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MHC108

DIGITAL VCO CONTROL

AFC DETECTOR

RC VCO

VIF-PLL

VIF-AGC

TUNER AGC

SUPPLY

SIF-AGC

AUDIO PROCESSING

AND SWITCHES

NARROW-BAND

FM-PLL DEMODULATOR

SINGLE REFERENCE QSS MIXER

INTERCARRIER MIXER

AND AM DEMODULATOR

SOUND CARRIER

TRAPS

4.5 to 6.5 MHz

TAGC

CVAGC(pos)

CAGC(neg)

CBL

TOP

14 (15)

VPLL

19 (21)

9 (8)

16 (17)

15 (16)

21 (23)

4 (2)

10 (9)

11 (10)

12 (11)

18 (20)

20 (22)

2 (31)

1 (30)

(18) 17

(7) 8

(3) 5

(4) 6

external reference signal

or 4 MHz crystal

REF

AFC

AUD

CVBS

audio output

video output: 2 V (p-p)

[1.1 V (p-p) without trap]

CAF

SIOMAD

SDA

SCL

MAD

VP

CAGC

(6, 12, 13, 14, 17,

19, 25, 28, 29, 32)

13

n.c.

AGND

7 (5)

DGND

OUTPUT

PORTS

22 (24)

3 (1)

OP1

OP2

FMPLL

DEEM

AFD

sound intercarrier output

and MAD select

FM-PLL

filter

VIF-PLL

filter

de-emphasis

network

VIF2

VIF1

24 (27)

23 (26)

SIF2

SIF1

TDA9885

TDA9886

Fig.1 Block diagram.

(1) Not connected for TDA9885.

Pin numbers for TDA9885HN and TDA9886HN in parenthesis.