TDA4453 データシートの表示（PDF） - Temic Semiconductors
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TDA4453 Datasheet PDF : 7 Pages
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TDA4453
Pin Description
Pin
Function
1,16 IF-input
2 Standard switch: open B/G
ground L
3,15 Ground
4 IF-AGC storage capacitor
5 AGC (tuner control)
6 Tuner AGC take over
Pin
Function
7 Not connected
8,9 Demodulator circuit
10 Average capacitor standard L
11 Video output
12 Not connected
13 Supply voltage
14 Not connected
Circuit Description
The following function units are integrated in this circuit
combination for video-IF processing:
D Three symmetric, highly stable, gain controlled wide-
band amplifier, quasi galvanic coupling eliminates
feed back
D Video carrier controlled demodulator of high linearity
D Polarity switch over for video
D Video output amplifier with low-pass characteristics,
limiter for ultra black and inverter for ultra white
interference
D High impedance, interference free controlled voltage
facilities, best possible AGC time constant with small
storage capacitor
D Controlled discharge circuit for fast gain control
D With VTR - operation the video output level is
according to the ultra white level in B/G, ultra black
level in L
Absolute Maximum Ratings
Reference point Pin 3, unless otherwise specified
Parameters
Symbol
Value
Unit
Supply voltage
Pin 13
VS
10 to 13.5
V
Supply current
Pin 13
IS
65
mA
Open loop voltage
Pin 5
V5
VS
V
External voltage
Pin 4
V4
10
V
Pin 11
V11
8
Breaking current for VTR operation
Pin 4
I4
0.3
mA
Video output current
Max. load
Short circuit max 1 s
Pin 11
IO
Pin 11
5
mA
30
Power dissipation
Junction temperature
Ambient temperature range
Storage temperature range
Tamb ≤ 60°C
Ptot
1.0
W
Tj
125
°C
Tamb
–25 to +70
°C
Tstg
–25 to +125
°C
Thermal Resistance
Junction ambient
Parameters
Symbol
RthJA
Maximum
60
Unit
K/W
2 (7)
TELEFUNKEN Semiconductors
Rev. A1, 15-Aug-96
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