參數(shù)資料
型號： STV2246
元件分類： 參考電壓二極管
英文描述： Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode
中文描述： 250 的低電流運算，低反向泄露，低噪聲穩(wěn)壓二極管
文件頁數(shù)： 44/76頁
文件大?。?/td> 2157K
代理商： STV2246
STV223XD/224XC -
I2C BUS SELECTION
44/76
TUNER DELAY
SIF FEATURES AND AUDIO SWITCHES
Reg.
Addr.
(Hex)
03
Description
Bits
Data
Comments
d7 d6 d5 d4 d3 d2 d1 d0
Tuner AGC Starting
Point Adjustment
6
X
X
X
0
0
1
1
X
X
X
0
1
0
1
0
1
1
X
X
X
X
0
0
1
X
X
X
X
0
0
1
X
X
X
X
0
0
1
X
X
X
X
0
0
1
X
X
X
X
0
0
1
X
X
X
X
Min. Start point 2 mV
RMS
at PIF input.
Typ. Start point 12 mV
RMS
at PIF input.
Max. Start point 80 mV
RMS
at PIF input
50 μA/dB.
95 μA/dB.
170 μA/dB.
270 μA/dB.
Tuner AGC Gain
2
Reg.
Addr
(Hex)
Description
Bits
Data
Comments
d7 d6 d5 d4 d3 d2 d1 d0
04
Main Audio Output
2
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
0
0
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
0
1
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
0
1
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
0
1
X
X
X
0
0
1
1
X
X
X
X
X
X
X
X
0
1
X
X
X
0
1
0
1
X
X
X
X
X
X
X
X
0
1
0
0
1
X
X
X
X
X
X
X
X
X
X
X
X
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
FM/AM audio selected.
External audio selected.
MUTE selected.
Automatic control, according to sound standard.
Deemphasis at 75 μs and FM deviation at
±
25 kHz.
Deemphasis at 50 μs and FM deviation at
±
50 kHz.
Deemphasis filter bypassed.
0 = FM demodulator active.
1 = FM demodulator defeat, FM out muted.
0 = FM output selected.
1 = AM output selected.
0 = QSS and AM demod active,
1 = QSS and AM demod not active (OFF)
0 = Intercarrier filter ON
1 = Intercarrier filter OFF
Attenuation = 0 dB.
Attenuation = 78 dB.
7-bit resolution.
FM De-emphasis
Switch and FM de-
viation range con-
trol
FM demodulator
defeat
AM/FM output se-
lection
QSS and AM de-
modulator defeat
Intercarrier filter
ON/OFF
Volume Control
Attenuation,
Linear curve (dB)
Volume Control
Attenuation,
Non-linear curve
(d0 = 0, d7 = 1)
PIF VCO compen-
sation
2
1
1
1
1
05
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
Attenuation = 0 dB.
Attenuation = 78 dB.
6-bit resolution.
06
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
0
0
1
1
X
X
X
X
X
X
X
X
X
X
X
0
1
0
1
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
0 = Optimized for PIF from 33.9 to 38.9 MHz
1 = Optimized for PIF 45.75 & 58.75 MHz
6.5 MHz sound selected.
6.0 MHz sound selected.
5.5 MHz sound selected.
4.5 MHz sound selected.
0 = auto time constant.
1 = fast time constant forced.
0 = output low (0.4 V Max.).
1 = output high (4 V Min.).
0 = CVBS output enable.
1 = CVBS output muted.
0 = QSS application, intercarrier filter OFF
1 = Intercarrier application.
Sound standard
selection
2
AGC SIF time
constant (AM)
SAW filter switch
output
CVBS output
(from PIF circuit)
QSS/Inter-carrier
Application
Not to be used
1
1
1
1
1
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