NTE1800
Integrated Circuit
TV Multiplex Sound Decoder
Description:
The NTE1800 Multiplexed Sound Decoder is a linear integrated circuit in a 30Lead DIP type package
that incorporates the SAP demodulation and the L, R matrix circuits required to demodulate multi-
plexed sound signals on the US NTSC system.
The NTE1800 also features mode switching to facilitate the use of remote control, and can be interfaced
easily to the NTE1801 dbx Noise Reduction Decoder IC.
Features:
D
Mode switching for remote control
D
Builtin muting function
D
Pilot cancel circuit
D
8.0 to 13.2V power supply
D
300mV
rms
(MONO) composite signal input voltage
D
30pin 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
Onchip 4fH V
CO
D
Onchip 5fH V
CO
Absolute Maximum Ratings:
Power Supply Voltage, V
CC
max
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Signal Voltage, V
in
5V
pp
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Signal Voltage, V
in
5V
pp
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
+70
C), P
D
max
800mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lamp Driver Current, I
lamp
30mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opg
20
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (T
A
= +25
C unless otherwise specified)
Power Supply Voltage, V
CC
8 to 13.2V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Composite Signal Voltage, V
in
300mV
rms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, V
CC
= 12V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Circuit Current
I
CC
V
CC
= 12V, no signal
27
39
52
mA
Stereo Capture Range
CC
1
Stereo demodulation input pin 30mV
rms
pilot signal level
1.5
3.0
%
Stereo Switch Input Sensitivity
SWsense
Measure pilot level at stereo demodulation
input. Stereo lamp OFF
ON
12
18
22
mV
rms
Stereo Switch Hysteresis
Hy
1
Pilot level measured at stereo demodulation
input. Stereo lamp ON
OFF, OFF
ON
5
7
9
dB
Stereo Switch LR Output
Voltage
VoLR
150mV
rms
(MONO) stereo demodulation
input voltage
380
430
480
mV
rms
Stereo Demodulation Output
L+R Output Voltage
VoL+R
150mV
rms
(MONO) stereo demodulation
input voltage
380
430
480
mV
rms
L+R Output Voltage Pilot
Cancel Level
fH
REJ
150mV
rms
(MONO) stereo demodulation
input voltage
30
35
dB
LR Output Distortion
THDLR
150mV
rms
(MONO) stereo demodulation
input voltage, f = 1kHz
0.2
0.7
%
L +R Output Distortion
THD L+R
150mV
rms
(MONO) stereo demodulation
input voltage, f = 1kHz
0.2
0.7
%
SAP Capture Range
CC
2
90mV
rms
SAP input voltage
19
25
%
SAP Sensitivity
SAP
SENSE
Measure SAP input level. SAP lamp
OFF
ON
25
35
45
mV
rms
SAP Switch Hysteresis
Hy
2
Measure SAP input level. SAP Lamp
OFF
ON, ON
OFF
2.5
4.5
6.5
dB
SAP Output Distortion
THD
SAP
90mV
rms
SAP input voltage, f = 1kHz,
f = 10kHz
0.3
1.0
%
SAP Output Voltage
V
oSAP
90mV
rms
SAP input voltage, f = 1kHz,
f = 10kHz
380
430
480
mV
rms
Mode Switch Crosstalk
CT
150mV
rms
stereo input, 90mV
rms
SAP input
45
60
dB
L,R Matrix Separation
SEP
150mV
rms
(MONO) composite input
30
40
dB
Matrix Output Voltage (MONO)
V
OMONO
215mV
rms
matrix input. Same phase input
450
500
550
mV
rms
Matrix Output Voltage (STEREO)
V
OL
215/2mV matrix input. Same phase input
450
500
550
mV
rms
Matrix Output Voltage (STEREO)
V
OR
215/2mV
rms
matrix input. Reverse phase
input
450
500
550
mV
rms
Matrix Output Voltage (SAP)
V
OMSAP
215mV
rms
matrix input.
450
500
550
mV
rms
Matrix Output Voltage (MUTE)
MUTE
Pin17 Open
70
60
dB
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