GS4881-CTA集成电路（IC）的视频处理规格书PDF中文资料

描述 Description

The GS1881, GS4881 and GS4981 are general purpose sync separators for use in a wide variety of video applications. The devices extract the timing information from composite video signals with scan rates from 15 to 130kHz.

The GS1881 is a drop-in replacement for the industry standard LM1881 with much improved performance. The device generates composite sync, vertical sync, back porch and odd/even field signals. The GS4881 is identical to the GS1881 but features a noise immune back porch pulse which maintains a constant H rate during the vertical interval. The GS4981 is identical to the GS4881, except that it provides horizontal sync in place of the odd/even output.

特性 Features

• noise tolerant odd/even flag, back porch and horizontal sync pulse

• fast recovery from impulse noise

• excellent temperature stability

• 0.5V to 4Vpp input signal amplitude with 5V supply

• well-controlled clamp discharge current and slicing level

• programmable horizontal scan rate (up to 130kHz)

• composite, vertical, back porch, odd/even (GS1881, GS4881), horizontal (GS4981) outputs

• predictable vertical output pulse width with default trigger for non-standard video signals

• Pb-free and Green

• 5V to 12V supply voltage range

• pin compatible with LM1881 sync separator