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参数资料
| 型号： | U4479B-MFLG3 |
| 英文描述： | DVB-Cable IF Converter and Full Multi-Standard Video-/Sound IF Processing |
| 中文描述： | 的DVB -电缆中频转换器和完整的标准Video-/Sound中频处理 |
| 文件页数： | 9/11页 |
| 文件大小： | 257K |
| 代理商： | U4479B-MFLG3 |
U4479B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A2, 14-Jan-98
7 (11)
Electrical Characteristics (continued)
VS = 5 V, Tamb = +25°C
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Modulation switch (pin 16):
Control voltage for
HIGH: neg. modulation
LOW: pos. modulation
See note 6
Vmod
2.5
3.5
1.5
V
Switching current
Pin 16 to ground
Imod
30
mA
Frequency switch (Pin 17)
Control voltage for
HIGH: fVCO = 38.9 MHz
LOW: fVCO = 33.4/43 MHz
(depends on Pin 16)
see also note 6
Vfreq
3.35
3.5
3.2
V
Switching current
Pin 17 to ground
Ifreq
700
mA
Table of Switch Settings
Active IF input
IF 1 (Pins 5, 6)
IF 2 (Pins 9, 10)
IF input switch (Pin 15)
Pin 15 ‘high’
Pin 15 ‘low’
Standard
DVB
BG
L
L’
VCO frequency
43 MHz
38.9 MHz
38.9 MHz
33.4 MHz
(see note 7)
Modulation switch (Pin 16)
‘high’
‘high’
‘low’
‘low’
Frequency switch (Pin 17)
‘low’
‘high’
‘high’
‘low’
Notes
1.
This parameter is given as an application information and it is not tested during production.
2.
The oscillator drift is related to the picture carrier frequency, at external temperature-compensated LC circuit
3.
a(1.07) = 20 log (4.43 MHz component/ 1.07 MHz component);
a(1.07) value related to black-white signal
input signal conditions:
picture carrier
0 dB
color carrier
–6 dB
sound carrier
–24 dB
4.
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)
5.
Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; vin = 10 mV
6.
Without control voltage ‘High Level’ mode is automatically selected
7.
For L’: AFC is adjustable with external potentiometer
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