描述 Description

High-Performance Silicon-Gate CMOSThe MC74HC573A is identical in pinout to the LS573. The devices are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.These latches appear transparent to data (i.e., the outputs change asynchronously) when Latch Enable is high. When Latch Enable goes low, data meeting the setup and hold time becomes latched.The HC573A is identical in function to the HCT373A but has the data inputs on the opposite side of the package from the outputs to facilitate PC board layout.

特性 Features

? Output Drive Capability: 15 LSTTL Loads
? Outputs Directly Interface to CMOS, NMOS and TTL
? Operating Voltage Range: 2.0 to 6.0 V
? Low Input Current: 1.0 mA
? In Compliance with the Requirements Defined by JEDEC Standard No. 7A
? Chip Complexity: 218 FETs or 54.5 Equivalent Gates
? Pb-Free Packages are Available*

簡(jiǎn)介

MC74HC573A屬于集成電路（IC）的鎖存器。由制造生產(chǎn)的MC74HC573A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。