* : 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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降压(2.5V→1.8V)和升压(1.8V→2.5V)电压转换可以通过使用具有容错功能的CMOS逻辑IC、单电源或双电源电平转换器(缓冲器类型)以及双电源总线开关。
以下是一个简例。
有关详细的选择方法,请参阅以下应用说明.。
→ Tips for Selecting Level Shifters(Voltage Translation ICs) (PDF:2.62MB)
降压转换:
输入容限功能允许通过电平转换将较高电压转换为较低电压,例如从2.5 V至1.8 V。例如,输入容限功能允许将3.3 V电压施加至输入端而不消耗额外电流,即使VCC=0 V。(图 1)
对于使用CMOS逻辑 IC的输入容限功能的降压转换,请确保最大低电平输入电压在VIL范围内。(表1)
表1:输入电压规格(74LCX244)
升压转换:
如果驱动IC的高电平输出电压(VOH)满足被驱动IC的高电平输入电压(VIH),即可执行较低电压至较高电压(例如,1.8 V至2.5 V)的电平转换,因为VOH几乎等于供电电压(VCC)。(图2)
表2:CMOS逻辑 IC的VIH规格示例(74LCX00FT)
以下文档也包含相关信息。