LM1881NNOPB National Semiconductor, LM1881NNOPB Datasheet

LM1881NNOPB

Manufacturer Part Number

LM1881NNOPB

Description

DIP-8

Manufacturer

National Semiconductor

Datasheet

1.LM1881NNOPB.pdf (12 pages)

Specifications of LM1881NNOPB

Date_code

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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.

Connection Diagram

*PAL in this datasheet refers to European broadcast TV standard “Phase Alternating Line”, and not to Programmable Array Logic.

Order Number LM1881M or LM1881N (0˚C to +70˚C)

DS009150

See NS Package Number M08A or N08E

LM1881N

Features

n AC coupled composite input signal

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)

10 kΩ input resistance

10 mA power supply drain current

00915001

www.national.com

May 2006

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