STV7778S

The STV7778S is a monolithic integrated circuit assembled in a 42 pins shrunk dual in line plastic package.
 
The goal of this IC is to control all the functions related to the horizontal and vertical deflection in a multimodes or multisync monitor.

As can be seen in the block diagram, the STV7778S includes the following functions :
- Positive or Negative sync polarities,
- Auto-sync horizontal processing,
- H-PLL lock/unlock identification,
- Auto-sync Vertical processing,
- East/West signal processing block,
- B+ controller,
- Safety blanking output.

An internal metal shield give to the STV7778S more immunity against electromagnetic and electrostatic fields, and therefore, additional safety for critical applications (for example, in case of CRTs with small coated area).