X28VC256F-55 Datasheet and X28VC256F-55 manual

Manufacturer : Xicor 

Packing : CFP28 

Pins : 28 

Temperature : Min 0 °C | Max 70 °C

Size : 119 KB

Application : "256K (32K x 8bit) 5 volt, byte alterable E2PROM" 

X28VC256F-55 PDF Download