Features and Benefits
- Four RS232 and Two RS485 Transceivers
- 3V to 5.5V Supply Voltage
- 20Mbps RS485 and 500kbps RS232
- Automatic Selection of Integrated RS485 (120Ω) and RS232 (5kΩ) Termination Resistors
- Half-/Full-Duplex RS485 Switching
- Logic Loopback Mode
- High ESD: ±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
- Available in 38-Pin 5mm × 7mm QFN Package
The LTC2872 is a robust pin-configurable transceiver that supports RS232, RS485, and RS422 standards while operating on a single 3V to 5.5V supply. The LTC2872 can be configured as four RS232 single-ended transceivers or two RS485 differential transceivers, or combinations of both, on shared I/O lines.
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.
- Flexible RS232/RS485/RS422 Interface
- Software Selectable Multiprotocol Interface Ports
- Point-of-Sale Terminals
- Cable Repeaters
- Protocol Translators
- PROFIBUS-DP Networks
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.