NTE1790
Integrated Circuit
Video IF, Chroma Deflection
Description:
The NTE1790 combines all the functions required for an NTSC color TV system on a 64Lead DIP
shrink type plastic package. This device is designed to have wide application capability, from a funda-
mental CTV application to a highend MPX CTV with quasiparallel SIF system, with minimal external
parts and adjustments. A quasiparallel SIF system assures buzz free sound reproduction.
Features:
PIF Section
D
3Stage Variable Gain PIF Amplifier
D
High Speed Peak AGC with Dual Time Constants
D
Single End AFT Output with Defeat Function
D
A Delayed RF AGC Output (Reverse AGC)
D
Sync Positive Detected Video Output Polarity
D
Internal Black/White Noise Inverter
QuasiParallel Inter Carrier Detector
D
3Stage Variable Gain Intercarrier IF Amplifier
D
Independent Peak AGC
D
Intercarrier Detector with 90 deg. Carrier Shifter
SIF Section:
D
3Stage Limiter Amplifier
D
Differential Peak Detector
D
Separated Detector Output and Electronic Attenuater Input for Multiplex TV Sound Reception
D
Excellent Electronic Attenuater
D
Preamplifier with an NF Terminal
Video Section:
D
2nd Order Picture Sharpness (DC Control)
D
Contrast Control with UniColor Function
D
Brightness Control with Pedestal Clamping Circuit (Adjustable DC Restoration Ratio)
D
Internal Vertical Blanking
Chroma Section:
D
ACC Circuit
D
Color Control Circuit
D
UniColor Control Circuit
D
Adjustment Free APC Circuit
D
Tint Control Circuit With Sync Pulse Output
D
Color Differential Outputs
Deflection Section:
D
Excellent Sync Separator
D
Adjustment Free Count Down System
D
Stable Vertical Synchronization
D
SawTooth Type AFC
D
Horizontal PreDriver
D
XRay Protector
D
Vertical Drive Amplifier
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Supply Voltage, V
CC
12V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Signal Level, e
in
5V
pp
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF AGC Voltage, V
RF
AGC
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal Section Supply Voltage, V
CC
H
12V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
2660mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above 25
C
212mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +65
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Supply Voltage:
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
PIF Section (Pin19)
8.5
9.0
9.5
V
QIF, SIF Section (Pin37)
8.5
9.0
9.5
V
Video, Chroma, Deflection Section (Pin16)
8.5
9.0
9.5
V
Horizontal Section (Pin58)
6.3
6.8
7.3
V
AC Characteristics: (T
A
= +25
C, V
CC
= 9V, 6.8V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
PIF Section
Input Sensitivity
v
in
70
120
200
V
rms
IF AGC Gain Reduction
GR
60
64
dB
Video Bandwidth
BW
4.5
MHz
Video Ripple
0
1
dB
Differential Phase
DP
5
deg.
Differential Gain
DG
10
%
Video White Peak
V
47
3.2
3.7
4.4
V
Noise Inverter
White Inverter
V
W
TH
2.7
3.0
3.3
V
White Clamp
V
W
CL
4.6
5.0
5.4
V
Black Inverter
V
B
TH
6.4
6.8
7.2
V
Black Clamp
V
B
CL
4.8
5.2
5.6
V
Carrier Suppression
40
dB
Harmonics Suppression
I
2nd
40
dB
Input Impedance
R
i
PIF
1.75
2.5
3.25
k
Input Capacitance
C
i
PIF
2
4
8
pF
AFT Center Voltage
No Signal
5.1
6.5
10.3
V
Offset
3
V
AC Characteristics (Cont'd): (T
A
= +25
C, V
CC
= 9V, 6.8V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
PIF Section (Cont'd)
