SN54ACT240 - Octal Buffers/Drivers With 3-State Outputs

These octal buffers and line drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.

The ’ACT240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE)\ inputs. When (OE)\ is low, the device passes inverted data from the A inputs to the Y outputs. When (OE)\ is high, the outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, (OE)\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• 4.5-V to 5.5-V V_CC Operation
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 8.5 ns at 5 V
• Inputs Are TTL Compatible