The 'LS266 is comprised of four independent 2-input exclusive-NOR gates with open-collector outputs. The open-collector outputs permit tying outputs together for multiple-bit comparisons.
| Technology family | LS |
| Number of channels | 4 |
| Inputs per channel | 2 |
| IOL (max) (mA) | 8 |
| Input type | Bipolar |
| IOH (max) (mA) | 0 |
| Output type | Open-collector |
| Features | High speed (tpd 10- 50ns) |
| Data rate (max) (Mbps) | 35 |
| Rating | Catalog |
| Operating temperature range (°C) | 0 to 70 |
| PDIP (N) | 14 | 181.42 mm² 19.3 x 9.4 |
| SOIC (D) | 14 | 51.9 mm² 8.65 x 6 |