Similar to the industry leading SP339, the XR34350 includes integrated cable termination and four configuration modes that allow all three protocols to be used interchangeably over a single cable or connector with no additional switching components. The RS-232 mode provides three drivers and five receivers to support all eight signals required for the DB9 serial port (3TX/5RX), while RS-485/422 modes include both half and full duplex (1TX/1RX).
The XR34350 operates from either a 3.3 or 5V supply, consumes only 2mA typical supply current, and offers a shutdown mode for low power (10µA) standby operation. The high speed drivers operate up to 20Mb/s in RS-485/422 modes and up to 1Mb/s in RS-232 mode. All drivers can be slew limited to 250kb/s in any mode to minimise EMI.
Dale Wedel, Vice President, High Performance Analogue, Exar, commented: “The XR34350 simplifies customer designs. The wide driver output swing allows improved interoperability with older model bar code scanners, PS2 keyboards/mice and other RS-232 peripherals.”
All bus pins are protected against severe ESD events up to ±15kV HBM (Human Body Model), ±15kV IEC-61000-4-2 Air Gap and ±8kV IEC 61000-4-2 Contact Discharge.
The XR34350 is available now in a RoHS compliant, green/halogen free, space-saving 6mm x 6mm, 40-pin QFN package. Pricing starts at $5.40 in quantities of 1,000.