描述 Description

The MC74LCX574 is a high performance, non-inverting octal D-type flip-flop operating from a 2.3 to 3.6V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5V allows MC74LCX574 inputs to be safely driven from 5V devices. The MC74LCX574 consists of 8 edge-triggered flip-flops with individual D-type inputs and 3-state true outputs. The buffered clock and buffered Output Enable (OEbar) are common to all flip-flops. The eight flip-flops will store the state of individual D inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CP) transition. With the OEbar LOW, the contents of the eight flip-flops are available at the outputs. When the OEbar is HIGH, the outputs go to the high impedance state. The OEbar input level does not affect the operation of the flip-flops. The LCX574 flow through design facilitates easy PC board layout.

特性 Features

? Designed for 2.3 to 3.6V VCC Operation
? 5V Tolerant - Interface Capability With 5V TTL Logic
? Supports Live Insertion and Withdrawal
? IOFF Specification Guarantees High Impedance When VCC = 0V
? LVTTL Compatible
? LVCMOS Compatible
? 24mA Balanced Output Sink and Source Capability
? Near Zero Static Supply Current in All Three Logic States (10?A) Substantially Reduces System Power Requirements
? Latchup Performance Exceeds 500mA
? ESD Performance: Human Body Model >2000V; Machine Model >200V
? Pb-Free Packages are Available*

簡介

MC74LCX574屬于集成電路（IC）的觸發(fā)器。由制造生產(chǎn)的MC74LCX574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。