AFT Sensitivity
15
25
kHz/V
AFT Voltge Swing
A
6
11
V
920kHz Beat
I
920
32
dB
QIF Section
Input Sensitivity
v
in
Q
70
120
200
V
rms
4.5MHz Output Level
1.0
1.5
2.0
V
PP
AGC Gain Reduction
GR Q
60
64
dB
Input Impedance
R
i
QIF
1.75
2.5
3.25
k
Input Capacitance
C
i
QIF
2
4
10
pF
SIF Section
Limiting Sensitivity
v
LIM
115
140
180
V
rms
Detected Output
v
OD
130
155
mV
rms
AM Rejection
AMR
20
dB
SIF Bandwidth
BW SIF
120
160
kHz
THD Bandwidth
BD THD
THD = 1.5%
100
140
kHz
Attenuation AC Gain
G
V
ATT
4
6
8
dB
Maximum Attenuation
ATT
max
70
dB
AF Amp AC Gain
G
V
AF
18
dB
Video Section
Input Impedance, Pin52
z
i52
1.8
2.5
3.2
k
Input Impedance, Pin53
z
i53
14
19
24
k
Video Output Impedance
z
o13
15
30
100
Brightness Control Voltage
V
BR
3.9
4.3
4.7
V
Brightness Sensitivity
G
BR
3.0
3.4
3.8
Minimum Linear Video Input
V
di1
2.3
2.7
V
Maximum Linear Video Input
V
di2
5.0
5.5
V
Video Input Dynamic Range
V
di
2.7
3.2
V
PP
Minimum Video Output
V
do1
0
0.3
1.1
V
Maximum Video Output
V
do2
7.5
7.9
9.0
V
2nd Order Differential Input Dynamic Range
V
diP
0.3
0.4
0.5
V
PP
Video Gain
G
V
3.2
4.2
4.9
Frequency Response
G
f
3.2
1.0
0.8
dB
Contrast Control Voltage Range
dVct
0.71
1.4
2.09
V
Contrast Control Range
dGct
11
12
13
dB
Contrast Control Center Voltage
V
cto
4.2
4.5
4.8
V
Frequency Response Dependence
dG
f
0
0.9
dB
Frequency Response at
Minimum Picture Control
dG
ps
min
10
6
3.4
dB
Maximum Control
dG
ps
max
10
11
12
dB
Center Control
dG
ps
0
3.0
1.7
0
dB
Picture Control Voltage Range
dV
ps
0.68
1.2
1.43
V
AC Characteristics (Cont'd): (T
A
= +25
C, V
CC
= 9V, 6.8V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Video Section (Cont'd)
Vertical Blanking Pulse Output Level
V
V
8.0
8.9
9.0
V
Horizontal Blanking Pulse Detection Level
V
H
8.0
8.4
8.8
V
Horizontal Blanking Input Current
I
H
1.5
2.5
4.0
mA
Chroma Section
ACC Characteristics
e
a
0.72
1.54
V
PP
A
1.0
1.3
V
PP
Demodulator Color Differential Output
e
R1
1.0
1.47
2.0
V
PP
e
G1
0.35
0.51
0.71
V
PP
e
B1
1.19
1.75
2.44
V
PP
Color Killer Residual
e
KR
10
mV
e
KG
10
mV
e
KB
10
mV
Color Control Residual
e
CR
10
mV
e
CG
10
mV
e
CB
10
mV
Color Control Voltage
V
3
4.1
4.6
5.1
V
Color Control Range
dV
3
0.7
1.4
2.1
V
UniColor Control Range
e
U
10.5
12.0
13.5
dB
UniColor Control Voltage
V
8
4.1
4.6
5.1
V
UniColor Control Range
dV
8
0.7
1.4
2.1
V
Color Control Phase Change
d0
C
5
deg.
UniColor Control Phase Change
d0
U
7
deg.
Maximum Input of Bandpass Amplifier
e
M
0.48
0.6
V
PP
Tint Control Range
d0
78
100
131
deg.
Tint Control Range
d0
1
35
55
deg.
d0
2
31
45
deg.
Tint Control Voltage
V
2
4.0
4.6
5.1
V
Tint Control Voltage Range
dV
2
0.25
0.5
0.75
V
Sync Pulse Width
S
t
4.5
s
Sync Pulse, High
V
S1
5.42
V
Sync Pulse, Low
V
S2
3.6
V
APC Frequency Control Sensitivity
b
7.0
Hz/mV
APC PullIn Range
f
P
1.3
Hz
APC Hold Range
f
Hld
2.5
Hz
Sweeper Amplitude
SEV1
4.0
V
SEV2
3.0
V
SEV
0.8
1.0
1.2
V
PP
Sweeper Period
tE1
4
7
10
ms
tE2
35
55
77
ms
tE
39
62
87
ms
Killer Level
e
K
0.4
1.0
mV
PP
AC Characteristics (Cont'd): (T
A
= +25
C, V
CC
= 9V, 6.8V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Chroma Section (Cont'd)
Demod Output DC Voltage
R.G.B
4.9
5.6
6.4
V
Maximum Demod Output
E
R
3.9
4.6
5.9
V
PP
E
G
1.3
1.54
2.0
V
PP
E
B
3.9
4.6
5.9
V
PP
Demod Relative Amplitude
R/B
0.71
0.84
0.97
G/B
0.23
0.29
0.35
Demod Relative Phase
RB
102
109
116
deg.
