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LA72914V-TLM-H Datasheet(PDF) 5 Page - ON Semiconductor

Part No. LA72914V-TLM-H
Description  FM Modulator and Demodulator IC
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LA72914V
No.A1859-5/9
Pin Description
Pin No.
Pin Name
Description
Equivalent circuit
1
FM OUT
4.5MHz or 6.5MHz FM carrier output.
Push-pull output pin.
Output level is 2.5Vp-p (Load resistance=1k
Ω)
1
2
2.4V REG Filter
Internal regulator filter pin.
Please connect 0.1
μF (C1)
2
C1
4V
VCC
3
Emphasis Filter
Emphasis filter pin.
Before FM modulation, make emphasis Characteristic at
audio signal. C1(6800pF)
Emphasis time constant must be matching de-emphasis
time constant. (If you don’t need the emphasis, this pin is
open.)
3
C1
4
VCC
VCC pin.
Supply voltage is 5V DC.
Please connect de-coupling capacitor. (about 47
μF)
5
FM IN
FM signal input.
Please use capacitor coupling.
5
C1
SIG
2.4V
6
Mode CTL
MODE control pin.
Control modulation frequency
TX=4.5MHz: 0 to 0.4V
Stand-by: 2.0 to 3.0V
TX=6.5MHz: 4.5V to VCC
6
Continued on next page.




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