| Device Name | Max. Operating Freq. (MHz) | F.max (MHz) | Max I/O Pins | Operating Voltage (Vcc) | Speed | Registers | Usable Gates | Memory | Packages |
| AT40K05 | 100 | 100 | 128 | -2 | 256 | 5K - 10K | 2048 | LQFP 144AA 144 | |
| AT40K05AL | 100 | 100 | 128 | 3.3 | -1 | 496 | 5K - 10K | 2048 | |
| AT40K10 | 100 | 100 | 192 | -2 | 576 | 10K - 20K | 4608 | PQFP 208Q1 208,Wafer Sales W | |
| AT40K10AL | 100 | 100 | 192 | 3.3 | -1 | 954 | 10K - 20K | 4608 | LQFP 144AA 144 |
| AT40K20 | 100 | 100 | 256 | -2 | 1024 | 20K - 30K | 8192 | LQFP 144AA 144 | |
| AT40K20AL | 100 | 100 | 256 | 3.3 | -1 | 1520 | 20K - 30K | 8192 | LQFP 144AA 144 |
| AT40K40 | 100 | 100 | 384 | -2 | 2304 | 40K - 50K | 18432 | ||
| AT40K40AL | 100 | 100 | 384 | 3.3 | -1 | 3048 | 40K - 50K | 18432 | PQFP 208Q1 208 |
