LM1881
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SNLS384F –FEBRUARY 1995–REVISED MARCH 2013
LM1881 Video Sync Separator
Check for Samples: LM1881
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FEATURES
DESCRIPTION
The LM1881 Video sync separator extracts timing
information including composite and vertical sync,
burst/back porch timing, and odd/even field
information from standard negative going sync NTSC,
PAL (1) 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.
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AC Coupled Composite Input Signal
>10 kΩ Input Resistance
<10 mA Power Supply Drain Current
Composite Sync and Vertical Outputs
Odd/Even Field Output
Burst Gate/Back Porch Output
Horizontal Scan Rates to 150 kHz
Edge Triggered Vertical Output
Default Triggered Vertical Output for Non-
standard Video Signal (Video Games-Home
Computers)
(1) PAL in this datasheet refers to European broadcast TV
standard “Phase Alternating Line”, and not to Programmable
Array Logic.
Connection Diagram
Figure 1. LM1881N
See Package Number D0008A or P0008E
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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