ISL41334IRZ

The ISL41334IRZ is a 2-port dual protocol Transceiver Interface IC where each port can be independently configured as a single RS-485, RS-422 transceiver or as a dual RS- 232 transceiver. In RS-485 mode, the transceiver supports both the RS-485 and RS-422 differential communication standards. The receiver features full failsafe operation, so the Rx outputs remain in a high state if the inputs are open or shorted together. The transmitters support up to three data rates, two of which are slew rate limited for problem free communications. The charge pump disables when both ports are in RS-485 mode, thereby saving power, minimizing noise and eliminating the charge pump capacitors. Both RS-232 and RS-485 modes features loopback and shutdown functions. Loopback internally connects the Tx outputs to the corresponding Rx input, to facilitate board level self test implementation. The outputs remain connected to the loads during loopback, so connection problems can be detected.

• Flow-through pin-outs simplify board layouts
• Large differential VOUT for improved noise Immunity
• Full failsafe mode
• Loopback mode facilitates board self test functions
• Logic supply pin eases operation in mixed supply systems
• 20Mbps RS-485 Fast speed
• 460kbps RS-485 Slew rate limited
• 115kbps RS-485 Slew rate limited
• Up to 650kbps fast RS-232 data rate
• 42µA Low current shutdown mode