Video Sync Separator - LM1881

LM1881 (ACTIVE)

Video Sync Separator

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

Features

  • 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)

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Parametrics Compare all products in Video Timing

 
Function
Power Consumption (mW)
Pin/Package
Supply Voltage (V)
Control Interface
Formats Supported
Operating Temperature Range (C)
LM1881 LMH1980 LMH1981
Sync Separator     Sync Separator     Sync Separator    
25     35     30    
8PDIP
8SOIC    
10VSSOP     14TSSOP    
5
5 to 12    
3.3
3.3 to 5    
3.3
3.3 to 5    
Pin     Pin     Pin    
NTSC
SECAM
Bi-level sync only
PAL    
NTSC
SECAM
SD/PC bi-level and HD tri-level
720p
1080i/p
PC Sync on Green (VESA)
576i/p
480i/p    
SD bi-level and HD tri-level sync
NTSC
720p
1080i/p
576i/p
480i/p
PAL    
0 to 70     -40 to 85     -40 to 85    
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