This part is a kind of semiconductor called 9639.

Function of this product has N-CHANNEL 150V - 0.045 OHM - 5A SO-8 LOW GATE CHARGE STripFET POWER MOSFET.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

ST95P04 SERIAL ACCESS SPI BUS 4K (512 x 8) EEPROM NOT FOR NEW DESIGN 1 MILLION ERASE/WRITE CYCLES 40 YEARS DATA RETENTION SINGLE 3V to 5.5V SUPPLY VOLTAGE SPI BUS COMPATIBLE SERIAL INTERFACE 1 MHz CLOCK RATE MAX BLOCK WRITE PROTECTION STATUS REGISTER 16 BYTE PAGE MODE WRITE PROTECT SELF-TIMED PROGRAMMING CYCLE E.S.D.PROTECTION GREATER than 4000V The ST95P04 will be replaced shortly by the updated version ST95040 8 1 PSDIP8 (B) 0.25mm Frame 8 1 SO8 (M) Figure 1. Logic Diagram DESCRIPTION The ST95P04 is a 4K bit Electrically Erasable Programmable Memory (EEPROM) fabricated with SGS-THOMSON’s High Endurance Single Polysilicon CMOS technology. The 4K bit memory is organised as 32 pages of 16 bytes. The memory is accessed by a simple SPI bus compatible serial interface. The bus signals ar [ ... ]

9639 PDF Datasheet Download