Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin SOIC T/R

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.

HC/ HCT240 Inverting

HC/ HCT241 Non-Inverting

HC/ HCT244 Non-Inverting

Typical Propagation Delay = 8ns at V_CC = 5V, C_L = 15pF, T_A = 25°C 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°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