LA75503V is a PAL completely unadjusted VIF / SIF signal processing IC for TV / VTR.
Supports IF frequencies of 38MHz, 38.9MHz, and 39.5MHz. It also supports PAL voice multi-system (M / N, B / G, I, D / K).
Built-in voice carrier TRAP and voice carrier BPF. Adopt 4MHz for the reference frequency of the non-adjustment circuit Or, VCO, AFT, and audio FILTER are controlled by external input.

Features
• Built-in VCO non-adjustment circuit, no need to adjust VCO coil
• The built-in voice BPF and TRAP make it possible to easily and inexpensively configure a PAL voice multi-system.
• Significant reduction in the number of peripheral parts.
• Clears the problem of AFT tolerance by adopting digital AFT.
• Package SSOP30 (275mil)

Function
• VIF amplifier
• VCO unadjusted PLL detection circuit
• Digital AFT circuit
• RF AGC
• Buzz canceller
• Equalizer amplifier
•   Built-in voice carrier BPF
    Built-in voice carrier trap
• PLL-FM detection circuit
• Reference signal oscillation circuit