| Description | Package | Voltage | Speed | Temperature |
|---|---|---|---|---|
| AT27C020-55JU / 90JU | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JC/JI | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JI | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JI PLCC32 | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JU | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JU:ATML | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |
| AT27C020-90JUPLCC32 | PLCC-32 | 5.0 V | 90 NS | -40 C~+85 C |