NTE846 Integrated Circuit TV Video Modulator Description: The NTE846 is designed to interface color difference, audio, and luminance signals to the antenna terminals of a TV receiver. It consists of a sound subcarrier oscillator, chroma subcarrier oscillator, quatrature chroma modulators, and RF oscillators and modulators for two low–VHF channels. The NTE846 allows video information from VTR’s test equipment, games, or similar sources to be displayed on black and white or color TV receivers. Features: D DC Channel Switching D Excellent Oscillator Stability D 12V to 18V Supply Operation D Low Intermodulation Products D 5Vp–p Chroma Reference Signal D May Be Used to Encode Composite Video Absolute Maximum Ratings: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19V (V16–V15) Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5V (V14–V10) Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V (V14–V11) Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Power Dissipation Package (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1390mW Chroma Osc Current I17 Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to 150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Lead Temperature (During Soldering, 10 seconds), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Note 1. For operation in ambient temperatures above 25°C, the device must be derated based on a 150°C maximum junction temperature and a thermal resistance of 90°C/W junction to ambient. DC Electrical Characteristics: (All SW Normally Pos. 1, VA = 15V, VB = 12V unless otherwise specified) Parameter Supply Current Symbol Test Conditions Min Typ 20 35 45 mA 0.3 0.6 0.9 mA IS Max Unit Sound Oscillator, Current Change ∆I15 Chroma Oscillator Balance V17 9.5 11.0 12.5 V Chroma Modulator Balance V13 7.0 7.4 7.8 V R–Y Modulator Output Level ∆V13 SW 3: Pos. 2, Change SW 1 from Pos. 1 to Pos. 2 0.6 0.9 1.2 V B–Y Modulator Output Level ∆V13 SW 3: Pos. 2, Change SW 2 from Pos. 1 to Pos. 2 0.6 0.9 1.2 V ∆V13/∆V3 Divide ∆V13 by ∆V3, SW 3: Pos. 2, Change SW 0 from Pos. 1 to Pos. 2, 0.45 0.70 0.95 SW 4: Pos. 2 0.5 1.5 3.0 V VB = 12V, VC = 13V 2.5 3.5 5.0 mA SW 4: Pos. 2 0.5 1.5 3.0 V VB = 12V, VC = 13V 2.5 3.5 5.0 mA Chroma Modulator Conversion Ratio Channel A Oscillator “OFF” Voltage Channel A Oscillator Curremt Level Channel B Oscillator “OFF” Voltage Channel B Oscillator Curremt Level V8, V9 I9 V6, V7 I6 Change VA from 12.5V to 17.5V V/V Channel A Modulator Conversion Ratio ∆V11/(V13–V12) SW 1, SW 2, SW 3: Pos. 2, VB = 12V, Change VC from 13V to 11V for ∆V11, Divide by V13 – V12 0.35 0.55 0.75 V/V Channel B Modulator Conversion Ratio ∆V10/(V13–V12) All SW: Pos. 2, VB = 12V, Change VC from 13V to 11V, Divide as Above 0.35 0.55 0.75 V/V AC Electrical Characteristics: (V = 15V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Chroma Oscillator Output Level V17 CLOAD ≤ 20pF 4 5 – VP–P Sound Carrier Oscillator Level V15 Loaded by RC Coupling Network 2 3 4 VP–P Channel 3 RF Oscillator Level V8, V9 Ch SW: Pos. 3, f = 61.25MHz, Use FET Probe 200 350 – mVP–P Channel 4 RF Oscillator Level V6, V7 Ch SW: Pos. 4, f = 67.25MHz, Use FET Probe 200 350 – mVP–P Pin Connection Diagram Chroma Lead 1 18 Chroma Lag R – Y Input 2 17 Chroma OSC Output Chroma Bias 3 16 Chroma Supply B – Y Input 4 15 Sound Tank GND 5 14 RF Supply Ch B Tank 6 13 Chroma Subcarrier Ch B Tank 7 12 Video Input Ch A Tank 8 11 Ch A Output Ch A Tank 9 10 Ch B Output 18 10 1 9 .870 (22.1) Max .250 (6.35) .150 (3.8) .100 (2.54) .800 (20.3) .125 (3.17) Min