HTCSEMI HT1881ARZ

The HT1881 is designed to separate sync signals from composite source video signals. It operates with source video input amplitudes ranging from 0.5Vp-p to 2Vp-p. The supply voltage ranges from 5V to 12V. Beyond the power supply and input coupling capacitors, the only external components required are the internal current-setting resistor Rset and its decoupling capacitor. The HT1881 generates four sync outputs from the source signal: composite sync containing both horizontal and vertical scanning, vertical sync pulse, front/back porch clamp pulse, and odd/even field output. The HT1881 output signals can be used to lock video signals from cameras and camcorders, identify memory storage regions, recover corrupted sync signals, and provide a timing reference for decoded scan positions.

• AC-coupled input

• 10kΩ input impedance

• <10mA supply current
• Composite sync output and field output
• Odd/even output, shoulder clamp output
• Line frequency up to 150KHz for non-standard video signals with default field pulse delay output