8.3.2 1.8 V Logic Compatible Inputs

The TS5MP645 has 1.8 V logic compatible digital inputs for switch control. Regardless of the V_DD voltage the digital input thresholds remained fixed, allowing a 1.8 V processor GPIO to control the TS5MP645 without the need for an external translator. This saves both space and BOM cost.

An example setup for a system without a 1.8 V logic compatible input is shown in Figure 22. Here the supply mismatch between the process and its GPIO output and the supply to the switch require a translator.

Figure 22. System Without 1.8 V Logic Compatible Inputs

With the 1.8 V logic compatibility in the TS5MP645, the translator is built in to the device so that the external components are no longer needed, simplifying the system design and overall cost.

Figure 23. System With 1.8 V Logic Compatible Inputs