This part is a kind of semiconductor called SAB80C537-N.

Function of this product has 8-Bit CMOS Single-Chip Microcontroller.

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

Microcomputer Components 8-Bit CMOS Single-Chip Microcontroller SAB 80C517/80C537 Data Sheet 04.95 High-Performance 8-Bit CMOS Single-Chip Microcontroller Advanced Information SAB 80C517 SAB 80C537 q q q q SAB 80C517/80C537 Microcontroller with factory mask-programmable ROM Microcontroller for external ROM q q q q Versions for 12 MHz and 16 MHz operating frequency 8 K × 8 ROM (SAB 80C517 only) 256 × 8 on-chip RAM Superset of SAB 80C51 architecture: 1 µs instruction cycle time at 12 MHz 750 ns instruction cycle time at 16 MHz 256 directly addressable bits Boolean processor 64 Kbyte external data and program memory addressing Four 16-bit timer/counters Powerful 16-bit compare/capture unit (CCU) with up to 21 high-speed or PWM output channels and 5 capture inputs Versatile "fail-sa [ ... ]

SAB80C537-N PDF Datasheet Download