Using these parts to translate down is very simple. Because the inputs are tolerant to 5.5 V at any valid V_CC, they can be used to down translate. The input can be any level above V_CC up to 5.5 V and the output will equal the V_CC level, which can be as low as 1.8 V. One important advantage to down translating using this part is that the I_CC current will remain less than or equal to the specified value.

Down translation possibilities with SN74LVxTxx:

• With 1.8-V V_CC from 2.5 V, 3.3 V, or 5 V down to 1.8 V.
• With 2.5-V V_CC from 3.3 V or 5 V down to 2.5 V.
• With 3.3-V V_CC from 5 V down to 3.3 V.