Description:

The NTE7049 is a CMOS LSI sync generator in a 24–Lead DIP type package that produces all the timing signals required to drive a fully 2–to–1 interlaced 525–line 30–frame/second, or 625–line 25–frame/second TV camera or video processing system. A complete sync waveform is produced which begins each field with six serrated vertical sync pulses, preceded and followed by six half–width double frequency equalizing pulses.

The sync output is gated by the master clock to preserve horizontal phase continuity during the vertical interval. The NTE7049 can be operated either in “genlock” mode, in which it is synchronized with a reference sync pulse train from another TV camera, or in “stand–alone” mode, in which it is synchronized with a local on–chip crystal oscillator (the crystal and two passive components are off chip). Also, the circuit can sense the presence or absence of a reference sync pulse train and automatically select the “genlock” or “stand–alone” mode.

A frame sync pulse is produced at the beginning of every odd field. The vertical counter can be reset to either the first equalizing pulse or the first vertical sync pulse of the vertical interval.

Features:

• Interlaced Composite Sync Output

• Automatic Genlock Capability

• Crystal Oscillator Operation

• 525 or 625 Line Operation

• Vertical Reset Option

• Wide Power Supply Operating Voltage: 4V to 15V

Applications:

• Cameras

• Monitors and Displays

• CATV

• Teletext

• Video Games

• Sync Restorer

• Video Service Instruments