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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.
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What is the difference between a level-shifting bus switch type and a bus buffer type?

A bus switch type uses pullup resistors for level-shifting. Since this is a simple MOSFET switch, it does not have any inherent drive capability (Figure 1).

A bus buffer type uses the output of a CMOS structure for level-shifting. Therefore, it has an inherent drive capability and provides a digital output (Figure 2). For the drive capability, see the output current value shown in the Electrical Characteristics table in a datasheet.

The following shows the equivalent circuits of a bus switch and a bus buffer.

Figure1 Dual-Supply Bidirectional Level Shifter Without a Direction Control Signal (Bus Switch type)
Figure1 Dual-Supply Bidirectional Level Shifter Without a Direction Control Signal (Bus Switch type)
Figure 2 Dual-Supply Level Shifter (Buffer type)
Figure 2 Dual-Supply Level Shifter (Buffer type)
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