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BH7800K

Single chip Hi-Fi audio signal processor

ROHM Semiconductor 

Video ICs

BH7800K

•Electrical characteristics (unless otherwise noted, Ta = 25°, UNREG – Vcc = + 10V, UNREG – VEE = – 10V)

• Output switch control (W1bit5, W1bit4, W1bit3)

• BS L2 Through / LINE MUTE control (W1bit2, W1bit1)

• LINE AMP gain control (W1bit7, W1bit6)

• FM output cotrol (W5bit5)

• FM OUT switch control (W2bit4, W2bit3, W2bit2)

• NTSC / PAL control (W2bit0)

• Recording MUTE (W2bit1)

• Hi-Fi MUTE (W1bit0)

• Normal input switch control (W3bit4, W3bit3)

• Hi-Fi ALC control (W3bit0)

• ENVELOPE GAIN (Typ. / + 4dB / + 6dB) control (W4bit4, W4bit3) )

• FM detector level control (W4bit7, W4bit6)

• ENVE characteristic control (W4bit5)

• DAC TEST control (W4bit2)

• MUTE control (pin 32)

: STEREO

: BSL2 Through / LINE MUTE OFF

: Typ. (+ 9.8dB)

: FM OUTPUT ON

: FM REC output, MIX ratio 1 (-12.5dB)

: NTSC

: Recording MUTE

: OFF

: Hi-Fi MIX

: OFF

: Typ.

: Typ.

: FNORM detect, no ENVE output

: OFF

: L (MUTE)

Signal frequency f = 1kHz

• INPUT condition 1: TU / BS / LINE1 / LINE2 VIN = – 20dBV

• INPUT condition 2: TU / BS / LINE1 / LINE2 VIN = – 9.8dBV

• INPUT condition 3: TU / BS / LINE1 / LINE2 VIN = – 5.0dBV

MODEM carrier frequency NTSC Lch

1.30MHz

MODEM carrier frequency NTSC Rch 1.70MHz

MODEM carrier frequency PAL

Lch

1.40MHz

MODEM carrier frequency PAL

Rch 1.80MHz

fsc

NTSC

3.579545MHz

fsc

PAL

4.433619MHz

6

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