CD74HCT540 - High Speed CMOS Logic Octal Inverting Buffers and Line Drivers with 3-State Outputs

The ’HC540 and CD74HCT540 are Inverting Octal Buffers and Line Drivers with Three-State Outputs and the capability to drive 15 LSTTL loads. The ’HC541 and ’HCT541 are Non-Inverting Octal Buffers and Line Drivers with Three-State Outputs that can drive 15 LSTTL loads. The Output Enables (OE1\) and (OE2\) control the Three-State Outputs. If either OE1\ or OE2\ is HIGH the outputs will be in the high impedance state. For data output OE1\ and OE2\ both must be LOW.

• ’HC540, CD74HCT540 . . . . . . Inverting
• ’HC541, ’HCT541. . . . . . . . .Non-Inverting
• Buffered Inputs
• Three-State Outputs
• Bus Line Driving Capability
• Typical Propagation Delay = 9ns at V_CC = 5V, C_L = 15pF, T_A = 25°C
• Fanout (Over Temperature Range)
  • Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
  • Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . –55°C to 125°C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
  • 2V to 6V Operation
  • High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
• HCT Types
  • 4.5V to 5.5V Operation
  • Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
  • CMOS Input Compatibility, I_l ≤ 1µA at V_OL, V_OH