具有三态输出的7位总线接口 7-BIT BUS INTERFACES WITH 3-STATE OUTPUTS
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.
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
SN74ACT1284DWR TI 德州仪器 | 当前型号 | 当前型号 |
SN74ACT1284DW 德州仪器 | 完全替代 | SN74ACT1284DWR和SN74ACT1284DW的区别 |
SN74ACT1284DBR 德州仪器 | 完全替代 | SN74ACT1284DWR和SN74ACT1284DBR的区别 |