| CPAB | 1 • | 24 | Vcc |
| SAB | 2 | 23 | CPBA |
| DIR | 3 | 22 | SBA |
| A0 | 4 | 21 | OE |
| A1 | 5 | 20 | B0 |
| A2 | 6 | 19 | B1 |
| A3 | 7 | 18 | B2 |
| A4 | 8 | 17 | B3 |
| A5 | 9 | 16 | B4 |
| A6 | 10 | 15 | B5 |
| A7 | 11 | 14 | B6 |
| GND | 12 | 13 | B7 |
| Pin | Symbol | Description |
|---|---|---|
| 1 | CPAB | A to B clock input (low-to-high, edge-triggered) |
| 2 | SAB | select A to B source input |
| 3 | DIR | direction control input |
| 4 | A0 | A data input/output |
| 5 | A1 | A data input/output |
| 6 | A2 | A data input/output |
| 7 | A3 | A data input/output |
| 8 | A4 | A data input/output |
| 9 | A5 | A data input/output |
| 10 | A6 | A data input/output |
| 11 | A7 | A data input/output |
| 12 | GND | ground |
| 13 | B7 | B data input/output |
| 14 | B6 | B data input/output |
| 15 | B5 | B data input/output |
| 16 | B4 | B data input/output |
| 17 | B3 | B data input/output |
| 18 | B2 | B data input/output |
| 19 | B1 | B data input/output |
| 20 | B0 | B data input/output |
| 21 | OE | output enable (active low) |
| 22 | SBA | select B to A source input |
| 23 | CPBA | B to A clock input (low-to-high, edge-triggered) |
| 24 | Vcc | supply voltage |
| Parameter | Value | Unit |
|---|---|---|
| Propagation delay, An, Bn to Bn, An | 11 (74HC) 13 (74HCT) | ns |
| Maximum clock frequency | 69 (74HC) 85 (74HCT) | MHz |
Note: Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.