TW2871-BB1-CR

Overview

The TW2871-BB1-CR is a fisheye distortion correction LSI featuring a built-in Image Signal Processor, motion detector, and DDR2 controller. It supports one HD (1080i) digital output and four SD analog outputs. The device enables pan, tilt, and zoom without mechanical parts. Key specifications include a 4-bit address and 8-bit parallel data interface with 16-byte slave registers. The ISP handles Bayer format and external inputs, offering black level, gamma, lens shading correction, noise reduction, edge enhancement, and wide dynamic range. The geometric engine provides up to four distortion-corrected windows plus one fisheye window. A DSP with Harvard architecture includes a 24-bit multiplier and 56-bit ALU. Motion detection supports large input sizes up to 8M pixels with maskable mesh elements. The DDR2 interface is compatible with JEDEC JESD79-2C, supporting speeds from 250 to 667MHz at DDR.

Feature Summary

• Integrated fisheye distortion correction with digital pan, tilt, and zoom capabilities without mechanical moving parts
• Built-in image signal processor providing comprehensive corrections including black level, gamma, lens shading, noise reduction, and wide dynamic range
• Advanced motion detection system supporting high-resolution inputs up to 8M pixels with configurable maskable mesh elements
• Embedded DDR2 controller compliant with JEDEC specifications for high-speed data throughput and internal buffering

Applications

• Security surveillance cameras
• Drive monitors
• Drive recorders

Procurement Notes

Verify the current status of this component before procurement planning. The datasheet explicitly states that the TW2871 is not recommended for new designs. Confirm availability through authorized channels or technical support centers as standard supply may be limited. Ensure compatibility with existing system architectures given its legacy status.

Selection Notes

Select this component for applications requiring integrated fisheye correction and multi-format video output in a single chip. It is suitable for systems needing digital pan, tilt, and zoom functionality without mechanical actuators. Consider its integration of ISP, motion detection, and DDR2 control for simplified board design. Evaluate suitability against newer alternatives due to its discontinued status for new designs.

Part Context

The TW2871 was originally manufactured by Intersil Americas LLC. Renesas Electronics Corporation acquired Intersil, making this part part of their broader portfolio history. The datasheet identifies it as a highly integrated solution for video processing and distortion correction. It combines multiple functions typically found in separate chips into a single LSI package.

Replacement Considerations

The datasheet explicitly marks the TW2871 as 'NOT RECOMMENDED FOR NEW DESIGNS'. No official substitute part numbers are provided in the source material. Users should consult Intersil/Renesas Technical Support for guidance on modern replacements or alternative solutions.