MC44BS373CAFCEVK Freescale Semiconductor, MC44BS373CAFCEVK Datasheet - Page 33

• Manufacturer Part Number: MC44BS373CAFCEVK
• Description: KIT EVAL FOR BS373CAFC 16PIN
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS373CAFCEVK

• Main Purpose: Audio Video Integration Modulator
• Utilized Ic / Part: MC44BS373CA
• Interface Type: I2C
• Operating Temperature Range: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MC44BS373CA

18.2 BiCMOS Modulator SO16NB Stereo Application
Notes:
4. Cx value depends on crystal characteristics; Cx = 27 pF on Motorola application board.
5. RF PLL loop filter components at pin 14 must be as close as possible to FCC at pin 15.
6. Supply voltage decoupling capacitors must be as close as possible to ground.
7. For a stereo application, the audio signal is already encoded in the baseband stereo encoder. It is not necessary to
8. It is possible to create a peak for the low frequencies (from 30 to 80 Hz) by adjusting the resistor of the sound loop
9. The value of the audio input series capacitor has been increased in order to have a lower cutoff frequency.
create a pre-emphasis and in this case the pre-emphasis capacitor has to be removed. Sometimes for the same
application it is useful to increase the FM deviation. To increase FM deviation, replace the original pre-emphasis
capacitor with a 100-nF capacitor. Adding this kind of value boosts the deviation and does not create a pre-emphasis.
filter. A flat response is given with a value of 5.6 KΩ but this value can be set to 4.7 KΩ. This gives a peak of about
1 dB at 40 Hz and extends the low-frequency cut-off at 28 Hz. The value of the audio input series capacitor has been
increased in order to have a lower cut-off frequency.
Note 9
LOP
220nF
Pre-em
Audio
4MHz
O
Figure 16. Proposed SO16 Package (Stereo Application Schematic)
100nF
Note 4
Note 7
SDA
1 uF
O
Cx
SCL
Note 8
3K9 to 6K2
O
MC44BS373CA Data Sheet
SCL
SDA
LOP
XTAL
GND
PREEM
AUDIO
SPLLFLT
1
2
3
4
5
6
7
8
TVOVCC
PLLFLT
16
15
14
13
12
10
TVOUT
11
9
VIDEO
GNDD
VCCD
VCCA
GND
10nF
Vcc
10nF
O
75
Video
1nF
O
Note 6
22nF
Note 5
Vcc
O
2.2k
Application Diagrams
Note 6
47nF
100nF
10nF
O
TVOUT