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 multi-
plexed sound signals on the US NTSC system.
The NTE1800 a lso f eatures mode s witching t o f acilitate the u se o f r emote c ontrol, a nd c an b e i nterfaced
easily to the NTE1801 dbx Noise Reduction Decoder IC.
Features:
DMode switching for remote control
DBuilt–in muting function
DPilot cancel circuit
D8.0 to 13.2V power supply
D300mVrms (MONO) composite signal input voltage
D30–pin plastic shrink DIP
DEasily interfaced to the NTE1801
Functions:
DPilot signal
DSAP signal
DStereo demodulation
DSAP demodulation
DMode switching
DStereo and SAP display drivers
DPilot canceler
DOn–chip 4fH VCO
DOn–chip 5fH VCO
Absolute Maximum Ratings:
Power Supply Voltage, VCCmax 15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Signal Voltage, Vin 5Vp–p
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Signal Voltage, Vin 5Vp–p
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (TA ≤ +70°C), PDmax 800mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lamp Driver Current, Ilamp 30mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topg –20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Power Supply Voltage, VCC 8 to 13.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Composite Signal Voltage, Vin 300mVrms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Circuit Current ICC VCC = 12V, no signal 27 39 52 mA
Stereo Capture Range CC1Stereo demodulation input pin 30mVrms
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 mVrms
Stereo Switch Hysteresis Hy1Pilot level measured at stereo demodulation
input. Stereo lamp ON→OFF, OFF→ON 5 7 9 dB
Stereo Switch L–R Output
Voltage VoL–R 150mVrms (MONO) stereo demodulation
input voltage 380 430 480 mVrms
Stereo Demodulation Output
L+R Output Voltage VoL+R 150mVrms (MONO) stereo demodulation
input voltage 380 430 480 mVrms
L+R Output Voltage Pilot
Cancel Level fHREJ 150mVrms (MONO) stereo demodulation
input voltage 30 35 –dB
L–R Output Distortion THDL–R 150mVrms (MONO) stereo demodulation
input voltage, f = 1kHz –0.2 0.7 %
L +R Output Distortion THD L+R 150mVrms (MONO) stereo demodulation
input voltage, f = 1kHz –0.2 0.7 %
SAP Capture Range CC290mVrms SAP input voltage ±19 ±25 –%
SAP Sensitivity SAPSENSE Measure SAP input level. SAP lamp
OFF→ON 25 35 45 mVrms
SAP Switch Hysteresis Hy2Measure SAP input level. SAP Lamp
OFF→ON, ON→OFF 2.5 4.5 6.5 dB
SAP Output Distortion THDSAP 90mVrms SAP input voltage, f = 1kHz,
∆f = 10kHz –0.3 1.0 %
SAP Output Voltage VoSAP 90mVrms SAP input voltage, f = 1kHz,
∆f = 10kHz 380 430 480 mVrms
Mode Switch Crosstalk CT 150mVrms stereo input, 90mVrms SAP input 45 60 –dB
L,R Matrix Separation SEP 150mVrms (MONO) composite input 30 40 –dB
Matrix Output Voltage (MONO) VOMONO 215mVrms matrix input. Same phase input 450 500 550 mVrms
Matrix Output Voltage (STEREO) VOL 215/2mV matrix input. Same phase input 450 500 550 mVrms
Matrix Output Voltage (STEREO) VOR 215/2mVrms matrix input. Reverse phase
input 450 500 550 mVrms
Matrix Output Voltage (SAP) VOMSAP 215mVrms matrix input. 450 500 550 mVrms
Matrix Output Voltage (MUTE) MUTE Pin17 Open – –70 –60 dB
4fh Adjust
5fh Adjust
5fh VCO Cap
Pin Connection Diagram
VCC
Phase Comp
R Output
Filter Cap
L–R SAP Input
Pilot Regeneration Cap
Phase Comp Input
Phase Comp Cap
Phase Comp
Phase Comp Cap
Stereo Lamp
GND
L–R SAP Output
L–R Input
1
2
3
4
Limiter Amp Input
Filter Cap
5
6
7Phase Detector Cap 8
30
29
28
27
SAP Lamp
26
25
24
23
9Mode Switch 22 Pilot Input
Stereo Input
10Mono Switch 11 21
20 Preamp Output12 19 Preamp Input13 18
14L Output 17 Mute
15 16 L–R Output
.400 (10.16)
.200
(5.08)
Max
.388 (8.6)
30 16
115
1.066 (27.0)
.125 (3.17).070 (1.78)
