NTE846 PDF даташит
Спецификация NTE846 изготовлена «NTE Electronics» и имеет функцию, называемую «Integrated Circuit TV Video Modulator». |
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Детали детали
Номер произв | NTE846 |
Описание | Integrated Circuit TV Video Modulator |
Производители | NTE Electronics |
логотип |
3 Pages
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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 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 am-
bient.
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DC Electrical Characteristics: (All SW Normally Pos. 1, VA = 15V, VB = 12V unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Supply Current
Sound Oscillator, Current Change
Chroma Oscillator Balance
Chroma Modulator Balance
R–Y Modulator Output Level
IS
∆I15
V17
V13
∆V13
Change VA from 12.5V to 17.5V
SW 3: Pos. 2,
Change SW 1 from Pos. 1 to Pos. 2
20 35 45 mA
0.3 0.6 0.9 mA
9.5 11.0 12.5 V
7.0 7.4 7.8 V
0.6 0.9 1.2 V
B–Y Modulator Output Level
∆V13
SW 3: Pos. 2,
0.6 0.9 1.2 V
Change SW 2 from Pos. 1 to Pos. 2
Chroma Modulator Conversion
Ratio
∆V13/∆V3
Divide ∆V13 by ∆V3, SW 3: Pos. 2, 0.45 0.70 0.95 V/V
Change SW 0 from Pos. 1 to Pos. 2,
Channel A Oscillator
“OFF” Voltage
V8, V9
SW 4: Pos. 2
0.5 1.5 3.0 V
Channel A Oscillator Curremt Level
Channel B Oscillator
“OFF” Voltage
I9
V6, V7
VB = 12V, VC = 13V
SW 4: Pos. 2
2.5 3.5 5.0 mA
0.5 1.5 3.0 V
Channel B Oscillator Curremt Level
Channel A Modulator Conversion
Ratio
Channel B Modulator Conversion
Ratio
I6 VB = 12V, VC = 13V
∆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
2.5 3.5 5.0
0.35 0.55 0.75
0.35 0.55 0.75
mA
V/V
V/V
AC Electrical Characteristics: (V = 15V unless otherwise specified)
Parameter
Symbol
Test Conditions
Chroma Oscillator Output Level
Sound Carrier Oscillator Level
V17 CLOAD ≤ 20pF
V15 Loaded by RC Coupling Network
Channel 3 RF Oscillator Level
V8, V9
Ch SW: Pos. 3, f = 61.25MHz,
Use FET Probe
Channel 4 RF Oscillator Level
V6, V7
Ch SW: Pos. 4, f = 67.25MHz,
Use FET Probe
Min Typ Max Unit
4 5 – VP–P
2 3 4 VP–P
200 350 – mVP–P
200 350 – mVP–P
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Pin Connection Diagram
Chroma Lead 1
R – Y Input 2
Chroma Bias 3
B – Y Input 4
GND 5
Ch B Tank 6
Ch B Tank 7
Ch A Tank 8
Ch A Tank 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
19
.870 (22.1) Max
.100 (2.54)
.800 (20.3)
.150
(3.8)
.250
(6.35)
.125 (3.17) Min
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