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SNLS384G – FEBRUARY 1995 – REVISED JUNE 2015 LM1881 Video Sync Separator
1 Features 3 Description The LM1881 Video sync separator extracts timing
information including composite and vertical sync,
burst or back porch timing, and odd and even field
information from standard negative going sync NTSC,
PAL (1) and SECAM video signals with amplitude from
0.5-V to 2-V p-p. The integrated circuit is also
capable of providing sync separation for nonstandard, 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. 1 AC Coupled Composite Input Signal
>10-kΩ Input Resistance …
