BA7207AK

Video ICs SECAM chroma signal processor for VHS VCRs BA7207AS / BA7207AK The BA7207AS and BA7207AK are LSI components that incorporate the contain circuitry required for SECAM chroma signal processing. The ICs have both recording and playback systems and each includes a bell filter, a bandpass filter, a limiter amplifier, a multiply-by-four circuit, a divide-by-four circuit, and a sync-gate circuit. Applications SECAM and VHS format video cassette recorders and camcorders Features 1) All filters required for SECAM chroma signal processing are provided. 2) Built-in chroma killer circuit. 3) Built-in switch circuit for selecting PAL chroma or SECAM chroma for the PB / REC system output. Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature BA7207AS BA7207AK BA7207AS BA7207AK Symbol VCC Pd Limits 7 1400 (SDIP32)∗1 850 (QFP44)∗2 – 25 ~ + 75 – 25 ~ + 65 – 55 ~ + 125 Unit V mW °C °C Topr Tstg ∗1 Reduced by 14mW for each increase in Ta of 1°C over 25°C . ∗2 When mounted on a 70mm × 70mm, t = 1.6mm glass epoxy board, reduced by 8.5W for each increase in Ta of 1°C over 25°C. Recommended operating conditions (Ta = 25°C) Parameter Operating power supply voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 Unit V 1 Video ICs BA7207AS / BA7207AK Block diagram PALRIN RECOUT BA7207AS (SDIP32) VREG TRAP ABELO CREF1 CREF2 CREF3 RECH × 4O PBIN LAIN 32 31 30 29 28 27 26 25 24 23 22 21 MODE...