The different suffixes indicate different I2C slave addresses.
| PART | I2C SLAVE ADDRESS |
| MAX1239EEE | 0110101 |
| MAX1239KEEE | 0110001 |
| MAX1239LEEE | 0110011 |
| MAX1239MEEE | 0110111 |
| PART | I2C SLAVE ADDRESS |
| MAX1239EEE | 0110101 |
| MAX1239KEEE | 0110001 |
| MAX1239LEEE | 0110011 |
| MAX1239MEEE | 0110111 |