LTC2851

FEATURES n 3.3V Supply Voltage n 20Mbps Maximum Data Rate n No Damage or Latchup Up to ±15kV HBM n High Input Impedance Supports 256 Nodes (C-, I‑Grade) n Operation Up to 125°C (H-Grade) n Guaranteed Failsafe Receiver Operation Over the Entire Common Mode Range n Current Limited Drivers and Thermal Shutdown n Delayed Micropower Shutdown: 5µA Maximum (C-, I-Grade) n Power Up/Down Glitch-Free Driver Outputs n Low Operating Current: 370µA Typical in Receive Mode n Compatible with TIA/EIA-485-A Specifications n Available in 8-Pin and 10-Pin 3mm × 3mm DFN, 8-Pin and 10-Pin MSOP, and 8-Pin and 14-Pin SO Packages APPLICATIONS n Low Power RS485/RS422 Transceiver n Level Translator n Backplane Transceiver LTC2850/LTC2851/LTC2852 3.3V 20Mbps RS485/RS422 Transceivers DESCRIPTION The LTC®2850, LTC2851 and LTC2852 are low power, 20Mbps RS485/RS422 transceivers operating on 3.3V supplies. The receiver has a 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 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 thermal shutdown. Enhanced ESD protection allows these parts to withstand up to ±15kV (human body model) on the transceiver interface pins without latchup or damage. PART ...