This part is a kind of semiconductor called 93CS46.

Function of this product has 1K 64 x 16 SERIAL MICROWIRE EEPROM.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

ST93CS46 ST93CS47 1K (64 x 16) SERIAL MICROWIRE EEPROM NOT FOR NEW DESIGN 1 MILLION ERASE/WRITE CYCLES, with 40 YEARS DATA RETENTION SELF-TIMED PROGRAMMING CYCLE with AUTO-ERASE READY/BUSY SIGNAL DURING PROGRAMMING SINGLE SUPPLY VOLTAGE – 3V to 5.5V for the ST93CS46 – 2.5V to 5.5V for the ST93CS47 USER DEFINED WRITE PROTECTED AREA PAGE WRITE MODE (4 WORDS) SEQUENTIAL READ OPERATION 5ms TYPICAL PROGRAMMING TIME ST93CS46 and ST93CS47 are replaced by the M93S46 8 1 PSDIP8 (B) 0.4mm Frame 8 1 SO8 (M) 150mil Width Figure 1. Logic Diagram DESCRIPTION The ST93CS46 and ST93CS47 are 1K bit Electrically Erasable Programmable Memory (EEPROM) fabricated with SGS-THOMSON’s High Endurance Single Polysilicon CMOS technology. The memory is accessed through a serial input D an [ ... ]

93CS46 PDF Datasheet Download