 1 and
2 can be used for XDS. In these modes, the LC7455A/M,
in combination with the decoder IC (microcontroller),
extracts the caption signal superimposed on field 2 and
uses it for NTSC VCR functions such as the automatic
time and date setting function. In modes 3 and 4, the
LC7455A/M, in combination with the decoder IC
(microcontroller), extracts the caption signal
superimposed on fields 1 and 2 and uses it for NTSC TV
applications (mode 3) or PAL TV applications (mode 4).
Functions
• Low power dissipation achieved by fabrication in a
CMOS process.
• Stable caption signal extraction achieved by a built-in
peak hold circuit and the use of digital technology.
• Operating supply voltage: 5 V ±10%
• Package LC7455A: 16-pin DIP
LC7455M: 18-pin MFP
Package Dimensions
unit: mm
3006B-DIP16
[LC7455A]
unit: mm
3095-MFP18
[LC7455M]
SANYO: DIP16
SANYO: MFP18
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
D3097HA(OT) No. 5680-1/13

1 Page





LC7455A pdf, ピン配列
System Block Diagram
LC7455A, 7455M
PLL reference clock
mode 2
mode 3, 4
mode 1
Data peak hold
(Data slice)
Pedestal clamp
Hsync peak hold
(Hsync slice)
Output control
Divided-by-
32 circuit
(Modes 1, 3, 4)
Oscillator
circuit
(Mode 2)
(Mode 2)
Data output
buffer
Operation in the Different Modes
Pin
MOD1 MOD0
Open Open
Open
VDD
VDD
VDD
Open
VDD
Mode Application
equipment
Operation
Mode 1 VCR
Mode 2 VCR
Mode 3 NTSC-TV
Mode 4 PAL-TV
· Even field line 21 data extraction
The internal PLL is operated with the horizontal synchronizing signal separated from the composite video
signal as the reference.
· Even field line 21 data extraction
An external 508 kHz ceramic oscillator is used, and the internal PLL is operated with that oscillator output
divided by 32 as the reference.
· Odd and even field line 21 data extraction
The internal PLL is operated with the Hsync signal applied from fly back as the reference.
· Odd and even field line 22 data extraction
The internal PLL is operated with the Hsync signal applied from the fly back circuit as the reference.
Note: The data extraction operations in modes 1 and 2 are identical. However, while mode 1 can operate without problem for normal "on air" signals, it may
be difficult for the PLL to lock with signals such as scrambled CATV signals.
No. 5680-3/13


3Pages


LC7455A 電子部品, 半導体
O/E and LN21 Output Timing (Modes 1, 2, and 3)
Line no.
(modes 1, 3)
Odd field
Line no.
(modes 1, 3)
Even field
Notes: O/E is output in modes 1 and 3. In mode 2 it functions as the ceramic oscillator output pin.
LN21 is output for even fields in modes 1 and 2, and for both fields in mode 3.
This pulse is only output in mode 3.
This pulse is only output in modes 1, 2, and 3.

6 Page



ページ 合計 : 13 ページ
 
PDF
ダウンロード
[ LC7455A データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
LC7455

Closed Caption Signal Extraction IC

Sanyo Semicon Device
Sanyo Semicon Device
LC7455A

Closed Caption Signal Extraction IC

Sanyo Semicon Device
Sanyo Semicon Device
LC7455M

Closed Caption Signal Extraction IC

Sanyo Semicon Device
Sanyo Semicon Device


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap