| PIN | | |
| MAX4731 | MAX4732 | MAX4733 | NAME | FUNCTION |
| UCSP | ¨MAX | UCSP | pMAX | UCSP | pMAX |
| A1 | 1 | | | A1 | 1 | N01 | Analog-Switch Normally Open Terminal |
| A2 | 2 | A2 | 2 | A2 | 2 | COM1 | Analog-Switch Common Terminal |
| A3 | 4 | A3 | 4 | A3 | 4 | GND | Ground. Connect to digital ground. |
| 81 | 7 | 81 | 7 | B1 | 7 | IN1 | Logic-Control Digital Input |
| 83 | 3 | 83 | 3 | B3 | 3 | IN2 | Logic-Control Digital Input |
| C1 | 8 | C1 | 8 | C1 | 8 | V+ | Positive Supply Voltage Input |
| C2 | 6 | C2 | 6 | C2 | 6 | COM2 | Analog-Switch Common Terminal |
| C3 | 5 | | | | | N02 | Analog-Switch Normally Open Terminal |
| | | A1 | 1 | | | NC1 | Analog-Switch Normally Closed Terminal |
| | | C3 | 5 | C3 | 5 | NC2 | Analog-Switch Normally Closed Terminal |
| | | | | | | |
