Telecoms, Datacoms, Wireless, IoT


RS-232 transceivers

25 November 2015 Telecoms, Datacoms, Wireless, IoT

Exar announced a family of RS-232 (EIA/TIA-232) transceivers designed to operate from 3 V to 5,5 V supplies. The XR32220, XR32430 and XR32431 include an adjustable low-voltage logic interface that simplifies their use in low-voltage and multi-voltage systems. The XR32220 and XR32431 feature a low-voltage logic pin that can be used to adjust the transceiver’s logic output levels and input thresholds for compatibility with lower supply voltage logic in the range of 1,65 V to 5,5 V. This eliminates the need for a level shifter/translator between the transceiver and UART or MCU. Auto on-line circuitry automatically wakes up from a 1 µA shutdown, while a regulated charge pump yields stable RS-232 outputs regardless of VCC variations.



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