This part is a kind of semiconductor called MSP4450G.
Function of this product has Multistandard Sound Processor.
Manufacturers : Micronas Semiconductor
Image and pinout :

Some of the text within the PDF file :
PRELIMINARY DATA SHEET MICRONAS MSP 44x0G Multistandard Sound Processor Family Edition May 16, 2001 6251-533-1PD MICRONAS MSP 44x0G Contents Page 6 7 8 8 10 11 11 11 11 12 12 12 12 14 14 14 14 14 14 14 15 15 15 15 15 15 16 16 16 16 16 16 17 17 17 18 18 18 19 19 20 20 20 20 20 Section 1. 1.1. 1.2. 1.3. 2. 2.1. 2.2. 2.2.1. 2.2.2. 2.2.3. 2.2.4. 2.2.5. 2.3. 2.4. 2.5. 2.5.1. 2.5.2. 2.5.3. 2.5.4. 2.5.5. 2.5.5.1. 2.5.5.2. 2.5.5.3. 2.6. 2.6.1. 2.6.2. 2.7. 2.7.1. 2.7.2. 2.7.2.1. 2.7.2.2. 2.7.3. 2.8. 2.9. 2.10. 3. 3.1. 3.1.1. 3.1.2. 3.1.3. 3.1.4. 3.1.4.1. 3.1.4.2. 3.1.4.3. 3.1.4.4. Title PRELIMINARY DATA SHEET Introduction Features of the MSP 44x0G Family and Differences to MSPD MSP 44x0G Version List MSP 44x0G Versions and their Application Fields Fun [ ... ]
MSP4450G PDF Datasheet Download
