TIA-232 pins from ESD damage. This conversion is needed for the digital bus interface with the outside world. Onboard charge pumps and voltage inverters generate the necessary positive and negative voltage levels from 3.0V to 5.5V power supplies. Suitable for portable applications where a single 3.0V to 5.5V power supply is available, the transceiver is fully compatible with mixed 3.0V and 5.0V and 5.0V-only applications. The devices deliver increased data communications speeds and low operational supply current drain to extend battery life in portable devices.
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