DESCRIPTION

The 74F640 is an octal transceiver featuring inverting 3-State bus compatible outputs in both transmit and receive directions. The B port outputs are capable of sinking 64mA and sourcing 15mA, providing very good capacitive drive characteristics. The device features an Output Enable (OE) input for easy cascading and Transmit/Receiver (T/R) input for direction control. The 3-State outputs, B0–B7, have been designed to prevent output bus loading if the power is removed from the device.

FEATURES

• High-impedance NPN base inputs for reduced loading

  (70µA in High and Low states)

• Ideal for applications which require high-output drive and minimal bus loading

• Inverting version of 74F245

• Octal bidirectional bus interface

• 3-State outputs sink 64mA and source 15mA