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Ordering number: EN 5153

Monolithic Linear IC

Ordering number: EN 5153
Monolithic Linear IC
LA7685J
PAL / NTSC Single-chip Color Television Signal Processing Circuit
Overview
The LA7685J is a single-chip IC (with VIF, SIF, video, chroma, and deflection circuits built in) for use in PAL or NTSC television sets. Because the PLL+ splitting method is used in the VIF circuit, the LA7685J is suited for use in top-of-the-line small and mid-size television sets. In addition, when used in combination with the LA7640N SECAM chroma IC, the LA7685J can be used in a PAL / NTSC / SECAM multisystem set.
Features
VIF Block PLL+ splitting (for excellent image and sound quality) High-gain VIF amplifier High-speed AGC APC time constant switch built in SIF Block Simultaneous audio IN / OUT Video / audio simultaneous muting, or audio only muting also possible 1st amplifier with AGC function AV Switching Block INT / EXT AV switch
Video Block Black extension DC restoration Delay line built in Wide band: 9 MHz (with delay line shorted) Built-in double differential circuits that also enable soft tone Supports S input (for VCRs) DC transmission amount can be varied (externally adjustable) Deflection Block Adjustment-free horizontal and vertical sync Excellent anti-noise characteristics due to adoption of duplex AFC Vertical sync sensitivity can be adjusted externally Constant vertical size with no signal (constant for 60 / 50 Hz) Highly stable image during copy guard tape playback (macrovision tapes, etc.) Excellent stability against VCR skew distortion
Package Dimensions
unit : mm
3071-DIP64S
LA7685J
OSD Block Three RGB inputs RGB linear amplifier (-6 dB input: 2 V to 5 V) First blanking (also used for B input) Chroma Block ACC filter, carrier filter built in Ident detection output Killer detection output
Delay line Video EXT, audio EXT Switch conditions OFF IN D OFF EXT C ON EXT B ON IN A
SANYO : DIP64S
SANYO Electric Co., Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63095HA(II) No.5153-1 / 10
0.51min
3.2 5.0max
LA7685J
Specifications
Parameter Recommended supply voltage Recommended supply current Operating supply voltage range Operating supply current range Symbol V2 V12 I32 V2op V12op I32op Conditions Ratings 9 9 13 8 to 9.5 8 to 9.5 10 to 16 Unit V V mA V V mA
Allowable power dissipation, Pd max - W
Ambient temperature, Ta - °C
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LA7685J
BSTH BSmax Soft
IRE IRE dB
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LA7685J
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Frequency characteristics fV0V D.L.ON DC transmission amount RDC Delay line delay amount TDL1 (one level) Delay line delay amount TDL2 (two levels) Chroma Block PAL / NTSC Common Color control color residue ECmin Color contrast variable range CC Demodulation output DC VC-Y voltage Demodulation output DC VC-Y difference voltage Demodulation output Ecar carrier leakage APC pull-in range FAPC Kill output VKiOUT Chroma Block PAL Color control center ECCEN ACCM1P ACC amplitude characteristics ACCM2P B / Rp Demodulation output ratio G / Rp G / Bp Demodulation angle RBp Maximum chroma output Ech Maximum demodulation output ECmax Killer operating point EKONP PAL output Chroma Block NTSC Color control center ECEN ACCM1N ACC amplitude characteristics ACCM2N ACCP1N ACC phase characteristics ACCP2N Tint center TCEN Tint variable range Demodulation output ratio Demodulation angle Maximum demodulation output Kill operation point NTSC / SECAM output T R / BN G / BN RBN GBN ECmaxN EKONN EKONN
30 mVp-p 21.5 dB 5.8 +300 0.03 V mV Vp-p Hz V Vp-p dB dB
deg Vp-p Vp-p dB V Vp-p dB dB deg deg deg deg
Color VR : 9 V, contrast VR : 9 V
deg deg Vp-p dB V
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LA7685J
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Horizontal sync signal only Horizontal sync signal only
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LA7685J
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Parameter OSD Block Blanking pulse threshold level -Y OUT DC voltage (OSD mode) R.G.B. -IN threshold level Symbol THBL V-Y THR THG THB VR3V VG3V VB3V VR4V VG4V VB4V VR5V VG5V VB5V Conditions C-IN : color bar, B-IN : variable B-IN : 1.5 V R-IN : variable, B-IN : 1.5 V G-IN : variable, B-IN : 1.5 V B-IN : variable R, G, B-IN : 3 V min 0.6 2.4 typ 0.9 2.7 max 1.2 3.0 Unit V V
R.G.B. -Y OUT DC voltage (3 V) R.G.B. -Y OUT DC voltage (4 V) R.G.B. -Y OUT DC voltage (5 V)
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Block Diagram
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LA7685J
Sample Application Circuit
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LA7685J
LA7685J and LA7640N Connection Diagram (Reference)
Unit (resistance: , capacitance: F)
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LA7685J
This catalog provides information as of June, 1995. Specifications and information herein are subject to change without notice. PS No.5153-10 / 10