GB
227
242
252
deg.
Demod Output Residual Carrier
ECR
300
mV
PP
ECG
300
mV
PP
ECB
300
mV
PP
Deflection Section
Pin57 Input Current
I
R57
1
A
Sync Signal Delay Time
t
pdr
0
40
100
ns
t
pdf
0
60
100
ns
Pin56 Terminal Voltage
V
56
5.2
5.7
6.2
V
Pin56 Output Current
I
O56
2.0
3.0
4.9
A
Gate Pulse Width
T
pw8
2.7
3.0
3.6
s
Gate Pulse Delay
t
pd8
0.2
0.4
0.6
s
Chroma Sweep Pulse Width
T
cwt
8H
Vertical Masking Pulse (Gate)
256.25H to 10.25H
Vertical Masking Pulse (Horizontal AFC)
256.25H to 10.25H
Vertical Sync Integrating Time Constants
T
VS
12
16
34
s
Vertical Retrace Pulse Width
T
VO55
10H / 11H
Vertical Amp Gain
G
VA54
8.7
9.5
10.7
dB
Vertical Amp Input Dynamic Range
V
i55
1.1
1.6
V
Vertical Amp Output Dynamic Range
V
H55
5.1
6.2
7.3
V
V
L55
1.1
1.9
3.1
V
Vertical Amp Maximum Output Current
I
O54
11.2
16.8
25.0
mA
Horizontal 32f
H
Oscillator Starting Voltage
V
CC58
1
1.7
2.0
2.5
V
Horizontal Drive Output Starting Voltage
V
CC58
2
2.7
3.0
3.2
V
Horizontal Drive Output Starting Current
I
CC58
4.0
5.4
6.8
mA
Horizontal Oscillator Frequency
f
H
15654
15734
15814
Hz
f
H
temperature Drift
df
HT
40
70
100
Hz
f
H
V
CC
Coefficient
df
HV
0
20
40
Hz
Horizontal Output Duty
T
O64
39
41
43
%
Horizontal Output Saturation Voltage
V
OL64
0
0.2
0.3
V
f
H
PullIn Range
df
pull
550
750
880
Hz
f
H
Hold Range
df
hold
550
750
880
Hz
X'Ray Sense Voltage
V
in1
1.1
1.3
1.5
V
X'Ray Sense Current
I
in1
0.05
0.4
1.0
A
AC Characteristics (Cont'd): (T
A
= +25
C, V
CC
= 9V, 6.8V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Deflection Section (Cont'd)
X'Ray Protector Recovering Voltage
V
Hold
1.0
1.4
1.7
V
Vertical Sync PullIn Range
f
PV1
232.5H
f
PV2
296.5H
32f
H
VCO
32f
H
VCO
32f
H
VCO
H V
CC
(6.8V)
9V V
CC
QSIF
9V V
CC
PIF
9V V
CC
V/C/D
f
SC
VCO
f
SC
VCO
Pin Connection Diagram
Sync Sep Time Constant
QIF Input
QIF Input
Pedestal Clamp
B Y Output
APC Filter
Killer Filter
Flyback Pulse Input
GND
GND
Sync Sep Input
1
2
3
4
XRay Protect
Tint Control
Color Control
5
6
7
8
Contrast Control
64
63
62
61
Horiz Driver Output
60
AFC Time Constant
59
58
57
9
R Y Output
56
Vertical NFB
Vertical Output
10
G Y Output
11
55
54
Video Input
12
53
Differential Input
13
Y Output
52
Picture Sharpness
14
51
15
Brightness
50
Video Output
I/C Detector
GND
PIF AGC Time Constant
RF AGC Output
Video Detector Tank
16
17
Bypass
18
RF AGC Delay
19
20
PIF Input
49
Chroma Input
48
ACC Filter
47
46
45
Video Detector Tank
21
PIF Input
44
AFT Tank/Defeat
AFT Output
22
PIF AGC Time Constant
23
43
42
4.5MHz Output
24
41
GND
25
40
I/C Detector
26
39
27
QIF AGC Time Constant
38
Audio Input
Volume Control
FM Detector Tank
NFB
Preamp Output
28
37
SIF Input
29
36
SIF Bias
30
35
Detector Output
31
34
32
FM Detector Tank
33
2.270 (57.65) Max
1
32
64
33
.708 (18.0)
Min
.750 (19.0)
.236
(6.0)
Max
.106 (2.7) Min
.070 (1.78)
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