SN54HCT540 - Octal Buffers And Line Drivers With 3-State Outputs

These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (OE1\ or OE2\) input is high, all eight outputs are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.

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.

Products containing the "SN54HCT540" keyword are: SN54HCT540J

• Operating Voltage Range of 4.5 V to 5.5 V
• Low Power Consumption, 80-µA Max I_CC
• Typical t_pd = 12 ns
• ±6-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Inputs Are TTL-Voltage Compatible
• High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads
• Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)