Octal 3-State Noninverting D Flip-Flop with LSTTL-Compatible Inputs

High−Performance Silicon−Gate CMOS

The MC74HCT374A may be used as a level converter for interfacing TTL or NMOS outputs to High−Speed CMOS inputs. The HCT374A is identical in pinout to the LS374.

Data meeting the setup and hold time is clocked to the outputs with the rising edge of Clock. The Output Enable does not affect the state of the flip−flops, but when Output Enable is high, the outputs are forced to the high−impedance state. Thus, data may be stored even when the outputs are not enabled.

The HCT374A is identical in function to the HCT574A, which has the input pins on the opposite side of the package from the output pins. This device is similar in function to the HCT534A, which has inverting outputs.

Features

• Output Drive Capability: 15 LSTTL Loads

• TTL/NMOS−Compatible Input Levels

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 μA

• In Compliance With the JEDEC Standard No. 7.0 A Requirements

• Chip Complexity: 276 FETs or 69 Equivalent Gates

• Improvements over HCT374

— Improved Propagation Delays

— 50 Lower Quiescent Power

— Improved Input Noise and Latchup Immunity

• These Devices are Pb−Free and are RoHS Compliant

MC74HCT374AN属于集成电路（IC） > 触发器。安森美半导体公司制造生产的MC74HCT374AN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。