NTE NTE1437

NTE1437
Integrated Circuit
VIR Signal Processor
Description:
The NTE1437 is an integrated circuit designed for color TV VIR (Vertical Interval Reference) signal
processing circuits (with auto tint compensation circuit).
Features:
D Incorporating VIR signal discriminator color control, tint control and Y signal amplifier on a single
chip, easier for compact set design.
D Reduction in external components
D No adjustment required
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, V8−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Supply Voltage, V17−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1V
Circuit Voltage, V5−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 14.4V
Circuit Voltage, V6−21, V7−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to +6V
Circuit Voltage, V10−21, V12−21, V18−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V8−21V
Circuit Voltage, V24−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V
Circuit Current, I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 20mA
Circuit Current, I9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1 to +3mA
Circuit Current, I20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to +1mA
Circuit Current, I23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to 0mA
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630mW
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C
Storage Temperatuere Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +150°C
Note *. + and − are flow−in and flow−out currents to/from the circuit, respectively.
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
I8
Circuit Current
Test Conditions
V8−21 = 12V
V17−21 = 5
5.1V
1V
I17
Min
Typ
Max
Unit
20
25.5
31
mA
5
12
19
mA
Output Voltage “H” Level
(Tint Manual)
“L” Level
V9−21(H)
10.3
11
11.7
V
V9−21(L)
0.6
1.3
2.0
V
Output Voltage “H” Level
(Color Manual)
“L” Level
V20−21(H)
9.5
10.2
10.9
V
V20−21(L)
0
−
0.3
V
Output Voltage “H” Level
(Tint Auto)
“L” Level
V11−21(H)
9.5
10.2
10.9
V
V11−21(L)
0.4
1.7
2.7
V
Output Voltage “H” Level
(Color Auto)
“L” Level
V19−21(H)
10.1
10.9
11.7
V
V19−21(L)
0.4
1.8
3.1
V
Voltage Amplification (Y Amp.)
VIR Directional Level
Pin 4 output (SW 1:1) for
Pin 1 video signal input (1Vp−p)
1.75
1.95
2.15
times
V(VIR)
Pin 2 VIR signal level (SW 1:1)
at the start of LED ON
0.23
0.28
0.33
V
tw
19H pulse width of
Pins 14 & 16 (SW 1:2)
7
12
17
μs
Tint Manual Control
S(1)
Differential voltage ratio
between Pins 9 & 12
0.83
0.94
1.05
times
Color Manual Control
S(2)
Differential voltage ratio
between Pins 20 & 18 (SW 1:2)
0.86
0.97
1.08
times
Tint Auto Control
S(3)
Differential voltage ratio
between Pins 9 & 13 (SW 1:1)
40
43
46
dB
Color Auto Control
S(4)
Differential voltage ratio
between Pins 20 & 15 (SW 1:2)
41.5
44.5
47.5
dB
Tint Pre−Emphasis
Control
S(5)
Differential voltage ratio
between Pins 9 & 10 (SW 1:1)
−1.5
−1.3
−1.1
times
Pulse Width (19H)
Sensitivity
AV
Pin Connection Diagram
(Front View)
Y Signal Input
Variable
Y Signal Input Fixed
1
24 Sync Input
2
23 RC Coupling Network
Ripple Filter
To Color Prefer
Control
VIR Signal Presence
Indicator
Horiz Blank Pulse In
3
22 RC Coupling Network
4
21 GND
5
20 Color Control Output
6
19 Ripple Filter
Vert Blank Pulse In
7
18 Manual Color Control
VCC
8
17 VCC
Tint Control Output
9
16 Ripple Filter
To Tint Prefer 10
Control
Ripple Filter 11
15 B − Y Signal Input
Manual Tint Control 12
13 R − Y Signal Input
14 Ripple Filter
24
13
1
12
.520
(13.2)
1.300 (33.02)
Max
.225
(5.73)
Max
.100 (2.54)
1.100 (27.94)
.126
(3.22)
Min
.600
(15.24)