ROHM Semiconductor BA7207AS
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 camcordersFEATURES
● 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 CR...