四D型触发器与Clear Quad D-Type Flip-Flop With Clear
General Description
The MM74HC175 high speed D-type flip-flop with comple mentary outputs utilizes advanced silicon-gate CMOS technology to achieve the high noise immunity and low power consumption of standard CMOS integrated circuits, along with the ability to drive 10 LS-TTL loads.
Information at the D inputs of the MM74HC175 is transferred to the Q and Q outputs on the positive going edge of the clock pulse. Both true and complement outputs from each flip flop are externally available. All four flip-flops are controlled by a common clock and a common CLEAR. Clearing is accomplished by a negative pulse at the CLEAR input. All four Q outputs are cleared to a logical “0” and all four Q outputs to a logical “1.”
The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground.
Features
■ Typical propagation delay: 15 ns
■ Wide operating supply voltage range: 2–6V
■ Low input current: 1 µA maximum
■ Low quiescent supply current: 80 µA maximum 74HC
■ High output drive current: 4 mA minimum 74HC