Toshiba has a lineup of dual power supply level shift bus switches that can convert voltage levels.
You can select the required circuit configuration (SPST, SPDT, etc.) and the number of circuits from the product lineup.
This product group has a configuration similar to a simple switch, does not have drive capability, but is suitable for high-speed signal transmission.
Toshiba also has a product lineup of dual power bus buffers with drive capability as level shifters.
|TC7MPB9307||SPST||8||TSSOP/US||1.65 to 5.0||2.3 to 5.5||1.4＠VCCA=1.65
11/9 @RL=1ｋΩ,CL=30 pF
15/13 @RL=1 kΩ,CL=30 pF
This is a 2-power supply level shift bus switch product that converts the level with an external pull-up resistor.
Since it is a bus switch type, it can be used as an interface between two power supplies without signal direction control (no DIR control).
This product can be used for I2C communication.
Single pole single throw (SPST) and single pole double throw (SPDT) products are available.
Must be used in systems with potential differences where VCCA<VCCB.
When the power supply voltage of the master device is lowered from 3.3 V to 1.8 V, the output (SCL / SDA) voltage (VOUT) from the master device falls below the input threshold (VIH) of the slave device, causing malfunction.
Also, the output (SDA) voltage of the slave device will exceed the master's power supply voltage, which can damage the master device.
In such a case, you can easily convert the signal level by placing a level shifter in between.
In the above cases, TC7WPB9306 (SDA, SCL) is an excellent choice. An external pull-up resistor (about 1 kΩ) is required to raise the output to the power supply voltage.