74ACT138 Overview
The 74ACT1284 contains four non-inverting bidirectional buffers and three non-inverting buffers with open Drain outputs and high drive capability on the B Ports. It is intended to provide a standard signaling method for a bi-direction parallel peripheral in an Extended Capabilities Port mode (ECP). The HD (active HIGH) input pin enables the B Ports to switch from open Drain to a high drive totem pole output, capable...
74ACT138 Key Features
- B7 Description High Drive Enable input (Active HIGH) Direction Control Input Side A Inputs or Outputs Side B Inputs or O
- B7 Open Drain Outputs Note 2: B1
- B7 Open Drain Outputs
- A4, and A5
- A7 Data to B5
- B7 (Note 1) B1- B4 Data to A1
- A4, and A5
- A7 Data to B5
- A7 Data to B1
- B7 (Note 2) A1
