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NTE1489 Arkusz danych(PDF) 1 Page - NTE Electronics

Numer części NTE1489
Szczegółowy opis  Integrated Circuit Stereo Demodulator
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Producent  NTE [NTE Electronics]
Strona internetowa  http://www.nteinc.com
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NTE1489 Arkusz danych(HTML) 1 Page - NTE Electronics

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NTE1489
Integrated Circuit
Stereo Demodulator
Description:
The NTE1489 is a silicon monolithic integrated circuit in a 16–Lead DIP type package designd for use
as an FM multiplex demodulator for high class stere FM tuners. As the IC adopts a PLL (Phase Lock
Loop) system, complexity of contol is usually experienced when using conventional external coil is
eliminated and the demodulator can easily be constructed by simply controlling the external semi–
fixed potentiometer. Internal circuits are composed of a stereo demodulator, a lamp driver, an input
stage pre–amplifier that is capable of establishing variable input signal levels, a VCO (Voltage Con-
trolled Oscillator) constituting PLL, a phase comparator, a LPF (Low Pass Filter), a frequency divider,
and a DC amplifier. A stereo–monaural automatic switching circuit, a circuit for manual switching,
VCO forced stop circuit, etc. are built–in.
Features:
D Fewer External Components. Coil is not used.
D Low Monaural Total Harmonic Distortion
D Low Stereo Total Harmonic Distortion
D High Channel Separation
D Built–In Output Stage Post Amplifier
D Stereo–Monaural Switching can be made either Automatically or Manually from Outside. The
Shock Noise at Switching is Reduced Considerably.
D Stereo–Monaural Switching Operation is perfectly Synchronized with the Stereo Indicator Lamp
D Monitoring of VCO Free Running Frequency can be Performed by Directly Connecting the Fre-
quency Counter to Pin9.
D High Signal–to–Noise Ratio
D Wide Maximum Input Level
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lamp Current, IL
75mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Dissipation (TA = +70°C), PD
400mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topr
–20
° to +70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg
–40
° to +125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
VCC
9
12
15
V


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