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What is LM1881M?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "LM1881 Video Sync Separator".


LM1881M Datasheet PDF - National Semiconductor

Part Number LM1881M
Description LM1881 Video Sync Separator
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 


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February 1995
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 fast-
er horizontal rate video signals The vertical output is pro-
duced 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 oc-
cur within the externally set delay period such as might be
the case for a non-standard video signal
Features
Y AC coupled composite input signal
Y l10 kX input resistance
Y k10 mA power supply drain current
Y Composite sync and vertical outputs
Y Odd even field output
Y Burst gate back porch output
Y Horizontal scan rates to 150 kHz
Y Edge triggered vertical output
Y Default triggered vertical output for non-standard video
signal (video games-home computers)
Connection Diagram
LM1881N
Order Number LM1881M or LM1881N
See NS Package Number M08A or N08E
TL H 9150 – 1
PAL in this datasheet refers to European broadcast TV standard ‘‘Phase Alternating Line’’ and not to Programmable Array Logic
C1995 National Semiconductor Corporation TL H 9150
RRD-B30M115 Printed in U S A

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LM1881M equivalent
Application Notes (Continued)
FIGURE 2 (a) Composite Video (b) Composite Sync (c) Vertical Output Pulse
(d) Odd Even Field Index (e) Burst Gate Back Porch Clamp
TL H 9150 – 3
Components Optional
See Text
FIGURE 3
5
TL H 9150 – 4


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LM1881M datasheet


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