EL1881CS

Video Processing Overview

The EL1881CS is a video sync separator manufactured using Elantec’s high-performance analog CMOS process. It extracts sync timing information from standard and non-standard video inputs, providing composite sync, vertical sync, burst/back porch timing, and odd/even field detection. The device features fixed 70mV sync tip slicing for edge detection when the video input level ranges between 0.5VP-P and -2VP-P, corresponding to a sync tip amplitude of 143mV to 572mV. A single external resistor sets all internal timing to accommodate various video standards. It operates on a single +5V supply with a typical supply current of 1.5mA.

Video Processing Feature Summary

• Extracts sync timing information from both standard and non-standard video inputs
• Provides composite sync, vertical sync, burst/back porch timing, and odd/even field detection outputs
• Features fixed 70mV sync tip slicing for reliable sync edge detection across specified input levels
• Allows timing adjustment for various video standards via a single external resistor

Video Processing Applications

• Video amplifiers
• PCMCIA applications
• A/D drivers
• Line drivers
• Portable computers

Video Processing Procurement Notes

Verify the manufacturer origin, as Intersil assets were acquired by Renesas Technology Corp. Confirm the package type matches requirements, as the device is available in 8-pin PDIP and SO packages. Ensure the specific suffix corresponds to the desired packaging configuration. Check for obsolescence status or lifecycle notifications, as older CMOS components may have limited availability or end-of-life designations from the current manufacturer.

Video Processing Selection Notes

Select this component when low power consumption is critical, given its 1.5mA typical supply current. It is suitable for designs requiring a single +5V supply rail. Use this part when flexible timing adjustment for different video standards is needed via an external resistor. Consider it for applications requiring simultaneous access to composite, vertical, and field detection signals without complex external circuitry.

Video Processing Part Context

The EL1881CS belongs to the family of video interface integrated circuits originally developed by Elantec Semiconductor before being integrated into Intersil and subsequently Renesas product portfolios. It serves as a specialized solution for video signal processing, specifically focusing on the separation of synchronization pulses from composite video signals. This function is essential for maintaining proper display timing in analog video systems.

Video Processing FAQ

How is the internal timing adjusted for different video standards?

All internal timing parameters are set using a single external resistor connected to the device.

What is the operating voltage requirement for the EL1881CS?

The device requires a single +5V power supply.

Does the device support non-standard video inputs?

Yes, the EL1881CS is designed to extract sync timing information from both standard (NTSC, PAL, SECAM) and non-standard video inputs.