74HC/HCT573 是一个带三态输出的8位D型锁存器。该器件具有锁存使能(LE)和输出使能(OE)。当 LE为高电平时，输入端的数据进入锁存器中。在这种情况下，锁存器是透明的，每次其相应的D输入更改时，锁存器输出都会更改。当LE为低电平时，锁存器存储LE 下降沿前一个建立时间的输入端信息。0E上的高电平使输出呈现高阻态。0E输入的运行不会影响锁存器的状态。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。

The 74HC574 and 74HCT574 are 8-bit D-type transparent latches with 3-state outputs. The device features a clock (CP) and output enable (OE) inputs. The flip-flops will store the state of their individual D-inputs that meet the set-up and hold time requirements on the LOW-to-HIGH clock (CP) transition. A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Operation of the OE input does not affect the state of the flip-flops. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

The 74HC/HCT4053 is a triple single-pole double-throw analog switch (3x $PDT) suitable for use inanalog or digital 2:1 multiplexer/demultiplexer applications. Each switch features a digital seleet input(Sn), two independent inputs/outputs (nY0 and nYl) and a common inputoutput (nZ). A digital enableinput (E) is common to all switches. When E is HlGH, the switches are turned off, lnputs include clampdiodes, This enables the use of current limiting resistors to interlace inputs to voltages in excess of Vcc.

74HC4060D 是一款 14bit 二进制计数器，电路包含振荡器驱动模块和一个 14 位的二进制计数器模 块。电路可以通过外围电路将振荡器驱动模块用作 RC 振荡器或用作晶振的驱动。电路提供复位端口(RESET)用于复位计数器的计数值同时控制振荡器模块的开关。当复位端口为高电平时，将复位计 数器(复位值 0000H)并关闭振荡器。计数器中所有的触发器都是异步边沿触发式的。计数器的计数 状态在 φi(φo)的下降沿改变。