The ’ACT1284 devices are designed for asynchronous two-way communication between data buses. The control function minimizes external timing requirements.
The devices allow data transmission in either the A-to-B or the B-to-A direction for bits 1, 2, 3, and 4, depending on the logic level at the direction-control (DIR) input. Bits 5, 6, and 7, however, always transmit in the A-to-B direction.
The output drive for each mode is determined by the high-drive (HD) control pin. When HD is high, the high drive is delivered by the totem-pole configuration, and when HD is low, the outputs are open drain. This meets the drive requirements as specified in the IEEE 1284-I (level-1 type) and the IEEE 1284-II (level-2 type) parallel peripheral-interface specification
| 器件 | 状态 | 温度 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| SN74ACT1284DW | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74ACT1284DWE4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74ACT1284DWG4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 25 | TUBE |
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| SN74ACT1284DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ACT1284DW | SN74ACT1284DW |
| SN74ACT1284DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ACT1284DWE4 | SN74ACT1284DWE4 |
| SN74ACT1284DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ACT1284DWG4 | SN74ACT1284DWG4 |