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LM1881 Fiches technique(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce LM1881
Description  Video Sync Separator
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1881 Fiches technique(HTML) 1 Page - National Semiconductor (TI)

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LM1881
Video Sync Separator
General Description
The LM1881 Video sync separator extracts timing informa-
tion including composite and vertical sync, burst/back porch
timing, and odd/even field information from standard nega-
tive going sync NTSC, PAL* and SECAM video signals with
amplitude from 0.5V to 2V p-p. The integrated circuit is also
capable of providing sync separation for non-standard,
faster horizontal rate video signals. The vertical output is
produced on the rising edge of the first serration in the
vertical sync period. A default vertical output is produced
after a time delay if the rising edge mentioned above does
not occur within the externally set delay period, such as
might be the case for a non-standard video signal.
Features
n
AC coupled composite input signal
n >
10 k
Ω input resistance
n <
10 mA power supply drain current
n
Composite sync and vertical outputs
n
Odd/even field output
n
Burst gate/back porch output
n
Horizontal scan rates to 150 kHz
n
Edge triggered vertical output
n
Default triggered vertical output for non-standard video
signal (video games-home computers)
Connection Diagram
LM1881N
00915001
Order Number LM1881M or LM1881N (0˚C to +70˚C)
See NS Package Number M08A or N08E
*PAL in this datasheet refers to European broadcast TV standard “Phase Alternating Line”, and not to Programmable Array Logic.
May 2006
© 2006 National Semiconductor Corporation
DS009150
www.national.com


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