LA7391 Integrated Circuit

The LA7391 is a monolithic integrated circuit (IC) originally developed by Sanyo, used primarily in videocassette recorders (VCRs) and video signal processing systems for managing video capture and switching circuits.

Here are the main technical specifications and features of the component:

1. Main Function

• Application: Video signal processing circuit / Video Switch for VCRs and cameras.

2. Electrical and Physical Characteristics (Typical)

• Supply voltage ($V_{CC}$): Typically between 4.5V and 9V (a common standard value for devices in this category).
• Operating temperature: From -20°C to +75°C.
• Package: Usually available in a 14 or 16-pin DIP (Dual In-line Package) format, or in a flat version depending on the specific manufacturer variant.

3. Key Functionality

• High-speed switching of composite video signals.
• Very low distortion and excellent channel isolation (reduced crosstalk).
• Adequate bandwidth for PAL/NTSC standard video signals.

Note: As this is an obsolete (vintage) component, complete datasheets with detailed circuit diagrams can mainly be found on historical semiconductor archives or hard-to-find electronic component websites.