EL4581 Video Sync Separator
The EL4581 is a Video Sync Separator IC that is manufactured using Elantec’s high-performance analog CMOS process. EL4581 extracts timing information from standard negative-going video sync found in NTSC, PAL, and SECAM broadcast systems.
Pin Description of EL4581:
|
Pin Number |
Pin Name |
Description |
|
1 |
Composite Sync Output (CSOUT) |
This is an output pin which provides the stripped out composite signal |
|
2 |
Composite Video In (CVIN) |
This is the input pin to which the video with composite is fed |
|
3 |
Vertical Sync Out |
This pin outputs the composite free filtered video signal |
|
4 |
Ground (GND) |
Connected to the ground of the system |
|
5 |
Burst/Back Out (BPOUT) |
Outputs burst or back porch timing signal |
|
6 |
Reset |
Used to reset the IC |
|
7 |
Odd/Even Output (OEOUT) |
|
|
8 |
VCC |
Powered normally with +5V or +12V |
EL4581 Specifications & Features:
- NTSC, PAL, SECAM, non-standard video sync separation
- Fixed 70mV slicing of video input levels from 0.5VP-P to 2VP-P
- Precision 50% slicing, internal caps
- Single +5V supply
- Supply Current: 1.5mA
- Composite Propagation Delay: 260 ns
- Temperature Range: -40 to +85
- Composite, vertical sync output
- Odd/even field output
- Burst/back porch output
- Available in 8-Pin PDIP and SOIC packages
Note: Complete Technical Details can be found at the EL4581 datasheet given at the end of this page.
Equivalent for EL1881: LM1881, EL188181
Alternatives Video sync separators: LM1981, EL1993, EL4583
Where to use the EL4581 Video Sync Separator IC:
The EL14581 is used in many video-related application where composite video and RGB video is involved. It can also be used in non-standard formats and with computer graphics systems at higher scan rates, by adjusting a single external resistor. EL4581 can be used to replace the industry-standard LM1881, offering improved performance and reduced power consumption.
So if you are looking for a composite video conversion IC and a replacement for LM1881then LM4581 might be of interest to you.
How to use EL4581:
EL1881 can work with a minimum number of components. Along with the IC, it only requires one resistor and a couple of capacitors. The typical connection diagram for EL4581 is shown below.
The composite video input is fed to pin 2 via a 0.1µF capacitor. The capacitor acts as a parasitic capacitor to filter noise. Resistor (RSET) at pin 6 determines the value of the reference current. LM4581 IC has an operating voltage from 5-12V, but normally it is operated either in +5V or +12V. The output video which is free of composite and can be used on RGB monitors can be obtained from pin 3.
Applications of EL4581:
- PCMCIA applications
- A/D drivers
- Line drivers
- Portable computers
- High-speed communications
- RGB applications
- Broadcast equipment
- Active filtering
2D-Model of EL4581 (PDIP):
Dimensions for EL4581 IC is given below. These dimensions are for the PDIP package. If you are using different package IC please refer to the EL4581 datasheet.
