BU1425AKV

Overview

The BU1425AKV is a digital RGB/YUV to NTSC/PAL encoder manufactured by ROHM Semiconductor. It converts 24-bit RGB or 16-bit YUV input data into composite (VOUT), luminance (YOUT), and chrominance (COUT) analog signals. The device supports multiple clock frequencies including 27.0 MHz, 13.5 MHz, 28.636 MHz, 14.318 MHz, 28.375 MHz, 14.1875 MHz, 35.4695 MHz, and 17.73475 MHz. It features a 9-bit DAC for video output, an internal 8-color OSD generator, and operates on a single 5V supply with typical power consumption of 0.4W. The IC accommodates both master and slave synchronization modes.

Feature Summary

• Supports 24-bit RGB and 16-bit YUV digital input formats
• Includes internal 8-color OSD generation capability
• Features selectable Y-channel FSC-TRAP and C-channel band-pass filters
• Enables low power consumption mode by disabling Y and C outputs

Applications

• Video interfaces for VIDEO-CD decoders
• Video interfaces for CD-G decoders

Procurement Notes

Verify the specific suffix 'V' against the manufacturer's official documentation to confirm pinout compatibility and electrical characteristics relative to the standard BU1425AK. Ensure that the I/O voltage requirements match the target system design, particularly regarding the 3.3V interface option in Master mode.

Selection Notes

Select this component when a dedicated NTSC/PAL encoder is required for multimedia applications. Consider the supported input clock frequencies and the need for internal OSD generation. Evaluate the power consumption constraints, specifically the reduced current draw when using the YCOFF function for systems requiring minimal energy usage during specific operational states.

Part Context

The BU1425AKV belongs to the BU1425AK series of multimedia ICs designed for color signal encoding. This family of components focuses on converting digital video data into standard analog television signals. The series is engineered for integration into consumer electronics and multimedia playback devices requiring reliable video signal generation.

Replacement Considerations

BU1425AK is the primary variant within the same series. Verify functional equivalence and pin compatibility before substitution.

FAQ

What are the supported input clock frequencies?

The device supports 27.0/13.5MHz, 28.636/14.318MHz, 28.375/14.1875MHz, and 35.4695/17.73475MHz.

How is the low power consumption mode activated?

Setting the YCOFF pin to HIGH turns off the YOUT and COUT pins, reducing typical power consumption to 0.25W.

Can the device operate with a 3.3V logic interface?

Yes, in Master mode, applying 3.3V to IOVDD allows HSY and VSY outputs with a 3.3V amplitude.