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PDF NTE1790 Data sheet ( Hoja de datos )
| Número de pieza | NTE1790 | |
| Descripción | Integrated Circuit Video IF / Chroma Deflection | |
| Fabricantes | NTE | |
| Logotipo |  |
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NTE1790
Integrated Circuit
Video IF, Chroma Deflection
Description:
The NTE1790 combines all the functions required for an NTSC color TV system on a 64–Lead DIP
shrink type plastic package. This device is designed to have wide application capability, from a funda-
mental CTV application to a high–end MPX CTV with quasi–parallel SIF system, with minimal external
parts and adjustments. A quasi–parallel SIF system assures buzz free sound reproduction.
Features:
PIF Section
D 3–Stage 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
Quasi–Parallel Inter Carrier Detector
D 3–Stage Variable Gain Intercarrier IF Amplifier
D Independent Peak AGC
D Intercarrier Detector with 90 deg. Carrier Shifter
SIF Section:
D 3–Stage 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 Uni–Color 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 Uni–Color Control Circuit
D Adjustment Free APC Circuit
D Tint Control Circuit With Sync Pulse Output
D Color Differential Outputs
1 page  
AC Characteristics (Cont’d): (TA = +25°C, VCC = 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
Demod Relative Amplitude
ER
EG
EB
R/B
3.9
1.3
3.9
0.71
4.6
1.54
4.6
0.84
5.9
2.0
5.9
0.97
VP–P
VP–P
VP–P
G/B 0.23 0.29 0.35
Demod Relative Phase R–B 102 109 116 deg.
G–B
227 242 252 deg.
Demod Output Residual Carrier
Deflection Section
ECR
ECG
ECB
– – 300 mVP–P
– – 300 mVP–P
– – 300 mVP–P
Pin57 Input Current
Sync Signal Delay Time
Pin56 Terminal Voltage
Pin56 Output Current
Gate Pulse Width
Gate Pulse Delay
Chroma Sweep Pulse Width
Vertical Masking Pulse (Gate)
IR57
tpdr
tpdf
V56
IO56
Tpw8
tpd8
Tcwt
––1
0 40 100
0 60 100
5.2 5.7 6.2
2.0 3.0 4.9
2.7 3.0 3.6
0.2 0.4 0.6
– 8H –
256.25H to 10.25H
µA
ns
ns
V
µA
µs
µs
Vertical Masking Pulse (Horizontal AFC)
256.25H to 10.25H
Vertical Sync Integrating Time Constants
Vertical Retrace Pulse Width
Vertical Amp Gain
Vertical Amp Input Dynamic Range
Vertical Amp Output Dynamic Range
Vertical Amp Maximum Output Current
Horizontal 32fH Oscillator Starting Voltage
Horizontal Drive Output Starting Voltage
Horizontal Drive Output Starting Current
Horizontal Oscillator Frequency
fH temperature Drift
fH VCC Coefficient
Horizontal Output Duty
Horizontal Output Saturation Voltage
fH Pull–In Range
fH Hold Range
X’Ray Sense Voltage
X’Ray Sense Current
TVS
TVO55
GVA54
Vi55
VH55
VL55
IO54
VCC581
VCC582
ICC58
fH
dfHT
dfHV
TO64
VOL64
dfpull
dfhold
Vin1
Iin1
12 16 34
10H / 11H
8.7 9.5 10.7
1.1 1.6
–
5.1 6.2 7.3
1.1 1.9 3.1
11.2 16.8 25.0
1.7 2.0 2.5
2.7 3.0 3.2
4.0 5.4 6.8
15654 15734 15814
40 70 100
0 –20 –40
39 41 43
0 0.2 0.3
±550 ±750 ±880
±550 ±750 ±880
1.1 1.3 1.5
0.05 0.4 1.0
µs
dB
V
V
V
mA
V
V
mA
Hz
Hz
Hz
%
V
Hz
Hz
V
µA
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet NTE1790.PDF ] | |
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