DC1851A - 

Demonstration Board Dual Multiprotocol Transceiver, Half/Full Duplex RS485 Switching


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Product Information

Demonstration Board LTC2872
Linear Technology
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Product Overview

DC1851A is a demo board for the LTC2872 RS232/RS485 dual multiprotocol transceiver with integrated termination. 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. The RS485 receivers support up to 256 nodes per bus, and feature full failsafe operation for floating, shorted or terminated inputs. An integrated DC/DC boost converter uses a small inductor and one capacitor, eliminating the need for multiple supplies for driving RS232 levels.
  • 3V to 5.5V supply voltage
  • 20Mbps RS485 and 500Kbps RS232
  • Automatic selection of integrated RS485 (120ohm) and RS232 (5Kohm) termination resistors
  • Logic loopback mode
  • High ESD of ±16KV on line I/O
  • 1.7V to 5.5V logic interface
  • Supports up to 256 RS485 nodes
  • RS485 receiver full failsafe eliminates UART lockup


Communications & Networking

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