LTC2870IUFD#TRPBF

LTC2870IUFD#TRPBF is a RS232/RS485 multiprotocol transceiver with integrated termination. The LTC2870 can be configured as two RS232 single ended transceivers or one RS485 differential transceiver on shared I/O lines. It offers independent control of two RS232 transceiver and one RS485 transceiver, each on dedicated I/O lines. Pin-controlled integrated termination resistors allow for easy interface reconfiguration, eliminating external resistors and control relays. Half-duplex switches allow four-wire and two-wire RS485 configurations. Loopback mode steers the driver inputs to the receiver outputs for diagnostic self-test. Application includes software selectable RS232/RS485/RS422 interface, point-of-sale terminals, cable repeaters, protocol translators.

• One RS485 and two RS232 transceivers
• Supply voltage range from 3V to 5.5V (TA = 25°C)
• 20Mbps RS485 and 500Kbps RS232
• Automatic selection of integrated RS485 (120 ohm) and RS232 (5Kohm) termination resistors
• Half-/full-duplex RS485 switching, High ESD ±26kV
• Logic loopback mode, 1.7V to 5.5V logic interface
• Supports up to 256 RS485 nodes
• RS485 receiver failsafe eliminates UART lockup
• Maximum data rate is 20Mbps min at (TA = 25°C. VCC = VL = 3.3V)
• 28 lead plastic QFN package, operating temperature range from -40°C to 85°C