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LC7455A

Sanyo Semicon Device
Part Number LC7455A
Manufacturer Sanyo Semicon Device
Description Closed Caption Signal Extraction IC
Published Mar 22, 2005
Detailed Description Ordering number : EN5680 CMOS IC LC7455A, 7455M Closed Caption Signal Extraction IC Overview The LC7455A/M extracts t...
Datasheet PDF File LC7455A PDF File

LC7455A
LC7455A

Overview
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).
Package Dimensions unit: mm 3006B-DIP16 [LC7455A] 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 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 LC7455A, 7455M Pin Assignments Top view Pin Functions Pin No.
Pin VSS1 TEST LN21 O/E/CFOUT HS/CFIN CPDT SCKIN CE VDD1 MOD0 CVIN VCOR MOD1 VDD2 VSS2 CP DIP16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 MFP18 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 Ground Test pin.
Must be left open during normal operation.
Line 21H pulse output (even field) Field discrimination pulse output Sync separator Hsync pulse output Ceramic oscillator output Ceramic oscillator input Line 21H pulse output (both fields) Line 22H pulse output (both fields) Mode 1 Mode2 P...


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