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Part: LC7455A
Category:
Analog & Mixed-Signal Processing
Description: Closed Caption Signal Extraction ic
Company: Sanyo Semiconductor Corporation
Datasheet: Download LC7455A datasheet File size : 107 kB
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Datasheet text preview:
Ordering number : ENN5680A
CMOS IC
LC7455A/M
U.S. Closed Caption Signal Extraction IC
Overview
The LC7455A/M receives the composite video signal from V/C (Video Chroma) signal processor and extracts the closed caption data with several signals from the decoder IC or microcomputer, are then sent to the decoder IC.
Features
(1) Low power consumption due to CMOS process (2) Accurate caption signal extraction using a built-in peak hold circuit and digital technology. (3) Power Requirement : 5Vą 10% (4) Package LC7455A : DIP16 LC7455M : MFP18
Ver.1.01 N1494
D2700 RM (IM) Ohta No.5680-1/11
LC7455A/M
Pin Assignment
DIP16
1 VSS1 2 TEST 3 LN21 4 O/E/CFOUT 5 HS/CFIN 6 CPDT 7 SCKIN 8 CE CP 16 VSS2 15 VDD2 14 MOD1 13 VCOR 12 6 CPDT CVIN 11 MOD0 10 VDD1 9 7 SCKIN 8 CE 9 NC CVIN 13 MOD0 12 VDD1 11 NC 10 1 VSS1 2 TEST 3 LN21 4 O/E/CFOUT 5 HS/CFIN
MFP18
CP 18 VSS2 17 VDD2 16 MOD1 15 VCOR 14
LC7455A
LC7455M
Pin Description
Terminal VSS1 TEST LN21 O/ E /CFOUT
HS /CFIN CPDT SCKIN CE VDD1 MOD0 CVIN VCOR MOD1
Pin No Function Description DIP16 MFP18 MODE1 MODE2 Negative power supply for digital circuit 1 1 Test pin, Leave open in operation 2 2 Line 21H pulse output (Even field) 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 4 5 6 7 8 11 12 13 14 15 16 17 18
Field determination output
Hsync output
MODE3
CF oscillation output terminal CF oscillation input terminal
Line 21H pulse output (Both field) Field determination output
Hsync input
Caption data output (Nch open drain) Input for Caption-data-transmission clock Chip select input Positive power supply for digital circuit leave open connect to VDD1 Composite video input Built-in VCO frequency control leave open leave open Positive power supply for analog circuit Negative power supply for analog circuit Built-in PLL filter pin leave open
connect to VDD1
VDD2 VSS2 CP
* VDD1,VSS1are the power supply terminals for built-in digital circuit. And VDD2,VSS2 are the power supply terminals for built-in analog circuit. Connect like following figure to reduce the noise influence.
LC7455A/M Power supply VDD1 VSS1 VDD2
VSS2
No.5680-2/11
LC7455A/M
Package Dimension (unit : mm)
3006B
SANYO : DIP-16
(unit : mm)
3095
SANYO : MFP-18
No.5680-3/11
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