描述 Description

The MC74LCX573 is a high performance, non-inverting octal transparent latch 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 MC74LCX573 inputs to be safely driven from 5V devices. The MC74LCX573 contains 8 D-type latches with 3-state standard outputs. When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this condition, the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is LOW, the latches store the information that was present on the D inputs a setup time preceding the HIGH-to-LOW transition of LE. The 3-state standard outputs are controlled by the Output Enable (OEbar) input. When OEbar is LOW, the standard outputs are enabled. When OEbar is HIGH, the standard outputs are in the high impedance state, but this does not interfere with new data entering into the latches. The LCX573 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 (10mA) Substantially Reduces System Power Requirements
? Latchup Performance Exceeds 500mA
? ESD Performance: Human Body Model >2000V; Machine Model >200V
? Pb-Free Packages are Available*

簡(jiǎn)介

MC74LCX573屬于集成電路（IC）的鎖存器。由制造生產(chǎn)的MC74LCX573鎖存器鎖存器是類似于觸發(fā)器的基本數(shù)字存儲(chǔ)設(shè)備，但是不同之處在于，在鎖存使能（或類似命名）信號(hào)處于有效邏輯狀態(tài)的任何時(shí)間，保持的邏輯狀態(tài)都可以改變?！巴该鳌辨i存器還允許設(shè)備輸出在鎖存使能信號(hào)有效時(shí)反映輸入的當(dāng)前狀態(tài)，而相反的是，狀態(tài)僅在保持狀態(tài)已固定時(shí)改變。