21
TDA8395 (Secam Decoder)
(1) Features
Fully integrated filters
Alignment free
For use with baseband delay
(2) Description
The TDA8395 is a self-calibrating,fully integrated SECAM decoder. The IC should preferably be used
in conjunction with the PAL/NTSC decoder TDA8362 and with the switch capacitor baseband delay
circuit TDA4665. The IC incorporates HF and LF filters, a demodulator and an identification circuit
(Iuminance is not processed in this IC).
A highly stable reference frequency is required for calibration and a two-level sandcastle pulse for
blanking and burst gating.
(3) Block Diagram
BANDGAP
TUNING
TUNING
ACC
CLOCHE
FILTER
PLL
DE-
EMPHASIS
INTERFACE
CONTROL
IDENT-
IFICATION
OUTPUT
STAGE
CLOCHE
ref
PLL
ref
GND
220 nF
100 nF
V
p
TEST
CVBS
16
7
8
3
6
2
1
15
f
ref
/IDENT
SAND
9
10
–(R-Y)
–(B-Y)
TDA8395
(4) Pin Description
SYMBOL
PIN
DESCRIPTION
fp1/IDENT
1
reference frequency input/identification input
TEST
2
test output
Vp
3
positive supply voltage
n.c.
4
not connected
n.c.
5
not connected
GND
6
ground
CLOCHEref
7
Cloche reference filter
PLL ref
8
PLL reference
-(R-Y)
9
-(R-Y) output
-(B-Y)
10
-(B-Y) output
n.c.
11
not connected
n.c.
12
not connected
n.c.
13
not connected
n.c.
14
not connected
SAND
15
sandcastle pulse input
CVBS
16
video (chrominance) input
