AK8856BVN

Overview

The AK8856BVN is a digital video decoder manufactured by Asahi Kasei Microdevices. It decodes NTSC and PAL composite video signals into digital ITU-R BT.601 compatible Y, Cb, and Cr outputs. The device integrates a 10-bit ADC operating at 24.5454 MHz or 27 MHz, an on-chip PLL for clock generation, and a quartz crystal oscillator circuit. It supports selectable picture sizes including QVGA, VGA, QCIF, CIF, and 601 formats, with rotated output modes available. The unit features auto color control, adaptive auto gain control, and closed caption decoding capabilities within a TQFP-100 package.

Feature Summary

• Integrates 10-bit analog-to-digital conversion with fixed clock sampling
• Includes on-chip phase-locked loop and quartz crystal oscillator circuits
• Supports multiple selectable output resolutions and frame rates
• Provides closed caption and VBID decoding functions

Applications

• NTSC/PAL composite video signal processing
• Digital video decoder systems requiring ITU-R BT.601 outputs
• Closed caption and VBI data extraction applications

Procurement Notes

Verify the specific suffix BVN against official manufacturer documentation to confirm pinout and electrical characteristics. Confirm current availability status as product lifecycles may change. Ensure compatibility with existing system clocks and voltage requirements before integration.

Selection Notes

Select this component when NTSC or PAL composite input decoding to digital parallel output is required. Consider the integrated ADC and clock generation features if external timing components are undesirable. Verify that the TQFP-100 package fits the target board layout constraints.

Part Context

This part belongs to the AK885x series of digital video decoders from Asahi Kasei Microdevices. These devices are designed for converting analog composite video standards into digital formats suitable for further processing in multimedia systems.

Replacement Considerations

Check the official datasheet for direct pin-compatible replacements. Evaluate alternative decoders from the same manufacturer family if the specific suffix is unavailable.