The LTC2859 and LTC2861 are low power, 20Mbps RS485/422 transceivers operating on 5V supplies. The receiver includes a logic-selectable 120Ω termination, one-eighth unit load supporting up to 256 nodes per bus, and a fail-safe feature that guarantees a high output state under conditions of floating or shorted inputs. The driver features a logic-selectable low-EMI 250kbps operating mode, and maintains a high output impedance over the entire common mode range when disabled or when the supply is removed. Excessive power dissipation caused by bus contention or a fault is prevented by current limiting all outputs and by a thermal shutdown. Enhanced ESD protection allows the LTC2859 and LTC2861 to withstand ±15kV (human body model) on the transceiver interface pins without latch-up or damage. Applications * Low Power RS485/RS422 Transceiver * Level Translator * Backplane Transceiver * Integrated, Logic-Selectable 120Ω Termination Resistor * 20Mbps Max Data Rate * No Damage or Latch-up to ESD: ±15kV HBM * High Input Impedance Supports 256 Nodes * 250kbps Low-EMI Mode * Guaranteed Fail-safe Receiver Operation Over the Entire Common Mode Range * Current Limited Drivers and Thermal Shutdown * Delayed Micropower Shutdown (5μA Max) * Power Up/Down Glitch-Free Driver Outputs * Low Operating Current (900μA Max in Receive Mode) * Meets All TIA/EIA-485-A Specifications * Available in 10-Pin 3mm × 3mm DFN, 12-Pin 4mm × 3mm DFN and 16-Pin SSOP Packages https://elecena.pl/product/256103/20mbps-rs485-transceiver-with-integrated-switchable-termination 2007-03-03 https://elecena.pl/product/256103/20mbps-rs485-transceiver-with-integrated-switchable-termination 2017-10-09 https://elecena.pl/product/256103/20mbps-rs485-transceiver-with-integrated-switchable-termination 2025-01-19