This part is a kind of semiconductor called CAT59C11HK.

Function of this product has 1K-Bit Serial EEPROM.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

CAT59C11HK ********** C-MOS 1K-BIT(64x16 /128x8 BIT)SERIAL EEPROM -TOP VIEW- IL08 CS IN CK IN DI IN 1 2 3 V DD(+5V) 8 7 6 GND 5 RY/BY ORG IN 3 DI 2 CK CS 1 DO RY/BY ORG 6 4 7 DO OUT 4 CK ;CLOCK INPUT ;CHIP SELECT INPUT CS DI ;SERIAL DATA INPUT DO ;SERIAL DATA OUTPUT ORG ;MEMORY ORGANIZATION(64x16 /128x8 BIT) RY/BY;STATUS OUTPUT(READY/ BUSY ) 6 ORG MEMORY ARRAY 64x16 OR 128x8 BITS ADDRESS DECODER 3 DI MODE DECODE LOGIC OUTPUT BUFFER 4 DO 1 CS 7 RY/BY 2 CK CLOCK GENERATOR w w w .d e e h s a t a . u t4 m o c DATA REGISTER [ ... ]

CAT59C11HK PDF Datasheet Download