Description
●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.
●Features
●• HC/HCT240 Inverting
●• HC/HCT241 Non-Inverting
●• HC/HCT244 Non-Inverting
●• Typical Propagation Delay = 8ns at VCC = 5V, CL = 15pF, TA = 25oC 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 . . . -55oC to 125oC
●• Balanced Propagation Delay and Transition Times
●• Significant Power Reduction Compared to LSTTL Logic ICs
●• HC Types
● - 2V to 6V Operation
● - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
●• HCT Types
● - 4.5V to 5.5V Operation
● - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)
● - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
