ICs for TV
1
AN5819K
Sound multiplex demodulator IC for TV in the North American market
n Overview
The AN5819K is a single chip IC, which includes a
sound multiplex demodulator for Zenith TV system and
the dbx TV sound noise reduction function.
n Features
• Stereo demodulation, SAP demodulation and dbx noise
reduction are integrated into a single chip
• Enabling various kinds of adjustment and mode
changeover thanks to I
2
C bus
• Built-in input volume (I
2
C control) for interface with
intermediate frequency processing IC
n Applications
• TV and VCR for the North American market
(A licensing agreement with THAT Corporation is nec-
essary in order to use this IC with built-in dbx-TV noise
reduction function.)
n Block Diagram
SDIP028-P-0400B
Unit: mm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
19
18
17
16
15
20
21
22
23
24
25
26
27
28
26.7±0.3
8.4±0.3
10.16±0.25
3 to 15
0.3
+0.1
–0.05
4.8±0.25
1.05±0.25
3.05±0.25
1.778
0.5±0.1
0.9±0.25
8
V
CC
9 V
GND L-out R-out Stereo SAP
21
9
13 14 28 27 15 16
11
2
3
1
SDA
SCL
I
2
C
GND
22
23
20
19
18
24
12
MPX in
7 6
10 17 26 25
5 4
Pilot det. Matrix
St.PLL
LED
driver
I
2
C
decoder
Wide band
filter
Spectral
filter
L- R
demod.
Input
VCA
L+R
demod.
Stereo
filter
SAP
filter
Noise
filter
L- R
filter
L+R
filter
75 m s
de-emph.
SAP
demod.
SAP
noise
det.
dbx
wide band
dbx
de-emph. 2
dbx
spectral
dbx
de-emph. 1
SAP out
filter
(L- R)/SAP
switch
V-reg.
I-reg.