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Sanyo - Color TV Single-Chip Signal Processor

Numéro de référence LA7674
Description Color TV Single-Chip Signal Processor
Fabricant Sanyo 
Logo Sanyo 





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LA7674 fiche technique
Ordering number : ENN4361
Monolithic Linear IC
LA7674
Color TV Single-Chip Signal Processor for NTSC Systems
(PLL Detection)
Overview
The LA7674 improves upon the black-level, horizontal-
jitter, switch-on drift performance of the single-chip
LA7672 used to date. Also a single-chip IC, the LA7674
is for color TVs based on the NTSC (National Television
System Committee) system with an on-chip circuit for all
VIF, SIF, video, chroma and deflection signal processing.
Functions and Features
[VIF]
• PLL detection (high video and audio quality)
• High-gain VIF amplifier
• High speed AGC
• On-chip APC time constant switch
[SIF]
• Simultaneous sound IN/OUT
• Video/audio simultaneous muting, or audio-only muting
possible
[Audio-visual switch]
• Internal/external audio-visual switch (VCC = 9V)
Delay line
Video external, audio external
Switch rating
OFF
IN
6.9 to 9.0V
OFF
EXT
4.7 to 6.6V
ON EXT 2.4 to 4.3V
ON IN
0 to 2.1V
[OSD]
• RGB 3 input
• RGB linear amplifier (– 6dB input: 2V to 5V)
• Fast blanking (B input combined use)
[Chroma]
• On-chip ACC filter, On-chip killer filter, Killer-circuit
hysteresis operation
• On-chip carrier filter
[Video]
• Black enhancement
• DC playback
• On-chip delay line
• Wide band width (9MHz): delay line short
• Dual rank on-chip differentiation circuit also available
for soft also
• S input supported (VCR application)
• Variable DC transmission volume available (externally
attached circuit adjustment)
[Deflection]
• Adjustment-free horizontal, vertical synchronization
• Dual AFC system with excellent anti-noise
characteristics
• External adjustment of vertical synchronization
sensitivity
• Vertical size is constant with no-signal
• Highly stable image during playback of copy protected
tapes (macro-vision tape etc.)
• High stability against VCR skew distortion
Package Dimensions
unit: mm
3128-DIP52S
[LA7674]
52
27
1 26
46.0
0.48 1.05 1.78 0.75
SANYO: DIP52S
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
71599RM (OT)/41893TS A8-9533 No. 4361-1/6

PagesPages 6
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