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U4454B
Quasi-Split-Sound Processing and AM-Demodulator
Description
The U4454B quasi-split-sound processor is a bipolar integrated circuit for all FM-TV standards and NICAM sound systems. For FM/NICAM the IC operates as QSS-mixer. In case of AM sound the circuit can be used as AM demodulator.
Features
D PLL intercarrier-mixer for all FM standards
(incl. NICAM sound system)
D High input sensitivity D Wide supply voltage range (6.8 V up to 13 V) D Low power consumption D ESD protection
Case: 16-pin DIL plastic
D High grade signal processing for FM/NICAM
sound systems
D Also suitable as AM-demodulator D Gain controlled wideband amplifier D AGC operates as a peak- and mean-level detector
Block Diagram
VCO Tank Loop filter
93 7653
12 Lock detector 16 IF Input 1 Video
11
8
9
VCO
90 0 Interference rejection
6
Output
Overload detector 14 3 NC +/- Lock detector AGC
+V
S
2 NC
5 IF AGC
4
15
10
7 Average
13
Figure 1.
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
1 (7)
Preliminary Information
U4454B
Pin Description
IFin NC NC GND C5 Vout C7 1 2 3 4 5 6 7 16 IFin 15 GND 14 VS 13 CRef 12 LF 11 LF 10 GND 9
95 11256
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Symbol IFin NC NC GND C5 Vout C7 VVCO VVCO GND LF LD CRef VS GND IFin
Function IF input Not connected Not connected Ground IF-AGC time constant Output for AM (audio frequency) or FM (intercarrier frequency) Averaging value (IF-AGC function) VCO circuit VCO circuit Ground PLL loop filter PLL time constant switch Reference voltage (internal use only) Supply voltage Ground IF input
VVCO 8
VVCO
Absolute Maximum Ratings
Reference point Pin 4, unless otherwise specified
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Parameters Symbol Vs IS Iout P Tj Value Unit V mA mA mW C Supply voltage Supply current Output current Maximum power dissipation Junction temperature Pin 14 Pin 14 Pin 6 6.8 to 13.0 55 5.0 720 +125
Thermal Resistance
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Parameters Junction ambient Ambient temperature Storage temperature note 1 Symbol RthJA Tamb Tstg Value 60 -25 to +85 -25 to +125 Unit K/W C C 2 (7)
Preliminary Information
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
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Vs = 8 V, Tamb = 25C, reference point Pin 4, unless otherwise stated
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96 Parameters
Electrical Characteristics
DC-supply Pin 14 Supply voltage Vs 6.8 Supply current Is IF-amplifier Pins 1-16 Input sensitivity change of output signal at Vin RMS value Pin 6: -3 dB Input impedance Rin Input capacitance Cin IF-AGC Pins 5 and 7 IF gain control range Gv 60 AGC capacitor C5 Average capacitor C7 PLL Pins 8-9, 11 and 12 see note 2 PLL capture range Dfcap VCO-tuning range Dfvco VCO-tuning sensitivity Df / Du 3.0 FM-mode: Intercarrier mixer operation Pin 6 see note 3 DC output voltage V5 = 4.5 V, vin = 0 VDC Output resistance Rout Sound IF output voltage Vin = 10 mV Vout 80 5.50 MHz output voltage Vout 35 5.74 MHz output voltage Weighted signal to noise ref. signal: vin =10 mV, kHz, ratio: (CCIR 468) fdev = fmod = 1 kHz, measured with FM demodulator U2831B, standard B/G modulated IF signal (residual carrier 10%); Black screen: 1. Channel S/N 2. Channel S/N Grid pattern: 1. Channel S/N 2. Channel S/N Grey screen 50%: S/N 1. Channel S/N 2. Channel
Test Conditions / Pins
Preliminary Information
"30
Symbol
Min.
1.5 3.0 4.5
Typ.
66 4.7 0.33
120 55
4.2 100
1.2 2
8.0 45
59 58
62 60 52 50
80
U4454B
Max.
13.0 55
180 80
120
1.0
MHz MHz kHz/mV
mVRMS mVRMS
VRMS
Unit
V mA
kW pF
dB dB
dB dB dB dB
dB F
mF
W
V
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U4454B
AA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A A A A AAAA A A A A AAAAA AAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAA A A A A AAAAA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA AAAA A A A A AAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA AAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAA A
m = 80% fmod = 40 Hz fmod = 1 kHz fmod = 12.5 kHz VDC Rout Vo,AF THD 4.2 420 560 100 750 3
Parameters AM mode: DC output voltage Output resistance AF output voltage Total harmonic distortion
Test Conditions / Pins Pin 6 V5 = 4.5 V, vin =0
Symbol
Min. see note 4
Typ.
Max.
Unit V
W
mVRMS %
Signal to noise ratio
Reference: m = 54% fmod = 1 kHz 22 kHz low pass Pin 15/Pin 7
S/N
65
dB
Ripple rejection
28
dB
Notes
Alignment of the VCO
1. When soldered to PCB 2. With: VCO-capacitor: CVCO = 22 pF; Loop filter: R1 = 150 W, C1 = 470 nF, C2 = 1.5 nF 3. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz; PC/SC1 = 13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to sync peak level 4. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%, Vin = 10 mV
1. Apply 4.5 V to Pin 5, to disable the broadband amplifier. 2. Measure the dc-voltage at Pin 11 (phase detector). 3. Apply a 38.9 MHz unmodulated carrier signal to the IF input (Pins 1-16); adjust the input level so that the AGC voltage at Pin 5 is between 2.5 V and 3.3 V. 4. Adjust the VCO circuit until Pin 11 has the same dc-voltage as measured in step 2. 5. Step 1-4 is a coarse alignment but sufficient for AMmode. For sound optimum in FM-mode adjust for the minimum buzz at critical test pattern (grid pattern) in the second sound channel.
4 (7)
Preliminary Information
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
U4454B
Typical Application Circuit
32.4 MHz + VS 22 mH 22 mF 150 W C2 R1 C1 470 nF 1.5 nF 38.9 MHz (32.4 MHz) 10 kW 38.9 MHz S1 10 nF
10 nF
15 pF 16 IF 15 14 13 12 11 10 9
L1
U4454B
12 pF TSB 5304 1 2 3 4 5 4.7 mF 6 7 1 mF 8 10 nF
10 kW 32.4 MHz 2.2 kW AF (AM) 3.3 nF SFE 5.5 MC 22 nF 22 nF
TSB 5307
SFE 5.74 MC 22 nF 22 nF
680 W
680 W
4.7 mF 14 13 12 11 10
16
15
9
U2831B
1 1k 1 nF
2
3
4
5
6
7 1 kW 22 nF 1 nF
8
3.3 kW 3.3 kW
15 nF L2 5.74 MHz
15 nF
22 mF L3 5.5 MHz
93 7654
AF2
AF1
+VS = 9 V
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
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Preliminary Information
U4454B
Dimensions in mm
Package: DIP16
94 9128
6 (7)
Preliminary Information
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
U4454B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96
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Preliminary Information

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