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电平移位器

电平移位器

Bridging Independent Voltage Domains

Full-featured, power efficient systems often contain subsystems with different voltage requirements. For example, a wearable may normally operate at 1.8 V, but when charging, portions of the design will operate at the USB standard 5 V. Similarly, the display may operate at a different voltage than the sensors. Often, a number of discrete passive or fixed-function level shift devices are needed to make these voltage domains work together. With GreenPAK™, getting these different voltage domains working together, efficiently and with the flexibility of programmable mixed-signal, is a snap with any of our Dual Supply part numbers.

格林帕克™ 水平移动的好处：

  • Dual Supply
    • 双电源GreenPAK无需外部上拉电阻器即可实现高效率电平转换
    • 双电源GreenPAK可支持VDD的1.8 V至5.0 V和VDD2的1.8 V至VDD
  • System Stability
    • 格林帕克is zero code – Implementing features in hardware ensures stability
    • GreenPak可以集成许多组件，确保更少的失败点
  • Power Consumption
    • 格林帕克is low-power – Can operate continuously without ruining power budget
  • 大小
    • 格林帕克is as small as 1.2 mm²
  • Flexibility
    • GreenPAK GPIO可配置-上拉/下拉电阻器、推挽、漏极开路等。
    • GreenPAK GPIO路由灵活–确保PCB路由的复杂性最低
    • GreenPak集成了许多常见的组件 - 生成自定义时序和逻辑，以进一步消除外部组件，同时桥接电压域和信号要求

Uni-directional

The simplest form of level-shift is uni-directional. Shifting a single direction, up or down, is easy in GreenPAK since all GPIO can be configured as inputs or outputs

关键设计考虑因素

  • Number of Signals – GreenPAK can support up to 9 inputs/8 outputs on a single voltage domain
  • IO配置–GreenPAK的GPIO上可配置的上拉/下拉电阻器使与任何IC的通信变得简单
例1。格林帕克实施单向水平位移

Example 1. Timing Diagram
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带专用端口的双向

Similar to uni-directional, using GreenPAK’s configurable GPIO to dedicate specific pins or groups of pins as input or output is easy. Each pin tied to a specific voltage domain can be configured independently allowing information to flow from lower to higher VDD or higher to lower VDD

关键设计考虑因素

  • Number of Signals – GreenPAK can support up to 9 inputs/8 outputs on a single voltage domain
  • IO配置–GreenPAK的GPIO上可配置的上拉/下拉电阻器使与任何IC的通信变得简单
Example 2. Bi-directional level-shift with dedicated ports implemented in GreenPAK

示例2.时序图
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带外部方向指示灯的双向

With GreenPAK it is also possible to dual-purpose certain GPIO as digital input AND output using the output enable pin to control the direction.

关键设计考虑因素

  • 方向信号极性–使用GreenPAK配置为逆变器的集成LUT可以适应任何信号极性
  • 方向信号源–使用GreenPAK，方向信号输入可以来自任一电压域
Example 3. Bi-directional level-shift with external direction signal implemented in GreenPAK

例3。时序图
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双向，自动感应

Using GreenPAK’s configurable digital and timing resources, it is even possible to implement an auto-sensing, bi-directional, level-shift solution such as the I2C Level-shift shown inAN-1104..

关键设计考虑因素

  • 响应时间–GreenPAK能够达到400 kHz标准I2C

Example 4. Auto-sensing bi-directional I2C level-shift

例4。AN-1104-SLG46620V中的I2C电平偏移

Dual Supply GreenPAK

GreenPAK通常可以在一个小设备中实现多个功能。这并不局限于水平移动应用程序。只需一个GreenPAK设备就可以根据设计要求和资源配置实现粘合逻辑、定时调整、复位、电源排序、LED控制等。雷竞技安卓下载

下面是我们的双电源GreenPAK设备列表和每个电压域专用的GPIO数量。

零件号 VDD IO VDD2 IO
SLG46121V电源 5 4
SLG46535V 7 4
SLG46538V 9 8
SLG46621V电压 9 8

GreenPAK开发工具和软件

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