| 278521 | AT27C020-15PC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278522 | AT27C020-15PI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278523 | AT27C020-15TC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278524 | AT27C020-15TI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278525 | AT27C020-55JC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278526 | AT27C020-55JI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278527 | AT27C020-55PC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278528 | AT27C020-55PI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278529 | AT27C020-55TC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278530 | AT27C020-55TI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278531 | AT27C020-70JC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278532 | AT27C020-70JI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278533 | AT27C020-70PC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278534 | AT27C020-70PI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278535 | AT27C020-70TC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278536 | AT27C020-70TI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278537 | AT27C020-90JC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278538 | AT27C020-90JI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278539 | AT27C020-90PC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
|
| 278540 | AT27C020-90PI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278541 | AT27C020-90TC | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278542 | AT27C020-90TI | 2-Megabit 256K x 8 OTP EPROM | Atmel |
| 278543 | AT27C040 | 4M bit EPROM | Atmel |
| 278544 | AT27C040-12 | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278545 | AT27C040-12JC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278546 | AT27C040-12JI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278547 | AT27C040-12PC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278548 | AT27C040-12PI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278549 | AT27C040-12RC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278550 | AT27C040-12RI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278551 | AT27C040-12TC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278552 | AT27C040-12TI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278553 | AT27C040-15JC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278554 | AT27C040-15JI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278555 | AT27C040-15PC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278556 | AT27C040-15PI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278557 | AT27C040-15RC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278558 | AT27C040-15RI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278559 | AT27C040-15TC | 4-Megabit 512K x 8 OTP EPROM | Atmel |
| 278560 | AT27C040-15TI | 4-Megabit 512K x 8 OTP EPROM | Atmel |
