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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 150C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Lead Temperature (During Soldering, 10 seconds), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C Note 1. For operation in ambient temperatures above 25C, the device must be derated based on a 150C maximum junction temperature and a thermal resistance of 90C/W junction to ambient.
DC Electrical Characteristics: (All SW Normally Pos. 1, VA = 15V, VB = 12V unless otherwise specified)
Parameter Supply Current Sound Oscillator, Current Change Chroma Oscillator Balance Chroma Modulator Balance R-Y Modulator Output Level B-Y Modulator Output Level Chroma Modulator Conversion Ratio Channel A Oscillator "OFF" Voltage Channel A Oscillator Curremt Level Channel B Oscillator "OFF" Voltage Channel B Oscillator Curremt Level Channel A Modulator Conversion Ratio Channel B Modulator Conversion Ratio Symbol IS I15 V17 V13 V13 V13 V13/V3 V8, V9 I9 V6, V7 I6 SW 3: Pos. 2, Change SW 1 from Pos. 1 to Pos. 2 SW 3: Pos. 2, Change SW 2 from Pos. 1 to Pos. 2 Divide V13 by V3, SW 3: Pos. 2, Change SW 0 from Pos. 1 to Pos. 2, SW 4: Pos. 2 VB = 12V, VC = 13V SW 4: Pos. 2 VB = 12V, VC = 13V Change VA from 12.5V to 17.5V Test Conditions Min 20 0.3 9.5 7.0 0.6 0.6 Typ 35 0.6 Max Unit 45 0.9 mA mA V V V V V/V V mA V mA V/V
11.0 12.5 7.4 0.9 0.9 7.8 1.2 1.2
0.45 0.70 0.95 0.5 2.5 0.5 2.5 1.5 3.5 1.5 3.5 3.0 5.0 3.0 5.0
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 V10/(V13-V12) All SW: Pos. 2, VB = 12V, Change VC from 13V to 11V, Divide as Above
0.35 0.55 0.75
0.35 0.55 0.75
V/V
AC Electrical Characteristics: (V = 15V unless otherwise specified)
Parameter Chroma Oscillator Output Level Sound Carrier Oscillator Level Channel 3 RF Oscillator Level Channel 4 RF Oscillator Level Symbol V17 V15 V8, V9 V6, V7 Test Conditions CLOAD 20pF Loaded by RC Coupling Network Ch SW: Pos. 3, f = 61.25MHz, Use FET Probe Ch SW: Pos. 4, f = 67.25MHz, Use FET Probe Min 4 2 200 200 Typ 5 3 350 350 Max - 4 - - Unit VP-P VP-P mVP-P mVP-P
Pin Connection Diagram
Chroma Lead R - Y Input Chroma Bias B - Y Input GND Ch B Tank Ch B Tank Ch A Tank Ch A Tank
1 2 3 4 5 6 7 8 9
18 Chroma Lag 17 Chroma OSC Output 16 Chroma Supply 15 Sound Tank 14 RF Supply 13 Chroma Subcarrier 12 Video Input 11 Ch A Output 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

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