SN74ACT1284 - 具有三态输出的 7 位总线接口

SN74ACT1284是TI德州仪器公司的一款IEEE-1284并行端接口(PPI)产品，SN74ACT1284是具有三态输出的 7 位总线接口，本站介绍了SN74ACT1284的封装应用图解、特点和优点、功能等，并给出了与SN74ACT1284相关的TI元器件型号供参考。

SN74ACT1284 - 具有三态输出的 7 位总线接口 - IEEE-1284并行端接口(PPI) - 特殊逻辑 - 德州仪器

产品描述

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.

产品特性

4.5-V to 5.5-V VCC Operation
Inputs Accept Voltages to 5.5 V
Max tpd of 20 ns at 5 V
3-State Outputs Directly Drive Bus Lines
Flow-Through Architecture Optimizes PCB Layout
Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
Designed for the IEEE 1284-I (Level-1 Type) and IEEE 1284-II (Level-2 Type) Electrical Specifications

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