AK8858VQ

Overview

The AK8858VQ is a single-chip digital video decoder manufactured by Asahi Kasei Microsystems. It processes composite, S-Video, and component video signals (525i/625i and 525p/625p). The device features a 10-bit 54MHz ADC with two channels and an internally generated pixel clock synchronized to the input signal. Output data is available in YCbCr 4:2:2 or RGB 8:8:8 formats via ITU-R BT.656 interfaces. Control is managed through an I2C interface. Core supply voltage ranges from 1.70V to 2.00V, while I/O supply voltage ranges from 1.70V to 3.60V. Operating temperature spans -40°C to 105°C.

Feature Summary

• Decodes NTSC, PAL, SECAM, and component video standards with adaptive 2-D Y/C separation
• Includes programmable gain amplifier, automatic gain control, and auto color control functions
• Supports closed caption, WSS, CGMS-A decoding, and Macrovision signal detection
• Provides image adjustment capabilities for contrast, brightness, saturation, hue, and sharpness

Applications

• Digital video decoders for consumer electronics
• Set-top boxes requiring multi-format video input support
• Video capture devices processing composite and component signals

Procurement Notes

Verify the manufacturer designation as Asahi Kasei Microsystems when sourcing this component. Confirm the specific suffix 'VQ' corresponds to the required package type and tape/reel configuration. Ensure compatibility with the specified core and I/O voltage levels during integration planning.

Selection Notes

Select this component for applications requiring integrated decoding of analog video standards into digital YCbCr or RGB outputs. Consider the internal PLL and pixel clock generation if external timing sources are unavailable. Verify that the operating temperature range meets the environmental requirements of the target system.

Part Context

The AK8858 series belongs to Asahi Kasei Microsystems' portfolio of digital video decoders. These components are designed to bridge analog video inputs with digital processing systems. The VQ package variant typically denotes a specific surface-mount footprint suitable for automated assembly in compact electronic devices.

Replacement Considerations

Publicly confirmed substitute part numbers for the AK8858VQ are not available in verified documentation. Evaluate alternative video decoders based on pin compatibility and supported video standards if substitution is necessary.