LM1279N National Semiconductor, LM1279N Datasheet - Page 6

• Manufacturer Part Number: LM1279N
• Description: IC VIDEO AMP SYS 110MHZ 20-DIP
• Manufacturer: National Semiconductor

Specifications of LM1279N

• Applications: General Purpose
• Number Of Circuits: 3
• -3db Bandwidth: 110MHz
• Current - Supply: 80mA
• Current - Output / Channel: 28mA
• Voltage - Supply, Single/dual (±): 7.5 V ~ 8.5 V
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM1279N

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Pin
No.
Pin Descriptions
19
20
10
12
14
17
11
13
15
18
1
2
3
5
8
4
7
9
6
Red OSD Input
Blue OSD Input
Green OSD Input
V
Red Video In
Green Video In
Blue Video In
Red Clamp Cap
Green Clamp Cap
Blue Clamp Cap
Ground
Contrast
Blue Drive
Green Drive
Red Drive
Sandcastle Input
Blue Video Out
Green Video Out
Red Video Out
CC1
Name
Pin
Schematic
6
These are standard TTL inputs. An OSD
signal at any of the three pins will
automatically switch the pre-amp into the
OSD mode. 7 colors, including white, are
available.
Power supply pin (excluding output stage)
Video inputs. These inputs must be AC
Coupled with a minimum of a 1 µF cap, 10
µF is preferred. A series resistor of about
33
The external clamp cap is charged and
discharged to the correction voltage
needed for DC restoration. 0.1 µF is the
recommended value.
Ground pin.
Contrast control pin:
Drive control pins:
The sandcastle input allows for blanking
only, or blanking with DC restoration.
Blanking requires a 2V input. Clamping
with blanking requires a 4V input.
Video output. For proper black level the
output must drive 390
4V - no attenuation
0V - over 40 dB attenuation
4V - no attenuation
0V - 20 dB attenuation
must be used for ESD protection.
Description
impedance.