74HC/HCT74是双路上升沿触发的D型触发器。它们具有单独的数据(nD)，时钟(nCP)置数(nSD)和复位(nRD)输入以及互补的nQ和nQ输出。满足从低电平到高电平时钟转换的建立和保持时间要求的nD输入处的数据存储在触发器中，并出现在nO输出中。输入内置钳位二极管。这样就可以使用限流电阻将输入接口连接到超过Vcc的电压。

• DC triggered from active HiGH or active LOW inputs

• Retriggerable for very long pulses up to 100% duty factor

• Direct reset terminates output pulse

• Specified from 0℃ to +70℃

• Packaging information: DlP16/SOP16

The 74HC125; 74HCT125 is a quad buffer/line driver with 3-state outputs controlled by the output enable inputs (nOE). A HIGH on nOE causes the outputs to assume a high impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

The 74HC132; 74HCT132 is a quad 2-input NAND gate with Schmitt-trigger inputs. Schmitt trigger inputs transform slowly changing input signals into sharply defined jitter-free output