54HCT244 - Texas Instruments

54HCT244 High-Speed CMOS Logic Octal Buffer/Line Drivers

The ’HC240 and ’HCT240 are inverting three-state buffers having two active-low output enables. The CD74HC241, ’HCT241, ’HC244 and ’HCT244 are non-inverting three-state buffers that differ only in that the 241 has one active-high and one active-low output enable, and the 244 has two active-low output enables. All three types have identical pinouts. PART NUM.

Features

• HC/HCT240 Inverting
• HC/HCT241 Non-inverting
• HC/HCT244 Non-inverting
• Typical propagation delay = 8ns at VCC = 5 V, CL = 15 pF, TA = 25℃ for HC240
• Three-state outputs
• Buffered inputs
• High-current bus driver outputs
• 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: NIL = 30%, NIH = 30% of VCC at VCC = 5 V
• HCT types.