| 型号 | 制造商 | 描述 | 操作 |
| SN74LS640ND [更多] | Rochester Electronics LLC | 搜索 | |
| SN74LS640NDS [更多] | Rochester Electronics LLC | 搜索 |
| 型号 | 制造商 | 描述 | 操作 |
| SN74LS640ND [更多] | Motorola Semiconductor Products | LS SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20 | 搜索 |
| SN74LS640ND [更多] | Motorola Semiconductor Products | LS SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20 | 搜索 |