MC74VHCT74A数据手册集成电路（IC）的触发器规格书PDF

描述 Description

The MC74VHCT74A is an advanced high speed CMOS D-type flip-flop fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. The signal level applied to the D input is transferred to Q output during the positive going transition of the Clock pulse. Reset (RD) and Set (SD) are independent of the Clock (CP) and are accomplished by setting the appropriate input Low. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7V, allowing the interface of 5V systems to 3V systems. The VHCT inputs are compatible with TTL levels. This device can be usedas a level converter for interfacing 3.3V to 5.0V, because it has full 5V CMOS level output swings. The VHCT74A input structures provide protection when voltages between 0V and 5.5V are applied, regardless of the supply voltage. The output structures also provide protection when VCC=0V. 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: fmax = 60MHz (Typ) at VCC = 5V
• Low Power Dissipation: ICC = 2 A (Max) at TA = 25°C
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 4.5V to 5.5V Operating Range
• Low Noise: VOLP = 0.8V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
• Chip Complexity: 128 FETs or 32 Equivalent Gates
• Pb-Free Packages are Available

简介

MC74VHCT74A属于集成电路（IC）的触发器。由制造生产的MC74VHCT74A触发器触发器是能够存储单个逻辑状态或信息“位”的基本数字存储器件。这些器件至少有两个输入；一个或多个用于传递要存储的数据，另一个用于指示存储该数据的时间点。不同的触发器类型，例如 D（延迟）、SR（置位复位）和 JK，对提供给其输入的信号有不同的响应，可用于实现不同的逻辑功能。这些器件与锁存器的不同之处在于它们是边缘敏感器件，其保持的逻辑状态仅在接收到有效时钟信号时才会改变。