The LTC2870/71/72 is a family of multiprotocol transceivers with switchable integrated termination for 3.3V and 5V systems. These devices integrate pin-controlled termination resistors that automatically switch in or out to match the transceiver’s protocol selection of RS232 or RS485, allowing for easy interface reconfiguration and elimination of external resistors and control relays. The LTC2870 and LTC2871 can be configured as two RS232 single-ended transceivers or one RS485 differential transceiver on shared (LTC2870) or dedicated (LTC2871) I/O lines, while the LTC2872 can be configured as four RS232 transceivers or two RS485 transceivers, or combinations of both, on shared I/O lines. This on-the-fly configurability helps reduce component count for multiprotocol networks.
The LTC2870/71/72 family consists of multiorotocol transceivers with switchable integrated termination designed for 3.3V and 5V systems. These devices integrate pin-controlled termination resistors that automatically switch in or out to match the protocol selection of RS232 or RS485, allowing for easy interface reconfiguration without external resistors or control relays.
The LTC2870 and LTC2871 can be configured as two RS232 single-ended transceivers or one RS485 differential transceiver on shared or dedicated I/O lines. The LTC2872 offers greater flexibility, configurable as four RS232 transceivers, two RS485 transceivers, or combinations of both. This on-the-fly configurability helps reduce component count for multiprotocol networks.
| Supply Voltage Range | 1.8V to 5.5V |
|---|---|
| RS485 Data Rate | 20Mbps |
| RS232 Data Rate | 500kbps |
| ESD Rating (LTC2870) | +26kV |
| ESD Rating (LTC2871/72) | +16kV |
| RS485 Termination Resistance | 120 Ohm |
These devices support RS232, RS485, and RS422 protocols.
Yes, they integrate pin-controlled termination resistors that automatically switch in or out to match the protocol selection.