LTC2855 Datasheet | Linear Technology

Features Integrated, Logic-Selectable 120Ω Termination Resistor - 3.3V Supply Voltage - 20Mbps Maximum Data Rate - No Damage or Latchup Up to ±25k V HBM - High Input Impedance Supports 256 Nodes .. (C, I-Grade) - Operation Up to 125°C (H-Grade) - Guaranteed Failsafe Receiver Operation Over the Entire mon Mode Range - Current Limited Drivers and Thermal Shutdown - Delayed Micropower Shutdown: 5μA Maximum (C, I-Grade) - Power Up/Down Glitch-Free Driver Outputs - Low Operating Current: 370μA Typical in Receive Mode - patible with TIA/EIA-485-A Specifications - Available in 10-Pin 3mm × 3mm DFN, 12-Pin 4mm × 3mm DFN and 16-Pin SSOP Packages - LTC2854/LTC2855 3.3V 20Mbps RS485/RS422 Transceivers with Integrated Switchable Termination DESCRIPTION The LTC®2854 and LTC2855 are low power, 20Mbps RS485/RS422 transceivers operating on 3.3V supplies. The receiver includes a logic-selectable 120Ω termination, one-eighth unit load supporting up to 256 nodes per bus (C, I-Grade), and a failsafe feature that guarantees a high output state under conditions of floating or shorted inputs. The driver maintains a high output impedance over the entire mon 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 LTC2854 to withstand ±25k V (human body model) and the LTC2855 to withstand ±15k V on the transceiver interface pins without latchup or damage. PRODUCT SELECTION GUIDE PART NUMBER LTC2854 LTC2855 DUPLEX HALF FULL PACKAGE DFN-10 SSOP-16, DFN-12 APPLICATIONS - - - Low Power RS485/RS422 Transceiver Level Translator Backplane Transceiver , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION LTC2854 RO RE TE DE DI D R LTC2854 R RO RE TE DE D DI LTC2854 at 20Mbps into...