This part is a kind of semiconductor called CXD2587Q.

Function of this product has CD Digital Signal Processor with Built-in Digital Servo and DAC.

Manufacturers : Sony Corporation

Image and pinout :

Some of the text within the PDF file :

CXD2587Q CD Digital Signal Processor with Built-in Digital Servo and DAC For the availability of this product, please contact the sales office. Description The CXD2587Q is a digital signal processor LSI for CD players. This LSI incorporates a digital servo, digital filter, zero detection circuit, 1-bit DAC and analog low-pass filter. Features Digital Signal Processor (DSP) Block • 1×, 2×, 4× speed playback supported • 16K-RAM • EFM data demodulation • Enhanced EFM frame sync signal protection • SEC strategy-based error correction • Subcode demodulation and Sub Q data error detection • Digital spindle servo • 16-bit traverse counter • Asymmetry compensation circuit • CPU interface on serial bus • Error correction monitor signal, etc. output from a new CPU interface [ ... ]

CXD2587Q PDF Datasheet Download