LM1881 is a video synchronization separation chip for TV signals. It can directly synchronize and separate TV signals and obtain accurate

The required video image signal, the user can perform sequential logic control on the synchronization signal according to their needs. LM1881 is widely used in the synchronization and separation of video signals, such as portable frame grabbers, video surveillance video controllers, video cameras based on imaging systems Image acquisition, etc. The LM1881/TR of the HG brand is a completely independent brand. Guangdong Huaguan production, Shenzhen Xingyujia Technology is responsible for sales and technical support. A perfect substitute for imported brands. Realized the connection between P and P.

Main features, basic principle and pin function, several applications of it are given

In addition to the image signal, the video signal also includes

horizontal sync signal, horizontal blanking signal, vertical sync signal, vertical blanking

Signal and slot pulse signal, pre-equalization pulse, post-equalization pulse

etc., therefore, if you want to collect the video signal, it must be accurate

To grasp the logical relationship between various signals. LM1881 is aimed at

It is produced by the synchronous separation of video signals, which is the

Processing provides great convenience.

The LM1881 can operate from a standard negative polarity NTSC of 0.5 to 2 V

system, PAL system, SECAM system video signal to extract composite synchronization,

Field synchronization, odd and even field identification and other signals, these signals are image data

The synchronization signals required for word acquisition, with them, can determine the acquisition

Which field and line is the set point. LM1881 can also

The video signal is synchronously separated and produced by a fixed time delay.

Generates the default output as field sync output.

1 Main features of LM1881 (Xingyujia Technology) chip

The main features of LM1881 are as follows:

1) AC-coupled composite video input signal source;_2) Input impedance greater than 10 kΩ;_3) Current consumption less than 10 mA;_4) Composite sync and vertical sync output;_5) Odd and even field output;_6) Color burst output; _7) Horizontal scan frequency up to 150 kHz ;_8) Edge-triggered field output;_9) Default field sync for non-standard video signals

output.

In addition to the image signal, the video signal also includes

horizontal sync signal, horizontal blanking signal, vertical sync signal, vertical blanking

Signal and slot pulse signal, pre-equalization pulse, post-equalization pulse

etc., therefore, if you want to collect the video signal, it must be accurate

To grasp the logical relationship between various signals. LM1881 is aimed at

It is produced by the synchronous separation of video signals, which is the

Processing provides great convenience.

The LM1881 can operate from a standard negative polarity NTSC of 0.5 to 2 V

system, PAL system, SECAM system video signal to extract composite synchronization,

Field synchronization, odd and even field identification and other signals, these signals are image data

The synchronization signals required for word acquisition, with them, can determine the acquisition

Where is the focus, which line? LM1881 (Xingyujia Technology) can also be used for non-standard

The video signal is synchronously separated and produced by a fixed time delay.

Generates the default output as field sync output.