參數(shù)資料
型號: TA1372FNG
廠商: Toshiba Corporation
英文描述: VHF Band RF Modulator IC for VCRs and Set top boxes
中文描述: 甚高頻波段射頻調制器集成電路錄像機和機頂盒
文件頁數(shù): 3/15頁
文件大小: 190K
代理商: TA1372FNG
TA1372FNG
2003-12-25
3
Pin Description
(V
CC
=
5.0 V, Ta
=
25°C)
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purpose.
Pin
No.
(typ.)
(typ.)
Name
DC Voltage
AC Voltage
Interface equivalent circuit
Note
1
Reference
signal Mode
selection
H: 5 V
M: 2.5V
L: 0 V
Reference signal Mode can
be selected this pin.
High or Open: 4MHz
external input mode
Middle: 3.579545MHz
external input mode
Low: Internal Oscillation
Mode with 4MHz X’tal
2
Video signal
Input
2.4 V
(sync tip)
500 mV
p-p
(80%
modulation)
Sync tip clamp input. It is
used by AC coupling.
Video modulation depth is
set by level of input signal
on this pin.
White clip level for IC is set
internally for DC, but it will
change by the high
frequency-factor.
3
RF PLL loop
filter
RF oscillation frequency is
compared with RF setting
frequency(pin 8), and the
error is outputted by Charge
pump.
LPF for high frequency
rejection is connected to
this terminal. And the
voltage for RF VCO control
is generated.
The reference frequency is
62.5 kHz.
4
Analog GND
(0 V)
Analog GND
5
Sound signal
input
H: 5 V
M: 2.5V
L: 0 V
(normal
mode)
167 mV
p-p
(100% FM
modulation)
Sound modulation depth is
set by level of sound signal
input on this pin.
Sound pre-emphasis is
applied before this pin.
This pin is also used for
switching test mode.
Normally this pin is used at
0 V DC (used by AC
coupling).
H: Test mode
M: Test mode (White Clip
through mode)
L (open): Normal mode
3
A.V
CC
2
A.GND
D.V
CC
D.GND
2 k
1
1
3
A.V
CC
5
10 k
2 k
1
A.GND
1
D.V
CC
D.GND
1
10 k
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