NTE731 PDF даташит
Спецификация NTE731 изготовлена «NTE» и имеет функцию, называемую «Integrated Circuit TV Video Signal Processor». |
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Детали детали
Номер произв | NTE731 |
Описание | Integrated Circuit TV Video Signal Processor |
Производители | NTE |
логотип |
3 Pages
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NTE731
Integrated Circuit
TV Video Signal Processor
Description:
The NTE731 is an integrated circuit in a 16−Lead DIP type package and performs many of the func-
tions which are often collectively referred to as the video “jungle”. This device provides keyed AGC
for the tuner (forward and/or reverse) and the video IF (reverse), furnishes stripped synchronization
signals in both polarities, and provides low−impedance video and noise−cancelled video output
signals. The NTE731 is used as a low−cost, high−quality circuit in monochrome as well as color
TV receivers.
The circuit combines high performance with economy by eliminating the need for either AGC or
noise threshold adjustments. Positive noise gating and high sync. separator gain assure excellent
performance over a wide range of signal conditions.
Features:
D High−Impedance Video Input
D Low−Impedance Emitter−Follower Video Output
D Forward AGC for Video IF
D Delayed Forward AGC for NPN Bipolar Tuner
D Delayed Reverse AGC for PNP, MOSFET, or Tube Tuner
D Positive and Negative Sync Outputs
D Preset Noise Detector
D Single−Supply Operation
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
DC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
Device Dissipation (TA ≤ +55°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate Linearly Above +55°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.9mW/°C
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +85°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C
Lead Temperature (During Soldering, 1/32” (0.79mm) from case, 10sec max.) . . . . . . . . . . +265°C
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Electrical Characteristics: (TA = +25°C, V+ = 24V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ
Supply Current (Pulse Test)
AGC Threshold (Sync Tip Level at Video Input)
Video Input Amplitude (White Positive)
Video Output Amplitude (Low Impedance)
Noise Cancelled Video Output at VTH
(Black Positive, Gain ≅ 2)
IT24
VTH
V8
V9
V5
20 −
4.5 −
−3
−3
3.6 −
AGC to Noise Separation
Sync Input Current for Full Amplitude Outputs
Maximum Leakage Current at Pin4
Sync Outputs:
Negative Sync Low
VTH(SEP)
I$ (ON)
I$ (OFF)
V2(L)
1.1 −
−−
−−
0−
Negative Sync High
Positive Sync Low
Positive Sync High
AGC Filter:
Charge Current (Pulse Test)
V2(H)
V3(L)
V3(H)
I11(CH)
23.8 −
0−
20.1 −
12 −
Discharge Current
Leakage Current
AGC Enable:
Horizontal Keying
I11(DISCH)
I11(LEAK)
V16(ON)
1.1 −
−−
3−
Negative Sync Input Current
Maximum IF Gain−Clamp Voltage
Maximum IF Gain Bias
IF AGC Voltage:
Low
I1(ON)
V11
V12
V13(LOW)
−1
4.8 −
4.2 −
0−
High
Tuner Currents:
Reverse AGC (FET) OFF Current
V13(HIGH)
I12(OFF)
5.7 −
−−
Reverse AGC (FET) ON Current
Forward AGC (NPN) OFF Current
Reverse AGC (NPN) ON Current
Internal Noise−Lockout Time
I14(ON)
I15(OFF)
I15(ON)
T
1.8 −
−−
4.5 −
1−
Max
40
5.5
−
−
9.2
Unit
mA
V
VP−P
VP−P
V
2.2 V
100 µA
±6 µA
2.6 V
24.0 V
0.2 V
24.0 V
36 mA
2.6 mA
±6 µA
6V
− mA
5.7 V
5.2 V
3.3 V
6.0 V
±6 µA
5.5 mA
±6 µA
15 mA
63 µs
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Pin Connection Diagram
AGC Enable Sync Input 1
Separated Sync Output 2
Separated Sync Output 3
Sync Separator Input 4
Noise Cancelled Video Output 5
VCC 6
Bias 7
Video Input 8
16 Horizontal Strobe Input
15 Positive NPN Tuner
14 Negative FET or PNP Tuner
13 AGC Output
12 IF Gain Bias
11 AGC Filter
10 GND
9 Low Z Video Output
16
1
.245
(6.22)
Min
.785 (19.9)
Max
.100 (2.54)
.700 (17.7)
9
.260 (6.6) Max
8
.200 (5.08)
Max
.300
(7.62)
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