This part is a kind of semiconductor called 20CZ16.

Function of this product has High Speed NOVRAM.

Manufacturers : Xicor

Image and pinout :

Some of the text within the PDF file :

APPLICATION NOTE A V A I LABLE AN56 High Speed NOVRAM FEATURES • Fast access time: 35ns • High reliability Endurance: 105 nonvolatile store operations Retention: 10 years minimum • Power-on recall EEPROM data automatically recalled into RAM upon power-up • Low power CMOS Standby: 1mA • Infinite EEPROM array recall, and RAM read and write cycles • Hardware store initiation (store cycle time < 10ms) • Available in the 32-lead plastic leadless chip carrier package DESCRIPTION X20CZ16 The Xicor X20CZ16 is a 2K x 8 NOVRAM featuring a high-speed static RAM overlaid bit-for-bit with a nonvolatile electrically erasable PROM (EEPROM). The X20CZ16 is fabricated with advanced CMOS floating gate technology to achieve high speed with low power and wide [ ... ]

20CZ16 PDF Datasheet Download