1 Features

’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