CD74HC109数据手册集成电路（IC）的触发器规格书PDF

描述 Description

The ’HC109 and ’HCT109 are dual J-K\\ flip-flops with set and reset. The flip-flop changes state with the positive transition of Clock (1CP and 2CP).

The flip-flop is set and reset by active-low S\\ and R\\, respectively. A low on both the set and reset inputs simultaneously will force both Q and Q\\ outputs high. However, both set and reset going high simultaneously results in an unpredictable output condition.

特性 Features

• Asynchronous Set and Reset
• Schmitt Trigger Clock Inputs
• Typical fMAX = 54MHz at VCC = 5V, CL = 15pF, A = 25°C
• 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