LM1276 150MHz I2C compatible RGB preamplifier with internal 512 character OSD ROM, 512 character RAM and 4 DACs
The LM1276 is an integrated CMOS CRT pre‑amplifier that provides a Hi‑Brite window generator, programmable video emphasis, and an addressable 512‑character OSD. It features four 8‑bit DAC outputs for bias and brightness control, a spot‑killer circuit, and programmable horizontal and vertical blanking.
Typical applications include 17‑inch and 19‑inch bus‑controlled monitors with OSD, and low‑cost systems using LM247x drivers. The device is supplied in a 28‑lead narrow DIP package and complies with RoHS and life‑support policies.
| Operating Frequency | 150 MHz |
|---|---|
| Package | 28‑lead narrow DIP molded plastic |
| Supply Voltage (Vcc) | 4.75 V – 5.25 V |
| Thermal Resistance to Case | 32 °C/W |
| Thermal Resistance to Ambient | 51 °C/W |
| Operating Temperature Range | -65 °C to +150 °C |
| Number of DAC Outputs | 4 (8‑bit resolution) |
| OSD ROM Size | 512 characters |
| OSD RAM Size | 512 characters |
It is supplied in an industry standard 28‑lead narrow DIP molded plastic package.
The LM1276 includes four 8‑bit DAC outputs for bias and brightness control.
The device operates from –65 °C up to +150 °C.