EL4583 Video Sync Separator

21 April 2020 - 0 Comments

EL4583 Video Sync Separator

EL4583 Pinout

The EL4583 is a high-performance multi-format sync separator that is manufactured using Intersil’s high-performance analog CMOS process. It is ideal for use in a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems. It provides composite sync, vertical sync, burst/back porch timing, and odd/even field detection.

EL4583 Pinout Configuration

Pin Number	Pin Name	Description
1	Filter Cut-Off	Filter Cut-off Pin used to determine the input filter characteristic
2	Set Detect Level	Used to determine the value of the minimum signal which triggers the loss of signal output
3	Composite Sync Output	This is an output pin which provides the stripped out composite signal
4	Filter Input	Filter input pin. Input Pin of 3 pole active filter
5	Vertical Sync Output
6	Digital Ground	This is the ground return for digital buffer outputs.
7	Filter Output	Filter Output Pin. The output pin of 3 pole active filter
8	Video-Input	This is the input pin to which the video is fed
9	Level Output	Level Output Pin
10	No Signal Detect Output	This is a digital output pin which goes high when either a) loss of input signal or b) the input signal level falls below a predetermined amplitude.
11	Burst/Back Porch Output	Burst/Back Porch Timing Output
12	RSET	Resistor (RSET) determines the value of the reference current.
13	Odd/Even Output	Odd/ Even Output Pin
14	VDD	Supply Voltage
15	Horizontal Sync Output	This pin outputs the composite free filtered video signal
16	Analog Ground	Ground

EL4583 Specifications and Features

NTSC, PAL, and SECAM sync separation
Single supply Voltage: +5V
Precision 50% slicing
Built-in programmable color burst filter
Decodes non-standard vertical
Horizontal sync output
Sync. pulse amplitude output
Low-power CMOS
Detects loss of signal
Available in 16 Pin PDIP SO packages

Note: Complete Technical Details can be found at the EL4583 datasheet given at the end of this page.

Equivalent for EL4583: LM1881, EL4581

Alternatives Video sync separators: EL1993, LMH1981

Where to use the EL4583 Video Sync Separator IC

The EL4583 has used a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems. One noticeable main application of the IC is to convert sync over composite videos (HSYNC + VSYNC + CVBS) into CSYNC video (HSYNC+VSYNC) by removing the composite video (CVBS) aspects. It provides composite sync, vertical sync, burst/back porch timing, and odd/even field detection. The LMH1981 automatically detects the input video format, eliminating the need for programming using a microcontroller.

So if you are looking for a composite video conversion IC, then EL4583 might be of interest to you.

How to use EL4583 IC

A test circuit of EL4583 from its datasheet is given below. EL4583 can work with the minimum number of components.

EL4583 Application Circuit

The single supply voltage of this IC is 5V. The video signal is AC coupled to pin 4 via the capacitor C8, nominally 0.1µF. You can use an external pull-up resistance from pin 4 to the 5V supply to exercise some control over the value of the input time constant. The loss of video signal can be detected by monitoring the No Signal Detect Output pin 10.