TDA4474 Datasheet, PDF (3/17 Pages) TEMIC Semiconductors – Multistandard Video-IF and Quasi Parallel Sound Processing

TELEFUNKEN Semiconductors
Pin Description
V_{i,SIF1 1}
30 ^Vi,SIF2
V_{i,SIF1 2}
29 ^Vi,SIF2
V_SW 3
28 R_comp
GND 4
27 V_o,AM
C_AGC 5
V_i,VIF1 6
V_i,VIF1 7
C_{AGC 8}
26 V_o,FM
25 VS
24 V_AFC
23 VVCO
GND ⁹
22 ^VVCO
V_i,VIF2 10
21 _VSW
V_i,VIF2 11
20 LF
R_top 12
19 C_Ref
I_tun 13
18 GND
V_o,vid 14
17 C_BL
V_SW(stand.) 15
16 _VSW(L’)
94 8680
Figure 2. Pin description
TDA4474
Á^Pin
1, 2
3
4
Symbol
ÁÁ_Vi,SIF1
Á_VSW
ÁGND
Function
ÁÁ _{SIF1 input (symmetrical)}
ÁÁÁÁÁÁ _{SIF input selector switch}
ÁÁ Á Á Ground
Á⁵
6, 7
8
9
10 11
12
13
C_AGC
ÁÁVi,VIF1
C_AGC
Á_GND
Á_{Vi VIF2}
Á_Rtop
Á_Itun
SIF–AGC (time constant)
VIF1 input (symmetrical)
ÁÁÁÁÁÁÁ _{VIF AGC (time constant)}
ÁÁÁÁÁÁÁ _Ground
ÁÁ_{VIF2 input (symmetrical)}
ÁÁÁÁÁÁÁ _{Take over point, tuner AGC}
ÁÁÁÁÁÁÁ _{Tuner AGC output current}
14
V_{o vid} Video output
ÁÁÁÁ¹⁵
16
17
18
19
20
21
22, 23
ÁÁÁÁ^VSW
V_SW
C_BL
GND
C_Ref
LF
Á^VSW
V_VCO
Standard switch
L’–/VIF input selector switch
ÁÁÁÁÁÁÁ _{Capacitor – black level detector}
ÁÁ ÁÁÁÁÁ _Ground
ÁÁ_{Internal reference voltage}
ÁÁÁÁ ÁÁ _{Loop filter}
ÁÁÁ _{AFC switch}
VCO circuit
ÁÁ²⁴
25
26
27
28
29, 30
ÁÁÁÁVAFC
V_S
V_{o FM}
V_{o AM}
R_comp
V_i,SIF2
AFC output
Supply voltage
ÁÁÁÁ _{Intercarrier output}
ÁÁÁÁÁ _{AF output – AM sound}
ÁÁÁÁÁÁ _{Offset compensation}
ÁÁÁÁÁ _{SIF2 input (symmetrical)}
Rev. A1: 17.08.1995
Preliminary Information
3 (17)