Datasheet for Ic-fm Stereo Demodulator

Datasheet for Ic-fm Stereo Demodulator
NTE1142
Integrated Circuit
FM Multiplex Stereo Decoder
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA
Lamp Driver Current, IL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Operating Temperature Range (VCC = 12V), Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −10 to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to +125°C
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Standby Current
ICC
VCC = 12V
−
10
18
mA
Input Impedance
Zi
f = 1.0kHz
−
20
−
kΩ
f = 100kHz (Note 1)
−
35
−
dB
f = 1.0kHz
30
45
−
dB
f = 10kHz with 15kHz LPF
−
30
−
dB
38kHz BEF
−
−1.5
−
dB
Monoaural Input, f = 1.0kHz
−
0.2
2.0
dB
Stereo Channel Seperation
Voltage Gain
Sep
AV
Channel Balance
Ch. B
Total Harmonic Distortion
THD
−
0.5
1.0
%
Audio Muting Voltage
(Required at Pin 5)
Mute On
0.6
0.85
−
V
Mute Off
−
1.08
1.5
V
Lamp Indictaor Input Level
Lamp ON
−
12
22
mVrms
Lamp Off
−
8.4
−
mVrms
Stereo
−
1.13
1.5
V
Mono
0.6
0.82
−
V
19kHz (Note 2)
−
30
−
dB
38kHz (Note 2)
−
25
−
dB
without filter
−
55
−
dB
(Note 3)
45
55
−
dB
Stereo−Monaural Switching
V lt
Voltage
(Required
(R
i d att Pin
Pi 4)
Ultrasonic Frequency Rejection
Inherent SCA Rejection
Attenuation in Muting Mode
SCArej
Note 1. Measurement made with 200mVrms Standard Multiplex Composite Signal Containing Left
(45%) and Right (45%) audio information with a 10% (19kHz) pilot signal. Modulation frequency is 1.0kHz unless otherwise specified.
Note 2. Referenced to 1.0kHz output signal with Standard Multiplex Composite Input Signal.
Note 3. Referenced to 1.0kHz output signal with either Standard Multiplex Composite or Monoaural
Input Signal.
Pin Connection Diagram
(Front View)
19kHz Tank
1
14
Filter Network
19kHz Tank
2
13
38kHz Tank
Input
3
12
Rt Channel Output
Stereo Switch
4
11
Lt Channel Output
Mute Switch
5
10
38kHz Tank
Lamp Drive
6
9
VCC
GND
7
8
N.C.
14
8
1
7
.785 (19.95)
Max
.300
(7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
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