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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 chro-

ma signal processing. The ICs have both recording and playback systems and each includes a bell filter, a band-

pass filter, a limiter amplifier, a multiply-by-four circuit, a divide-by-four circuit, and a sync-gate circuit.

鈥?/div>

ApplicationsVHS format video cassette recorders and

SECAM and

camcorders

鈥?/div>

Features required for SECAM chroma signal pro-

1) All filters

cessing 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.

鈥?/div>

Absolute maximum ratings (Ta = 25擄C)

Parameter

Power supply voltage

Power dissipation

Operating temperature

Storage temperature

BA7207AS

BA7207AK

BA7207AS

BA7207AK

Symbol

V

CC

Pd

Limits

7

1400 (SDIP32)

鈭?/div>

1

850 (QFP44)

鈭?/div>

2

鈥?25 ~ + 75

鈥?25 ~ + 65

鈥?55 ~ + 125

Unit

V

mW

擄C

Topr

Tstg

鈭?/div>

1 Reduced by 14mW for each increase in Ta of 1擄C over 25擄C .

鈭?/div>

2 When mounted on a 70mm

脳

70mm, t = 1.6mm glass epoxy board, reduced by 8.5W for each

increase in Ta of 1擄C over 25擄C.

鈥?/div>

Recommended operating conditions (Ta = 25擄C)

Parameter

Operating power supply voltage

Symbol

V

CC

Min.

4.5

Typ.

5.0

Max.

5.5

Unit

V

1

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BA7207AS Datasheet

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