An versatile multiprotocol transceiver
can have below features:
- Support of both RS-485 and RS-232
interface, with MODE configuration pins. If logic and bus pins are shared
between both interfaces, no interference/loading from unused interface to the
active interface must be supported.
- Support switching between half
duplex and full duplex RS-485 configurations.
- Support integrated 120Ω
switchable termination for bus pins in RS-485 configuration.
- Support integrated 5kΩ resistor
for RS-232 receivers.
- Support integrated charge pump
for RS-232 signaling that can operate from either 3.3V or 5V supply. This
enables overall small solution size without the need for additional voltage
rails and the device can just run off a single low voltage bus supply.
- Additional features such as slew
rate control for both RS-232 and RS-485 drivers, shutdown pin to achieve
ultra-low (µA) current consumption, and diagnostic loopback modes can benefit
the applications.