The LM1880 is a no‑holds vertical/horizontal TV processing IC that eliminates traditional hold controls. It uses a precision VCO with a ceramic resonator and includes features such as an internal voltage regulator, adjustable APC loop parameters, and a chroma burst gate output.
The document contains a general description, absolute maximum ratings, electrical characteristics, typical application circuits, layout notes, and a full schematic. It also provides detailed component values and guidelines for modifying loop parameters and ensuring stable operation.
| Regulated Voltage (Pin 9) | 8.2‑9.2 V |
|---|---|
| VCO Reference Voltage (Pin 3) | 5 V |
| VCO Control Current (Pin 2) | 0.25‑1.0 µA |
| Horizontal Output Duty Cycle | 50 % |
| Horizontal Pull‑in Range | +600 Hz |
| Vertical Minimum Lock Frequency (Pin 12) | 55.0 Hz |
The regulated voltage on pin 9 is specified as 8.2 V to 9.2 V.
The horizontal output duty cycle is 50 %.
The horizontal pull‑in range is specified as +600 Hz.