Density Power Organization Part No Packages DatasheetRevision Availability 256K 5V 32K X 8 W27E257 DIP 28, PLCC 32 A3Jan. 1997 M/P W27C257 DIP 28, PLCC 32 A2Sep. 1998 M/P 512K 5V 64K X 8 W27E512 DIP 28, PLCC 32, SOP28, TSOP28 A9Jun. 2000 M/P W27C512* DIP 28, PLCC 32 A4Nov. 1999 M/P 5V/3.3V 64K X 8 W27E520 TSOP 20, SOP 20 A2 Sep. 2000 M/P W27L520 TSOP 20, SOP 20 A5Jul. 2001 M/P W27C520 TSOP 20, SOP 20 A1Oct. 2000 M/P 1M 5V 128K X 8 W27E010 DIP 32, PLCC 32, SOP32 A6Jun. 2000 M/P W27C010* DIP 32, PLCC 32, STSOP32 A4Jun. 2001 M/P 3.3V 128K X 8 W27L010 DIP 32, PLCC 32, STSOP32 A5Jun. 2001 M/P 2M 5V 256K X 8 W27E020 DIP 32, PLCC 32 A2Jun. 2000 M/P W27C020* DIP 32, PLCC 32 A1Sept. 1998 M/P 5V/3V** 256K X 8 W27C020M** DIP 32, PLCC 32 A2Jun. 1999 M/P 4M 5V 512K X 8 W27E040 DIP 32, PLCC 32, SOP32, TSOP32 A2Jun. 2000 M/P 256K X 16 W27C4096* DIP 40, PLCC 44, TSOP40 A1Mar. 1999 M/P *W27Cxx series lesson the Vih to 2.2V and Vcc tolerance to +/-5%**5V input and 3.3V output (mixed mode)