MC74HCT374A屬于集成電路（IC）的觸發(fā)器。由安森美半導體公司制造生產(chǎn)的MC74HCT374A觸發(fā)器觸發(fā)器是能夠存儲單個邏輯狀態(tài)或信息“位”的基本數(shù)字存儲器件。這些器件至少有兩個輸入；一個或多個用于傳遞要存儲的數(shù)據(jù)，另一個用于指示存儲該數(shù)據(jù)的時間點。不同的觸發(fā)器類型，例如 D（延遲）、SR（置位復位）和 JK，對提供給其輸入的信號有不同的響應，可用于實現(xiàn)不同的邏輯功能。這些器件與鎖存器的不同之處在于它們是邊緣敏感器件，其保持的邏輯狀態(tài)僅在接收到有效時鐘信號時才會改變。

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