LM1881N Video Sync Separator DIP-8 (LM1881N DIP IC)
The LM1881N is a specialized monolithic integrated circuit designed to extract timing information from standard negative-going composite video signals. It automatically detects and separates vertical sync, horizontal sync (from the composite sync output), odd/even fields, and burst gate/back porch timing. This IC is highly versatile as it works with NTSC, PAL, and SECAM video standards without requiring external filters or frequency adjustments.
This IC is primarily used in video signal processing, On-Screen Display (OSD) insertion, and video capture systems. It is a critical component for Arduino electronics projects in India that involve overlaying text or graphics onto an analog video feed, stabilizing shaky video signals, or synchronizing DIY gaming consoles with modern displays.
Key Features
- Extracts vertical and composite sync from standard video signals
- Odd/even field detection for interlaced video
- Burst gate/back porch output for color synchronization
- Works with NTSC, PAL, and SECAM standards
- Low power consumption (typically 5mA)
- Operates from a single 5V to 12V supply
- Internal precision timing without external components
- High input impedance to prevent video signal loading
Specifications
- IC Type = Video Sync Separator
- Supported Video Standards = NTSC, PAL, SECAM
- Supply Voltage = 4.5V to 13.2V (5V Typical)
- Logic Family = Linear / Analog
- Package Type = DIP
- Number of Pins = 8
- Mounting Type = Through-Hole
- Operating Temperature = 0 to 70 degrees Celsius
Interfaces
- VIDEO IN = Composite Video Input (AC Coupled)
- COMP SYNC OUT = Composite Sync Output
- VERT SYNC OUT = Vertical Sync Pulse Output
- ODD/EVEN OUT = Field Identification Output
- BURST/BACK PORCH = Color Burst Gate Output
- R-SET = External Resistor for Internal Bias
- VCC = Positive Supply Voltage (5V-12V)
- GND = Ground (0V)
