GS4882-CTAE3

Video Processing Overview

The GS4882-CTAE3 is a precision video sync separator designed for extracting timing information from NTSC, PAL, and SECAM composite video signals. It operates with a supply voltage range of +4.5V to +13.2V and typically consumes less than 6mA at +5V. The device features an internal color burst filter that attenuates the signal by >15dB at 3.58MHz. Key outputs include composite sync, vertical sync, back porch, and odd/even field signals. The input stage accepts signal amplitudes from 0.5V to 4.0V peak-to-peak.

Video Processing Feature Summary

• Precision 50% sync slicing minimizes time base errors caused by variations in sync pulse amplitude.
• Internal color burst filter reduces spurious timing information and external component requirements.
• Robust signal detection circuitry automatically mutes outputs to logic high when valid video is absent.
• Dual mode input clamp maintains accuracy of the internally derived 50% sync slicing level.

Video Processing Applications

• Extracting timing information from NTSC, PAL, and SECAM video signals
• Generating noise immune composite sync, vertical sync, and back porch signals
• Determining odd and even field information for interlaced video schemes

Video Processing Procurement Notes

Verify the specific suffix 'CTAE3' against current manufacturer documentation to confirm package type and environmental compliance status. Confirm availability as this part may be subject to lifecycle changes or obsolescence notices. Ensure the ordering suffix matches the required tape and reel packaging configuration for automated assembly processes.

Video Processing Selection Notes

Select the GS4882 variant when horizontal sync extraction is not required, as it provides composite sync instead. Consider the GS4982 if horizontal sync output is necessary for the application. Verify that the input signal amplitude falls within the 0.5V to 4.0Vp-p range for proper operation. Ensure the operating temperature range aligns with the commercial specification limits.

Video Processing Part Context

The GS4882 series belongs to Gennum's line of precision sync separators. These devices are engineered to provide superior noise immunity and temperature stability compared to standard separation circuits. The family includes variants like the GS4982 which offers horizontal sync output capabilities alongside the core synchronization functions provided by the GS4882.

Video Processing Replacement Considerations

The GS4881 is a related model but requires a different RSET resistor value (680kΩ) compared to the GS4882 (227kΩ). Direct substitution requires verifying timing performance and adjusting the external reference resistor accordingly.

Video Processing FAQ

How does the device handle impulse noise?

A missing pulse detector enables the device to quickly respond to impulse noise by temporarily turning on a Nosync Recovery Current connected to the dual mode input clamp.

What is the function of the RSET pin?

An external resistor connected to Pin 6 sets all timing currents in the device. For standard NTSC applications, this should be set to 227kΩ.

How is the odd/even field determined?

The device determines odd/even field information by comparing vertical sync with an internally generated horizontal sync signal.