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MC74VHC245DW 产品描述
八路总线收发器 - 摩托罗拉公司
MC74VHC245是一种先进的高速CMOS八进制总线
收发器与硅栅CMOS工艺制造。它实现了高
同时保持高速运转,类似相当于双极肖特基TTL
CMOS低功耗。
它旨在为双向数据之间的异步通信
巴士。数据传输的方向是确定的水平
目录输入。输出使能引脚(OE)可以使用禁用的设备,所以
巴士的有效隔离。
所有输入都配备了防静电放电保护电路。
•高速:TPD = 4.0ns(典型值)在VCC = 5V
•低功耗:ICC =4毫安(最大值)在TA = 25℃
•高抗干扰:VNIH = VNIL = 28%VCC
•掉电保护电源提供了对输入
•平衡传输延迟
•专为2V至5.5V工作范围
•低噪声:VOLP = 1.2V(最大值)
•引脚和功能兼容其他标准逻辑系列
•闭锁性能超过300毫安
•防静电性能:HBM的2000V;机模型> 200V
•芯片的复杂性:308 FET或77等效门
应用笔记
1。不要强迫一个I / O引脚上的信号时,它是一个积极的输出,则可能损坏
发生。
2。所有浮动(高阻抗)输入或I / O引脚必须固定方式
上拉或下拉电阻器或总线终端芯片。
3。总线和VCC端子之间形成的寄生二极管。因此,
的VHC245不能用于接口5V直接3V系统。
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