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TDA4455 Datasheet(PDF) 2 Page - TEMIC Semiconductors

Part # TDA4455
Description  Multistandard VIF Amplifier and PLL Demodulator
PDF  12 Pages
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Manufacturer  TEMIC [TEMIC Semiconductors]
Direct Link  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

TDA4455 Datasheet(HTML) 2 Page - TEMIC Semiconductors

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TELEFUNKEN Semiconductors
TDA4455
Preliminary Information
Rev. A1: 08.05.1995
2 (12)
Block Diagram
90
°
0
°
Interference
rejection
Video
VCO
RO
Video
output
7
Lock
detector
B/G
L
D2MAC
VS
15
B/G
D2MAC
L
3
6
IF AGC
58
14
Average
(only L, D2MAC)
13
12
10
9
16
Loop filter
VCO Tank
11 Standard switch
Input
selector
switch
=
+
17
18
1
2
IF Input 1
4
Tuner AGC
93 7502
Tuner AGC
take over
Int. Ref
IF Input 2
Overload
detector
+/–
Pin Description
Pin
Symbol
Function
1, 2
IF input 1
3
Tuner AGC adjustment (turn
over point)
4
Delayed tuner AGC current
5, 14
Ground
6
IF AGC time constant
7
Video output
8
Video averaging for standard L
and D2MAC
Pin
Symbol
Function
9, 10
VCO circuit
11
Standard switch
12
PLL loop filter
13
PLL time constant switch
15
Supply voltage
16
Input selector switch
17, 18
IF input 2



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