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 LM1881 (and LM1881‑X) extracts composite and vertical sync, burst/back‑porch, and odd/even field information from NTSC, PAL and SECAM video signals. It operates from a single 5 V‑12 V supply and requires only a few external components.
The device offers four main outputs – composite sync, vertical sync, burst gate/back‑porch, and an odd/even field indicator – useful for video processing, frame memory storage, and color burst recovery. Detailed electrical characteristics, absolute maximum ratings, and application notes are provided for design reference.
| Supply Voltage | 5 V – 12 V DC |
|---|---|
| Typical Supply Current (5 V) | 5.2 mA |
| Input Threshold Voltage | 70 mV (typical) |
| Output Sink Current (Pins 1,3,5) | 5 mA |
| Operating Temperature (LM1881‑X) | -40 °C – +85 °C |
It operates from a single supply voltage between 5 V and 12 V DC.
Typical supply current is 5.2 mA at a 5 V supply.