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TDA4454 Datasheet(PDF) 2 Page - TEMIC Semiconductors

Part # TDA4454
Description  Multistandard VIF Amplifier and PLL Demodulator
PDF  11 Pages
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Manufacturer  TEMIC [TEMIC Semiconductors]
Direct Link  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

TDA4454 Datasheet(HTML) 2 Page - TEMIC Semiconductors

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TELEFUNKEN Semiconductors
TDA4454
Preliminary Information
Rev. A1: 04.05.1995
2 (11)
Block Diagram
=
9
°
0
°
Interference
rejection
Video
VCO
Video
output
Lock
detector
B/G
L
D2MAC
Overload
detector
+ VS
L
+/ –
IF AGC
Average
( only L, D2MAC )
9
Loop filter
VCO Tank
Standard switch
+
1
4
Tuner AGC
Tuner AGC
take over
16
IF input
2
5
415
7
14
6
RO
10
8
11
12
93 7633
Int. Ref
13
B/G
D2MAC
Pin Description
Pin
Symbol
Function
1, 16
IF input
2
Tuner AGC adjustment
(turn over point)
3
Delayed tuner AGC current
4, 15
Ground
5
IF AGC time constant
6
Video output
7
Video averaging for standard L
and D2MAC
Pin
Symbol
Function
8, 9
VCO circuit
10
Standard switch
11
PLL loop filter
12
PLL time constant switch
13
Reference voltage
14
Supply voltage



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