- 71 -
IC BLOCK DIAGRAM & DESCRIPTION
IC801 TDA9874AH(NICAM STEREO)
41 (37)
4 (42)
18 (13)
23 (19)
33 (29)
34 (30)
P1
P2
ADDR1
ADDR2
SCL
SDA
INDENTIFICATION
FM/AM
DEMODULATION
20 (15)
XTALI
19 (14)
XTALO
38 (34)
SYSCLK
CLOCK
PEAK
DETECTION
35 (31)
SDO
36 (32)
WS
37 (33)
SCK
26 (22)
TEST1
21 (17)
TEST2
16 (11)
TP1
14 (9)
TP2
(16)
TP3
TEST
27 (23)
SIF2
SIF1
29 (25)
INPUT SWITCH
AGC, ADC
NICAM
DEMODULATION
DEMATRIX
NICAM
DECODER
2-CHANNEL
ANALOG/
SATELLITE
DECODER
LEVEL
ADJUST
DIGITAL
SELECTOR
POST FILTER
3 DAC
S
ANALOG
CROSSBAR
SWITCH
MONO
CHANNEL
OUTPUT
BUFFERS
2-CHANNEL
OUTPUT
BUFFERS
5 (43)
OUTM
7 (1)
8 (2)
OUTL OUTR
(21) 25
DEC
SUPPLY
SIF
I C-BUS
INTERFACE
2
I C-BUS
INTERFACE
2
V
(20) 24
SSA2
V
(28) 32
DDA3
V
(27) 31
SSA3
V
(24) 28
ref1
V
(18) 22
ref
I
(10) 15
NICAM
(12) 17
PCLK
(7) 13
SSD2
V
(6) 12
DDD1
V
(5) 11
SSD1
V
(35) 39
DDD3
V
(36) 40
SSD3
V
(26) 30
CRESET
DIGITAL
SUPPLY
SUPPLY
DAC
S
OPAMPS
REFERENCE
(3) 9
DDA1
V
(4) 10
SSA1
V
(44) 6
SSA4
V
(41) 3
ref2
V
(39) 1
EXTIR
(40) 2
EXTIL
(38) 42
MONOIN
TDA9874APS
(TDA9874AH)