| 278721 | AT27C256R-55JC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278722 | AT27C256R-55JI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278723 | AT27C256R-55PC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278724 | AT27C256R-55PI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278725 | AT27C256R-55RC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278726 | AT27C256R-55RI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278727 | AT27C256R-55TC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278728 | AT27C256R-55TI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278729 | AT27C256R-70 | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278730 | AT27C256R-70JC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278731 | AT27C256R-70JI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278732 | AT27C256R-70PC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278733 | AT27C256R-70PI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278734 | AT27C256R-70RC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278735 | AT27C256R-70RI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278736 | AT27C256R-70TC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278737 | AT27C256R-70TI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278738 | AT27C256R-90 | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278739 | AT27C256R-90JC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
|
| 278740 | AT27C256R-90JI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278741 | AT27C256R-90PC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278742 | AT27C256R-90PI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278743 | AT27C256R-90RC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278744 | AT27C256R-90RI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278745 | AT27C256R-90TC | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278746 | AT27C256R-90TI | 256K 32K x 8 OTP CMOS EPROM | Atmel |
| 278747 | AT27C400 | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278748 | AT27C400-12 | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278749 | AT27C400-12PC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278750 | AT27C400-12PI | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278751 | AT27C400-12RC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278752 | AT27C400-12RI | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278753 | AT27C400-12TC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278754 | AT27C400-12TI | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278755 | AT27C400-15 | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278756 | AT27C400-15PC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278757 | AT27C400-15PI | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278758 | AT27C400-15RC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278759 | AT27C400-15RI | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
| 278760 | AT27C400-15TC | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM | Atmel |
