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Chroma/Luminance Processor. NTE844 Datasheet

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Chroma/Luminance Processor. NTE844 Datasheet
















NTE844 Processor. Datasheet pdf. Equivalent













Part

NTE844

Description

Integrated Circuit Single Chip TV Chroma/Luminance Processor



Feature


NTE844 Integrated Circuit Single Chip TV Chroma/Luminance Processor Description : The NTE844 is an integrated circuit i n a 28–Lead DIP type package and cont ains all the required circuits function s between the video detector and the pi cture tube RGB driver stages of a color television receiver. The NTE844 decode s the chrominance signals and then prod uces three different.
Manufacture

NTE Electronics

Datasheet
Download NTE844 Datasheet


NTE Electronics NTE844

NTE844; color signals that are internally combi ned with the luminance to develop the R GB signals. The picture saturation, hue and brightness DC controls are externa lly adjustable. The AFPC, ACC, Dynamic flesh control, Beam limiting and Gate b lack level (Brightness)control are serv o loops used to stabilize the RGB outpu t and reduce frequent manual adjustment . The automatic be.


NTE Electronics NTE844

am limiter circuit reduces picture contr ast and brightness to prevent excessive drive output at the picture tube. Feat ures: D All chroma processing and demod ulating circuitry on a single chip. D P hase–locked subcarrier regeneration u tilizing sample–and–hold techniques . D Supplementary ACC with overload det ector D Linear DC controls for chroma g ain and tint D Dynamic “.


NTE Electronics NTE844

flesh correction” D Balanced chroma de modulators with low output impedance fo r direct coupling D Internal RF filteri ng D Few external components D Automati c beam limiter D Chroma luminance track ing picture control Absolute Maximum Ra tings: DC Supply Voltage Between Pin23 and Pin8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.0V D.





Part

NTE844

Description

Integrated Circuit Single Chip TV Chroma/Luminance Processor



Feature


NTE844 Integrated Circuit Single Chip TV Chroma/Luminance Processor Description : The NTE844 is an integrated circuit i n a 28–Lead DIP type package and cont ains all the required circuits function s between the video detector and the pi cture tube RGB driver stages of a color television receiver. The NTE844 decode s the chrominance signals and then prod uces three different.
Manufacture

NTE Electronics

Datasheet
Download NTE844 Datasheet




 NTE844
NTE844
Integrated Circuit
Single Chip TV Chroma/Luminance Processor
Description:
The NTE844 is an integrated circuit in a 28–Lead DIP type package and contains all the required cir-
cuits functions between the video detector and the picture tube RGB driver stages of a color television
receiver. The NTE844 decodes the chrominance signals and then produces three different color sig-
nals that are internally combined with the luminance to develop the RGB signals. The picture satura-
tion, hue and brightness DC controls are externally adjustable. The AFPC, ACC, Dynamic flesh con-
trol, Beam limiting and Gate black level (Brightness)control are servo loops used to stabilize the RGB
output and reduce frequent manual adjustment. The automatic beam limiter circuit reduces picture
contrast and brightness to prevent excessive drive output at the picture tube.
Features:
D All chroma processing and demodulating circuitry on a single chip.
D Phase–locked subcarrier regeneration utilizing sample–and–hold techniques.
D Supplementary ACC with overload detector
D Linear DC controls for chroma gain and tint
D Dynamic “flesh correction”
D Balanced chroma demodulators with low output impedance for direct coupling
D Internal RF filtering
D Few external components
D Automatic beam limiter
D Chroma luminance tracking picture control
Absolute Maximum Ratings:
DC Supply Voltage Between Pin23 and Pin8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.0V
Device Dissipation (Up to TA = +55°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.27W
Derate Above TA = +55°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.3mW/°C
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 1/16” from case, 10sec max), TL . . . . . . . . . . . . . . . . . +265°C




 NTE844
Typical Performance Characteristics:
Function
Nominal Supply
Nominal Dissipation
Oscillator Stability
Supply Variation 1014 V
Variation with Temperature
(T = +50°C)
AFPC Characteristics
DC Loop Gain
PullIn Range
ACC Characteristic
100% Chroma Input Level
3dB Point
HueControl Range
SaturationControl Range
Demodulator Characteristics:
RY
BY
GY
Bandwidth (Chroma)
Flesh Control
Chroma Overload Control
Picture Control
Brightness Control
Beam Limiting
Luma Bandwidth
Sandcastle Input
1.2V to 2.3V
> 3.3V
Maximum Linear Output
R
G
B
Typical Data
11.2V
500mW
5Hz
25Hz
33Hz/Degree
±500Hz
250mVpp on Red Bar
at 20% Nominal Input Level
100°
40dB Min
Relative
Amplitude
Angle
1.0 93°
1.2 2°
0.3 258°
900kHz
Primary Control in the +1 HalfPlane
Two Levels
40dB
Black Level Clamped on 3V to 5V Level
On Picture and Brightness Controls
5MHz Min
Blanking
Burst gate
5V
3V
3.7V




 NTE844
Pin Connection Diagram
Chroma Output 1
Chroma Control 2
Chroma Input 3
Overload Filter 4
ACC, Killer Filter 5
ACC, Killer Filter 6
Sandcastle Pulse 7
GND 8
APC Filter 9
APC Filter 10
OSC Input 90° 11
OSC Input 180° 12
OSC Output 13
Tint Control 14
28 Beam Limiter
27 Luminance
26 Picture Control
25 Low Pass Filter
24 Bright Control
23 VCC
22 Blue
21 Red
20 Green
19 Q Carrier Input
18 I Carrier Input
17 Demodulator Chroma Input
16 Overload, Flesh Disable
15 Carrier Output
14 1
15
1.469 (37.32) Max
.100 (2.54)
1.300 (33.02)
28
.250
(6.35)
.540
(13.7)
.122
(3.1)
Min
.600 (15.24)




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