LM1881 Video Sync Separator | TI.com

LM1881 (ACTIVE)

Video Sync Separator

Video Sync Separator - LM1881
Datasheet
 

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 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

  • AC Coupled Composite Input Signal
  • >10-kΩ Input Resistance
  • <10-mA Power Supply Drain Current
  • Composite Sync and Vertical Outputs
  • Odd and Even Field Output
  • Burst Gate or 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)

Parametrics

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Part number Order Function Power consumption (mW) Supply voltage (V) Control interface Formats supported Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LM1881 Order now Sync separator     25     5
5 to 12    
Pin     NTSC
SECAM
Bi-level sync only
PAL    
0 to 70     PDIP | 8
SOIC | 8    
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
LMH1980 Order now Sync separator     35     3.3
3.3 to 5    
Pin     NTSC
SECAM
SD/PC bi-level and HD tri-level
720p
1080i/p
PC Sync on Green (VESA)
576i/p
480i/p    
-40 to 85     VSSOP | 10     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)    
LMH1981 Order now Sync separator     30     3.3
3.3 to 5    
Pin     SD bi-level and HD tri-level sync
NTSC
720p
1080i/p
576i/p
480i/p
PAL    
-40 to 85     TSSOP | 14     14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)