X28HT512R-20 Datasheet and X28HT512R-20 manual

Manufacturer : Xicor 

Packing : SOIC32C 

Pins : 32 

Temperature : Min -25 °C | Max 175 °C

Size : 74 KB

Application : "512K (64K x 8bit) high temperature, 5 volt, byte alterable E2PROM" 

X28HT512R-20 PDF Download