Maker : Sanyo
Part No. : LA7688

  Datasheet PDF : LA7688.pdf
  Cross Reference : LA7688 Cross Reference
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Product Information

Ordering number : EN5635 Monolithic Linear IC LA7688 Single-Chip CTV Signal-Processing Circuit for PAL and NTSC Formats Overview The LA7688 integrates VIF, SIF, video, chrominance, and deflection processing circuits for PAL/NTSC format TV sets on a single chip and is provided in a 52-pin shrink package. The VIF and SIF circuits achieve semi-adjustment-free operation, and are adjustment-free except for the VCO coil and the RF AGC circuit. The chrominance circuit can be made adjustment-free by using the LC89950 1H delay line IC. All the signal processing required for a multi-format color TV can be implemented by combining this product with the LA7642 SECAM decoder IC. [OSD] [DEF] • Analog OSD • Automatic 50/60 Hz discrimination • Fixed vertical size • Double AFC • Built-in sync separator circuit [Other features] • Sandcastle pulse (for the 1H delay line) • fsc output (for SECAM systems) • Primary color output Package Dimensions unit: mm 3218-DIP52S [LA7688] Features [VIF] [SIF] [VIDEO] • PLL detector • Buzz canceller • PLL detector • Audio switch • Built-in trap • Built-in DL • Aperture control • Video switch (SVO output) • Black expansion • PAL/NT • Base band processing (adjustment free) • Built-in bandpass filter [CHROMA] SANYO: DIP52S Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Maximum supply current FBP input current FBP input voltage Allowable power dissipation Operating temperature Storage temperature Symbol V40 max V45 max I24 max I26 max I32 max I26 min Pd max Topr Tstg Ta ≤ 65°C When mounted on a printed circuit board* Conditions Ratings 9 9 16 5 10 –5 1.3 –10 to +65 –55 to +150 Unit V V mA mA mA V W °C °C Note : * Printed circuit board size: 83 × 86 × 1.5 mm, material: Bakelite Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Recommended supply current Operating voltage range Operating current range Symbol V40 V45 I24 V40 op V45 op I24 op Conditions Ratings 7.6 7.6 12 7 to 8.2 7 to 8.2 10 to 16 Unit V V mA V V mA SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 82097HA(OT) No. 5635-1/6 LA7688 Operating Characteristics at Ta = 25°C, VCC40, 45 = 7.8 V, I24 = 12 mA Parameter [Circuit Voltages and Currents] Horizontal power-supply voltage Current drain [VIF Block] RF AGC maximum voltage RF AGC minimum voltage Input sensitivity AGC range Maximum allowable input Quiescent video output voltage Synchronizing signal tip voltage Video output amplitude Black noise threshold voltage Black noise clamp voltage Output signal-to-noise ratio 1.07 MHz beat level Frequency characteristics Differential gain Differential phase Quiescent AFT voltage Maximum AFT voltage Minimum AFT voltage AFT detection sensitivity VIF input resistance VIF input capacitance APC pull-in range (U) APC pull-in range (L) VCO1 maximum variation range SIF signal level VCO1 control sensitivity [SIF Block] SIF limiting sensitivity FM detector output voltage AMR Total harmonic distortion SIF S/N FM detector range (L) FM detector range (H) FM detector output variability [INT/EXT Switching Block] AFT EXT gain AFT EXT distortion System switch I-SE System switch I-P/N System switch E-P/N System switch E-SE [Video Switching Block] Video signal input 1 DC voltage Video signal input 1 AC voltage Video signal input 2 DC voltage Video signal input 2 AC voltage SVO pin DC voltage SVO pin AC voltage V10DC V10AC V14DC V14AC V16DC V16AC 2.5 1.7 3.2 3.2 3.5 1.0 3.5 1.0 2.8 2.0 3.1 2.3 3.8 3.8 V Vp-p V Vp-p V Vp-p GAF THD AF V1TH1 V1TH2 V1TH3 V1TH4 Notes: I = INT, E = EXT P/N = PAL/NTSC SE = SECAM 0 1.7 2.9 4.1 –0.7 –0.2 0.03 +0.3 0.5 1.2 2.6 3.8 5 dB % V V V V Vi (lim) VO (FM) AMR THD S/N (SIF) WFML WFMH ∆VO 7.0 0 55 40 390 40 46 500 60 0.3 62 2.5 8.0 2.0 3.0 4.0 1.0 52 710 dBµ mVrms dB % dB MHz MHz dB V50H V50L Vi GR VIN max V8 V8tip VO VBTH VBCL S/N C/S fC DG DP V7...

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