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 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 Built–in muting function D Pilot cancel circuit D 8.0 to 13.2V power supply D 300mVrms (MONO) composite signal input voltage 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 VCO D On–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 Circuit Current ICC VCC = 12V, no signal Stereo Capture Range CC1 Stereo demodulation input pin 30mVrms pilot signal level Stereo Switch Input Sensitivity Min Typ Max Unit 27 39 52 mA ±1.5 ±3.0 – % SWsense Measure pilot level at stereo demodulation input. Stereo lamp OFF→ON 12 18 22 mVrms Stereo Switch Hysteresis Hy1 Pilot 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 % ±19 ±25 – % 25 35 45 mVrms SAP Capture Range SAP Sensitivity CC2 90mVrms SAP input voltage SAPSENSE Measure SAP input level. SAP lamp OFF→ON SAP Switch Hysteresis Hy2 Measure 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 % VoSAP 90mVrms SAP input voltage, f = 1kHz, ∆f = 10kHz 380 430 480 mVrms SAP Output Voltage 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 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 215mVrms matrix input. 450 500 550 mVrms – –70 –60 dB Matrix Output Voltage (MONO) Matrix Output Voltage (SAP) Matrix Output Voltage (MUTE) VOMSAP MUTE Pin17 Open Pin Connection Diagram GND Limiter Amp Input Filter Cap Filter Cap 5fh VCO Cap 5fh Adjust Phase Detector Cap L–R SAP Output Mode Switch Mono Switch L–R SAP Input L–R Input R Output L Output VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 30 16 1 15 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 Output Preamp Input Mute L–R Output 1.066 (27.0) .388 (8.6) .200 (5.08) Max .070 (1.78) .125 (3.17) .400 (10.16)