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 |
|---|---|---|---|---|
| AT27C020-70PC | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PC(00) | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PC(DIP) | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PC(OTP) | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PC12288 | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PCAT | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PCATMEL | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PCDIP | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-70PCLL | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |
| AT27C020-PC70 | PDIP-32 | 5.0 V | 70 NS | 0 C~+70 C |