* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
* : Products list (parametric search)
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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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它是一种具有SPDT配置的总线开关,规定在切换时两个开关不能同时打开。
TBBM是“Brake Before Make”(先断后合)的缩写,指的是两个开关必须断开的时间,以防止两个开关同时接通。
通过设置该规定,可以防止两个信号短路。
※一般来说,开关接通称为合,开关断开称为断。
以TC7PCI3212MT(2差分通道1-2多路复用器/解复用器)的数据表为例进行简要说明。表1列出了交流特性规定的先断后合。规定了在电源电压(VCC=3.3 V ± 0.3 V)下的最小值(3 ns)和最大值(9 ns)。换句话说,当在两个开关之间进行切换时,设计为两个开关在3 ns到9 ns的时间内始终都处于断开的状态。
请参考图1,了解TBBM的测量方法。
在电源电压(VCC=3.3 V)下,(Bn+/Bn-)和(Cn+/Cn-)端子固定在1.2 V,SEL端子在高电平和低电平之间切换,以切换两个开关。 如果在切换时存在两个开关同时断开的时间段,An+/An-端子将变为低电平(VOL)。它测量两个开关同时断开的时间。
表1:TC7PCI3212MT的TBBM规格
该规格也适用于负载开关等。
以下文档也包含相关信息。