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參數(shù)資料
| 型號： | LA7138M |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | 0.300 INCH, MFP-24 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 320K |
| 代理商： | LA7138M |
LA7138M
No.A0220-9/16
Continued from preceding page.
Pin
No.
Pin name
I/O
Pin
voltage
Input/
Output
impedance
Function
Equivalent circuit
6
C.IN
I
4.8V
10k
Video signal input pin.
Enter the chroma signal for input of composite/S
signal. Enter the B-Y or R-Y signal for input of
the component signal input.
For input of the base band signal, enter any of
RGB signals that have a sync signal.
8
REG
O
8V
1.5k
Pin for the regulator that generates an 8V
supply voltage in IC.
To use the supply voltage of 12V, connect a
collector of the external PNP transistor (see the
test circuit A). Since the noise in IC is
dependent on the stability of regulator, it is
recommended to connect a 470
F capacitor
when the S/N ratio of –80dB is to be secured for
controls other than Y/C-MIX.
To secure the S/N ratio of –74dB for Y/C-MIX,
set the supply voltage to 8V (VCCB) and apply
8V also to this pin. (See the test circuit B.)
10
Y.IN
I
4.2V
Clamp form
Video signal input pin.
Enter the Y signal for input of composite/S and
component signal. For input of the base band
signal, enter any of RGB signals that have a
sync signal.
11
AMP.SW
I
2.4V
9.0G
Control pin to select the AMP gain according to
the input signal amplitude.
Control is possible with a microcontroller that
operates on 3.3 to 5.0V power supply as well as
through selection of VCC/GND on a substrate.
12
PNP-B-IN
O
3.4V
4.0G
Base input pin of the external PNP transistor for
the 8V regulator.
Connect to the transistor in case of the supply
voltage of 12V (see the test circuit A).
To use the supply voltage of 8V, keep this pin
open (see the test circuit B).
Continued on next page.
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