The MC74AC540/74ACT540 and MC74AC541/74ACT541 are octal buffer/linedrivers designed to be employed as memory and address drivers, clock drivers andbus oriented transmitter/receivers. The MC74AC541/74ACT541 is a noninvertingoption of the MC74AC540/74ACT540. These devices are similar in function to the MC74AC240/74ACT240 andMC74AC244/74ACT244 while providing flow-through architecture (inputs on oppositeside from outputs). This pinout arrangement makes these devices especially usefulas output ports for microprocessors, allowing ease of layout and greater PC board density.
Inputs and Outputs Opposite Side of Package, Allowing Easier Interface to Microprocessors