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:
(T
A
= +25°C unless otherwise specified)
Supply Voltage, V
8−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Supply Voltage, V
17−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1V
Circuit Voltage, V
5−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 14.4V
Circuit Voltage, V
6−21
, V
7−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−3
to +6V
Circuit Voltage, V
10−21
, V
12−21
, V
18−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V
8−21
V
Circuit Voltage, V
24−21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V
Circuit Current, I
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 20mA
Circuit Current, I
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−1
to +3mA
Circuit Current, I
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−3
to +1mA
Circuit Current, I
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−3
to 0mA
Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630mW
Operating Ambient Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−20°
to +70°C
Storage Temperatuere Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−20°
to +150°C
Note *. + and
−
are flow−in and flow−out currents to/from the circuit, respectively.
Electrical Characteristics:
(T
A
= +25°C unless otherwise specified)
Parameter
Circuit Current
Output Voltage “H” Level
(Tint Manual)
“L” Level
Output Voltage “H” Level
(Color Manual)
“L” Level
Output Voltage “H” Level
(Tint Auto)
“L” Level
Output Voltage “H” Level
(Color Auto)
“L” Level
Voltage Amplification (Y Amp.)
VIR Directional Level
Pulse Width (19H)
Sensitivity
Tint Manual Control
Color Manual Control
Tint Auto Control
Color Auto Control
Tint Pre−Emphasis
Control
Symbol
I
8
I
17
V
9−21(H)
V
9−21(L)
V
20−21(H)
V
20−21(L)
V
11−21(H)
V
11−21(L)
V
19−21(H)
V
19−21(L)
A
V
V
(VIR)
t
w
S
(1)
S
(2)
S
(3)
S
(4)
S
(5)
Pin 4 output (SW 1:1) for
Pin 1 video signal input (1V
p−p)
Pin 2 VIR signal level (SW 1:1)
at the start of LED ON
19H pulse width of
Pins 14 & 16 (SW 1:2)
Differential voltage ratio
between Pins 9 & 12
Differential voltage ratio
between Pins 20 & 18 (SW 1:2)
Differential voltage ratio
between Pins 9 & 13 (SW 1:1)
Differential voltage ratio
between Pins 20 & 15 (SW 1:2)
Differential voltage ratio
between Pins 9 & 10 (SW 1:1)
Test Conditions
V
8−21
= 12V
V
17−21
= 5 1V
5.1V
Min
20
5
10.3
0.6
9.5
0
9.5
0.4
10.1
0.4
1.75
0.23
7
0.83
0.86
40
41.5
−1.5
Typ
25.5
12
11
1.3
10.2
−
10.2
1.7
10.9
1.8
1.95
0.28
12
0.94
0.97
43
44.5
−1.3
Max
31
19
11.7
2.0
10.9
0.3
10.9
2.7
11.7
3.1
2.15
0.33
17
1.05
1.08
46
47.5
−1.1
Unit
mA
mA
V
V
V
V
V
V
V
V
times
V
μs
times
times
dB
dB
times
Pin Connection Diagram
(Front View)
Y Signal Input
Variable
Y Signal Input Fixed
Ripple Filter
To Color Prefer
Control
VIR Signal Presence
Indicator
Horiz Blank Pulse In
Vert Blank Pulse In
V
CC
Tint Control Output
1
2
3
4
5
6
7
8
9
24
Sync Input
23
RC Coupling Network
22
RC Coupling Network
21
GND
20
Color Control Output
19
Ripple Filter
18
Manual Color Control
17
V
CC
16
Ripple Filter
15
B
−
Y Signal Input
14
Ripple Filter
13
R
−
Y Signal Input
To Tint Prefer
10
Control
Ripple Filter
11
Manual Tint Control
12
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