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NTE1800
Integrated Circuit
TV Multiplex Sound Decoder
Description:
The NTE1800 Multiplexed Sound Decoder is a linear integrated circuit in a 30–Lead DIP type package
that incorporates the SAP demodulation and the L, R matrix circuits required to demodulate multiplexed sound signals on the US NTSC system.
The N TE1800 a lso f eatures m ode s witching t o f acilitate the u se o f remote c ontrol, a nd can b e interfaced
easily to the NTE1801 dbx Noise Reduction Decoder IC.
Features:
D Mode switching for remote control
D Built–in muting function
D Pilot cancel circuit
D 8.0 to 13.2V power supply
D 300mV
D 30–pin plastic shrink DIP
D Easily interfaced to the NTE1801
Functions:
D Pilot signal
D SAP signal
D Stereo demodulation
D SAP demodulation
D Mode switching
D Stereo and SAP display drivers
D Pilot canceler
D On–chip 4fH V
D On–chip 5fH V
(MONO) composite signal input voltage
rms
CO
CO
Absolute Maximum Ratings:
Power Supply Voltage, VCCmax 15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Signal Voltage, V
Control Signal Voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
in
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
in
Power Dissipation (TA ≤ +70°C), PDmax 800mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lamp Driver Current, I
Operating Temperature Range, T
Storage Temperature Range, T
lamp
stg
opg
–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Power Supply Voltage, V
CC
Composite Signal Voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
in
8 to 13.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
300mV
5V
5V
30mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
p–p
p–p
rms
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Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Circuit Current I
CC
Stereo Capture Range CC
VCC = 12V, no signal 27 39 52 mA
Stereo demodulation input pin 30mV
1
rms
pilot signal level
Stereo Switch Input Sensitivity SWsense Measure pilot level at stereo demodulation
input. Stereo lamp OFF→ON
Stereo Switch Hysteresis Hy
Pilot level measured at stereo demodulation
1
input. Stereo lamp ON→OFF, OFF→ON
Stereo Switch L–R Output
Voltage
Stereo Demodulation Output
L+R Output Voltage
L+R Output Voltage Pilot
Cancel Level
L–R Output Distortion THDL–R 150mV
VoL–R 150mV
input voltage
VoL+R 150mV
input voltage
fH
REJ
150mV
input voltage
(MONO) stereo demodulation
rms
(MONO) stereo demodulation
rms
(MONO) stereo demodulation
rms
(MONO) stereo demodulation
rms
input voltage, f = 1kHz
L +R Output Distortion THD L+R 150mV
(MONO) stereo demodulation
rms
input voltage, f = 1kHz
SAP Capture Range CC
SAP Sensitivity SAP
SENSE
90mV
2
SAP input voltage ±19 ±25 – %
rms
Measure SAP input level. SAP lamp
OFF→ON
±1.5 ±3.0 – %
12 18 22 mV
5 7 9 dB
380 430 480 mV
380 430 480 mV
30 35 – dB
– 0.2 0.7 %
– 0.2 0.7 %
25 35 45 mV
rms
rms
rms
rms
SAP Switch Hysteresis Hy
Measure SAP input level. SAP Lamp
2
2.5 4.5 6.5 dB
OFF→ON, ON→OFF
SAP Output Distortion THD
SAP
90mV
SAP input voltage, f = 1kHz,
rms
– 0.3 1.0 %
∆f = 10kHz
SAP Output Voltage V
oSAP
90mV
SAP input voltage, f = 1kHz,
rms
380 430 480 mV
∆f = 10kHz
Mode Switch Crosstalk CT 150mV
L,R Matrix Separation SEP 150mV
Matrix Output Voltage (MONO) V
OMONO
Matrix Output Voltage (STEREO) V
Matrix Output Voltage (STEREO) V
OL
OR
215mV
215/2mV matrix input. Same phase input 450 500 550 mV
215/2mV
stereo input, 90mV
rms
(MONO) composite input 30 40 – dB
rms
matrix input. Same phase input 450 500 550 mV
rms
matrix input. Reverse phase
rms
SAP input 45 60 – dB
rms
450 500 550 mV
input
Matrix Output Voltage (SAP) V
OMSAP
215mV
matrix input. 450 500 550 mV
rms
Matrix Output Voltage (MUTE) MUTE Pin17 Open – –70 –60 dB
rms
rms
rms
rms
rms
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Pin Connection Diagram
GND
Limiter Amp Input
Filter Cap
Filter Cap
5fh VCO Cap
5fh Adjust
L–R SAP Output
L–R SAP Input
L–R Input
R Output
V
CC
1
2
3
4
5
6
7Phase Detector Cap
8
30
29
28
27
26
25
24
23
9Mode Switch 22
10Mono Switch
11
21
20
14L Output 17
15 16
SAP Lamp
Stereo Lamp
Phase Comp Cap
Phase Comp Cap
Phase Comp Input
Phase Comp
Phase Comp
4fh Adjust
Pilot Regeneration Cap
Pilot Input
Stereo Input
Preamp Output12 19
Preamp Input13 18
Mute
L–R Output
30 16
115
1.066 (27.0)
.388 (8.6)
.200
(5.08)
Max
.125 (3.17).070 (1.78)
.400 (10.16)
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