Dual D−Type Positive Edge−Triggered Flip−Flop

The MC74AC74/74ACT74 is a dual D−type flip−flop with Asynchronous Clear and Set inputs and complementary (Q,Q) outputs. Information at the input is transferred to the outputs on the

positive edge of the clock pulse. Clock triggering occurs at a voltage level of the clock pulse and is not directly related to the transition time of the positive-going pulse. After the Clock Pulse input threshold voltage has been passed, the Data input is locked out and information present will not be transferred to the outputs until the next rising edge of the Clock Pulse input.

Asynchronous Inputs:

LOW input to SD(Set) sets Q to HIGH level

LOW input to CD(Clear) sets Q to LOW level

Clear and Set are independent of clock

Simultaneous LOW on CDand SDmakes both Q and QHIGH

Features

•Outputs Source/Sink 24 mA

•′ACT74 Has TTL Compatible Inputs

•Pb−Free Packages are Available

MC74ACT74NG属于集成电路（IC） > 触发器。安森美半导体公司制造生产的MC74ACT74NG触发器触发器是能够存储单个逻辑状态或信息“位”的基本数字存储器件。这些器件至少有两个输入；一个或多个用于传递要存储的数据，另一个用于指示存储该数据的时间点。不同的触发器类型，例如 D（延迟）、SR（置位复位）和 JK，对提供给其输入的信号有不同的响应，可用于实现不同的逻辑功能。这些器件与锁存器的不同之处在于它们是边缘敏感器件，其保持的逻辑状态仅在接收到有效时钟信号时才会改变。