Ordering number : EN5680

D3097HA(OT) No. 5680-1/13

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

unit: mm

3095-MFP18

SANYO: DIP16

[LC7455A]

SANYO: MFP18

[LC7455M]

LC7455A, 7455M

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

Closed Caption Signal Extraction IC

CMOS IC