EPROM Cross Reference Guide
                                                 Competitor                                                                          Winbond

Density     Org.                                                                                   Package
                    Company           Part No.                Voltage   Speed (ns)   Description                Part No.*                                 Note
 (bits)    (bits)                                                                                   Type
                                                                                                                              100% drop-in replacement; Program/Erase requires external
512K      64K*8                   AT27C512R-70-PC             12V/ 5V      70           OTP         PDIP      W27E512-70      programmer support
                     Atmel
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  AT27C512R-70-JC             12V/5V       70           OTP         PLCC      W27E512P-70     programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  M27C512-70-BST              12V/5V       70           OTP         PDIP      W27E512-70      programmer support
                    ST Micro
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  M27C512-70-CST              12V/5V       70           OTP         PLCC      W27E512P-70     programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                SST27SF512-70-3C-PG           12V/5V       70           MTP         PDIP      W27E512-70      programmer support
                      SST
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                SST27SF512-70-4C-NH           12V/5V       70           MTP         PLCC      W27E512P-70     programmer support
                                                                                                   Ceramic                    100% drop-in replacement; Program/Erase requires external
 1M       128K*8                 AT27C010L-70/90-DC           12V/5V     70, 90      UV EPROM                 W27E010-70
                                                                                                     DIP                      programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                     Atmel       AT27C010L-70/90-PC           12V/5V     70, 90         OTP         PDIP      W27E010-70      programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                 AT27C010L-70/90-JC           12V/5V     70, 90         OTP         PLCC      W27E010P-70     programmer support
                                                                                                   Ceramic                    100% Read compatible; Programming requires external
                                  M27C1001-70 F1              12V/5V       70        UV EPROM                 W27E010-70
                                                                                                     DIP                      programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                    ST Micro      M27C1001-70 B1              12V/5V       70           OTP         PDIP      W27E010-70      programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  M27C1001-70 C1              12V/5V       70           OTP         PLCC      W27E010P-70     programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                               SST27SF010-70/90-3C-PH         12V/5V     70, 90         MTP         PDIP      W27E010-70      programmer support
                      SST
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                               SST27SF010-70/90-3C-NH         12V/5V     70, 90         MTP         PLCC      W27E010P-70     programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
 2M       256K*8                  AT27C020-90-PC              12V/5V       90           OTP         PDIP     W27E020-70/90    programmer support
                     Atmel
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  AT27C020-90-JC              12V/5V       90           OTP         PLCC     W27E020P-70/90   programmer support
                                                                                                   Ceramic                    100% drop-in replacement; Program/Erase requires external
                                  M27C2001-90 F1              12V/5V       90        UV EPROM                W27E020-70/90
                                                                                                     DIP                      programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                    ST Micro      M27C2001-90 B1              12V/5V       90           OTP         PDIP     W27E020-70/90    programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                  M27C2001-90 C1              12V/5V       90           OTP         PLCC     W27E020P-70/90   programmer support
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                SST27SF020-90-3C-PH           12V/5V       90           MTP         PDIP     W27E020-70/90    programmer support
                      SST
                                                                                                                              100% drop-in replacement; Program/Erase requires external
                                SST27SF020-90-3C-NH           12V/5V       90           MTP         PLCC     W27E020P-70/90   programmer support




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EPROM Cross Reference Guide Competitor Winbond Density Org. Package Company Part No. Voltage Speed (ns) Description Part No.* Note (bits) (bits) Type 100% drop-in replacement; Program/Erase requires external 4M 512K*8 AT27C040-70/90/12-PC 12V/5V 70, 90, 120 OTP PDIP W27E040-12 programmer support Atmel 100% drop-in replacement; Program/Erase requires external AT27C040-70/90/12-JC 12V/5V 70, 90, 120 OTP PLCC W27E040P-12 programmer support Ceramic 100% drop-in replacement; Program/Erase requires external M27C4001-70/80/90/10/12/15 F1 12V/5V 70, 80, 90, 120, 150 UV EPROM W27E040-12 DIP programmer support 100% drop-in replacement; Program/Erase requires external ST Micro M27C4001-70/80/90/10/12/15 B1 12V/5V 70, 80, 90, 120, 150 OTP PDIP W27E040-12 programmer support 100% drop-in replacement; Program/Erase requires external M27C4001-70/80/90/10/12/15 C1 12V/5V 70, 80, 90, 120, 150 OTP PLCC W27E040P-12 programmer support Note: This competitive data was obtained from public sources. There could be minor differences on AC/DC electrical spec and features. Winbond is not responsible for any changes or errors in this information. *All Winbond EPROM are electrically erasable and are in plastic packaging. Winbond Electronics Corporation America Winbond Electronics Corp. Winbond Electronics Corporation America Winbond Electronics Corporation America Winbond Electronics Corporation America Winbond Electronics Corporation America WECA Headquarters Corporate Headquarters WECA Europe Office Southeast Area Sales Office Northwest Area Sales Office Northeast Area Sales Office Southwest Area Sales Office No. 4, Creation Rd. 3, Mundsburg Tower, 17th Floor 5318 Hwy. 290 West, Suite 400 7767 Elm Creek Blvd, Suite 300 1740 Massachusetts Avenue 2727 North First Street Science-Based Industrial Park Hamburger Strasse 11 Austin, TX 78735 Maple Grove, MN 55369 Boxborough, MA 01719 San Jose, CA 95134 Hsinchu, Taiwan D-22083 Hamburg U.S.A. U.S.A. U.S.A. U.S.A. Tel: +886-3-5770066 Germany Tel: 830-899-5710 Tel: 763-416-9042 Tel 978-264-2088 Tel: 408-943-6666 Fax: +886-3-5792668 Tel: +49 49 300367-0 Fax: 830-899-5716 Fax: 763-416-9078 Fax: 978-264-3277 Fax: 408-544-1787 http://www.winbond.com.tw Fax: +49-40-300367-10 http://www.winbond-usa.com Page 2