CD54HCT244数据手册TI中文资料规格书

描述 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.

特性 Features

• HC/ HCT240 Inverting
• HC/ HCT241 Non-Inverting
• HC/ HCT244 Non-Inverting
• Typical Propagation Delay = 8ns at VCC = 5V, CL = 15pF, TA = 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: 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

Data sheet acquired from Harris Semiconductor