The LM1270 is a supplementary IC to the low cost chipset (LCCS). It modifies the video stream prior to the LCCS preamplifier and enhances pictures or motion video through special intermediate frequency boosting. The 200 MHz bandwidth ensures minimal impact on the video change when adding the LM1270. Other functions include measuring the length of the active video and its front porch time, calibration mode for determining image coordinates, data receiver for receiving encoded data on video, window highlight with respect to sync, and video source selection with two analog inputs.
The LM1270 is a supplementary IC designed to enhance video streams before the low‑cost chipset (LCCS) pre‑amplifier. It provides image‑enhancement by intermediate frequency boosting and includes video auto‑sizing, calibration, data reception, and window highlight features.
Key functions include programmable clamp and blank generators, I²C‑compatible video detection, programmable window and emphasis control, and support for two analog video inputs. The device is intended for monitors that use the LCCS chipset and offers a standard 0.7 V video output compatible with any video pre‑amp.
| Supply Voltage (Pins 9 and 18) | 6.0 V |
|---|---|
| Video Output Voltage Range | 4.75 V < VOG < 5.25 V |
| Video Input Voltage Range | 0.0 V < VIY < 1.0 V |
| Video Bandwidth | 200 MHz |
| Maximum Supply Current (Typical) | 235 mA |
The LM1270 provides a video bandwidth of 200 MHz.
The LM1270 supports two analog video inputs per channel, for a total of four video inputs.
The device requires a 6.0 V supply on pins 9 and 18.
Yes, all functions of the LM1270 are controlled through an I²C‑compatible bus.