NTE1838 & NTE1856
Integrated Circuit
Color TV Video/Chroma/Deflection Circuit
Description:
The NTE1839 and NTE1856 are smallsized multifunctional integrated circuits containing the "video,
chroma, deflection" circuit of NTSC color TVs in a 30Lead DIP type package. Besides being small
sized, they have such features as fewer external components and fewer adjustments. required. The
NTE1838/NTE1856 can be used in conjunction with the NTE1728 for "VIF
SIF" use or the
NTE1773/NTE1797 for "vertical output" use to perform all color TV signal processings.
The NTE1856 contains a peak clip circuit in the video circuit making it well suited for use in smallsized
TV sets while the NTE1838 contains no peak clip circuit and is suited for largesized TV sets.
Features:
D
SmallSized Package
D
Minimum Number of External Components Required
D
Fewer Adjustments Required (NonAdjusting of Functions Shown Below)
G
Chroma VCO (APC)
G
Horizontal OSC (HHold)
G
Vertical OSC (VHold)
D
Multifunctional
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Maximum Supply Voltage, V
16
max
14V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Supply Current, I
22
max
15mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation (T
A
+65
C), P
d
max
1100mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Recommended Supply Voltage
V
16
9.0
12.0
14.0
V
Recommended Supply Current
I
22
8.5
10.0
15.0
mA
Electrical Characteristics: (T
A
= +25
C, V
16
= 12V, I
22
= 10mA unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Chroma
ACC Amplitude Characteristic
ACC
1
3
0
+3
dB
ACC
2
7
0
+2
dB
ACC Phase Characteristic
ACC
1
0
3
deg
ACC
2
0
7
deg
Maximum BY Demodulation Output
BYmax
5.0
V
PP
Unicolor Amplitude Characteristic
GU
17
dB
Tint Change Range
T
110
deg
APC PullIn Range
f
APC
300
Color Difference Output DC Voltage
E
RGB
6.7
7.2
7.7
V
Color Difference DC Difference Voltage
E
RGB
300
mV
RY Relative Demodulation Angle
RY/BY
104
deg
GY Relative Demodulation Angle
GY/BY
122
deg
RY Demodulation Ratio
RY/BY
0.9
GY Demodulation Ratio
GY/BY
0.3
Video
Video Tone Control Characteristic
G
P
min
5
3
1
dB
G
P
max
12
15
18
dB
Video Voltage Gain
V
G
12
15
18
dB
Contrast Variable Range
G
C
18
dB
Frequency Response
G
V
f = 5MHz
5
dB
Synchronization, Deflection
Sync Separation Input DC Level
V
S
S
9.3
V
Vertical FreeRunning Frequency
f
V
f
H
/296.5
Hz
Vertical Blanking Pulse Width
T
BL
19H
Vertical Drive Stage Voltage Gain
V
G
16
dB
Horizontal FreeRunning Frequency
f
H
15.734
kHz
Horizontal Drive Output Pulse Width
T
H
24.5
s
Horizontal Sync PullIn Range
f
PULL
400
Hz
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