描述 Description

The MC74VHCT373A is an advanced high speed CMOS octal latch with 3-state output fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. This 8-bit D-type latch is controlled by a latch enable input and an output enable input. When the output enable input is high, the eight outputs are in a high impedance state. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3V to 5.0V, because it has full 5V CMOS level output swings. The VHCT373A input and output (when disabled) structures provide protection when voltages between 0V and 5.5V are applied, regardless of the supply voltage. These input and output structures help prevent device destruction caused by supply voltage - input/output voltage mismatch, battery backup, hot insertion, etc.

特性 Features

? High Speed: tPD = 7.7ns (Typ) at VCC = 5V
? Low Power Dissipation: ICC = 4μA (Max) at TA = 25 C
? TTL-Compatible Inputs: VIL = 0.8V; VIH = 2.0V
? Power Down Protection Provided on Inputs and Outputs
? Balanced Propagation Delays
? Designed for 4.5V to 5.5V Operating Range
? Low Noise: VOLP = 1.6V (Max)
? Pin and Function Compatible with Other Standard Logic Families
? Latchup Performance Exceeds 300mA
? ESD Performance: HBM > 2000V; Machine Model > 200V
? Chip Complexity: 196 FETs or 49 Equivalent Gates
? Pb-Free Packages are Available

簡介

MC74VHCT373A屬于集成電路（IC）的鎖存器。由制造生產的MC74VHCT373A鎖存器鎖存器是類似于觸發(fā)器的基本數(shù)字存儲設備，但是不同之處在于，在鎖存使能（或類似命名）信號處于有效邏輯狀態(tài)的任何時間，保持的邏輯狀態(tài)都可以改變?！巴该鳌辨i存器還允許設備輸出在鎖存使能信號有效時反映輸入的當前狀態(tài)，而相反的是，狀態(tài)僅在保持狀態(tài)已固定時改變。