• ’HC540, CD74HCT540: inverting
• ’HC541, ’HCT541: non-inverting
• Buffered inputs
• Three-state outputs
• Bus line driving capability
• Typical propagation delay = 9 ns at V_CC = 5 V,
  C_L = 15 pF, T_A = 25℃
• Fanout (over temperature range)
  • Standard outputs: 10 LSTTL loads
  • Bus driver outputs: 15 LSTTL loads
• Wide operating temperature range: –55℃ to 125℃
• Balanced propagation delay and transition times
• Significant power reduction compared to LSTTL Logic ICs
• HC types
  • 2 V to 6 V operation
  • High noise immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5 V
• HCT types
  • 4.5 V to 5.5 V operation
  • Direct LSTTL input logic compatibility,
    V_IL = 0.8 V (max), V_IH = 2 V (min)
  • CMOS input compatibility, I_I ≤ 1 μA at V_OL, V_OH

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 Noninverting 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.