This part is a kind of semiconductor called M65850FP.
Function of this product has DIGITAL ECHO(DIGITAL DELAY).
Manufacturers : Mitsubishi
Image and pinout :
Some of the text within the PDF file :
P ric ; Th ice aramet t o N p e som a subje M Inot a fin I re L s R E is is limit a e ion Y icat o chang f R i c e N A l sp ct t . . MITSUBISHI SOUND PROCESSOR ICs M65850P/FP DIGITAL ECHO(DIGITAL DELAY) 50 SERIES KARAOKE DESCRIPTION ◊ The M65850P/FP is a CMOS IC for generating echo to be added to the voice through a "karaoke" microphone. ◊ It is optimal to provide the echo effect function for karaoke player, such as radio cassette recorders, mini audio components and television sets. ◊ Increased master clock frequency assures high-performance short delay,enabling the IC to be used for dolby prologic surround system. FEATURES • Built-in input/output filters, A-D and D-A converters,and memory realize a delay system with only a single chip. • Built-in current control ty [ ... ]