FFFE/互通料號 (形式，腳位和功能對等)
| IC 編號 | 脚位/封装 | 電壓(伏) | 速度 | 溫度規格 |
|---|---|---|---|---|
| AT27C512R-70/90PC/PI | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R-70/90PU | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R-90IP | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R-90PCDIP | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R-90PI | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R-90PU | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C512R90PIOTP | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| M27C512-90B6 | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |
| M27C512-90B6(ROHS) | PDIP-28 | 5.0 V | 90 NS | -40 C~+85 C |