LM1283N National Semiconductor, LM1283N Datasheet - Page 10

• Manufacturer Part Number: LM1283N
• Description: IC AMP RGB VIDEO SYSTEM 28-DIP
• Manufacturer: National Semiconductor

Specifications of LM1283N

• Applications: General Purpose
• Number Of Circuits: 3
• -3db Bandwidth: 140MHz
• Current - Supply: 85mA
• Current - Output / Channel: 28mA
• Voltage - Supply, Single/dual (±): 11.4 V ~ 12.6 V
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM1283N

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Pin No.
Pin Descriptions
11
10
21
12
13
14
26
27
28
15
16
17
19
24
18
20
23
22
5
8
6
9
7
Red Video In
Green Video In
Blue Video In
V
Ground
V
Video Contrast
OSD Constrast
Blue Drive
Green Drive
Red Drive
Clamp Gate
Blank Gate
Blue Clamp Cap
Green Clamp Cap
Red Clamp Cap
Blue Video Out
Green Video Out
Red Video Out
V
CC1
REF
CC2
Pin Name
(Continued)
Schematic
10
Video inputs. These inputs must be AC
Coupled with a minimum of a 1 µF cap, 10 µF
is preferred. DC restoration is done at these
inputs. A series resistor of about 33
also be used.
Power supply pins (excluding output stage)
Ground pins. All grounds are internally
connected and must also be connected on the
PCB.
Pin used for additional filter capacitor to
internal reference. The voltage at this pin is
2.0V.
Contrast control pins:
Drive control pins:
Both pins accept TTL inputs and are active
low. The clamp gate provides DC restoration of
the video signal. The blank gate forces the
video outputs to below 200 mV.
The external clamp cap is charged and
discharged to the correction voltage needed for
DC restoration. 0.1 µF is the recommended
value.
Video output. For proper black level the output
must drive 390
Power supply pin for the output stage. There
are no internal connections to V
4V — no attenuation
0V — over 60 dB attenuation
4V — no attenuation
0V — 12 dB attenuation
impedance.
Description
CC1
should