Exar's latest product is the RS-232 (EIA / TIA-232) transceiver family, designed for 3V to 5.5V power supplies. The XR32220, XR32430 and XR32431 include an adjustable low-voltage logic interface, which simplifies their use in low-voltage and multi-voltage systems.
In many applications, RS-232 transceivers are connected to UARTs, MCUs, and other logic devices that use a power supply less than 3.3V. The XR32220 and XR32431 have low-voltage logic pins (VL) that can be used to adjust the logic output level and input threshold of the transceiver to be compatible with lower supply voltage logic. The VL range is from 1.65V to 5.5V. The adjustable low-voltage interface eliminates the need for a level shifter / translator between the transceiver and the UART or MCU.
The XR32220, XR32430 and XR32431 are available in RoHS-compliant, green / halogen-free, space-saving 4mm x 4mm QFN (XR32220) and 5mm x 5mm QFN (XR32430 / 31) packages.
