LTC2872 Series
RS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination
Manufacturer: Analog Devices Inc
Catalog
RS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination
| Part | Operating Temperature [Max] | Operating Temperature [Min] | Receiver Hysteresis | Number of Drivers/Receivers [custom] | Number of Drivers/Receivers [custom] | Duplex | Type | Protocol | Voltage - Supply [Min] | Voltage - Supply [Max] | Package / Case | Data Rate | Mounting Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc LTC2872CUHF#PBF | 70 ░C | 0 °C | 190 mV | 4 | 4 | Full | Transceiver | Multiprotocol | 3 V | 5.5 V | 38-WFQFN Exposed Pad | 20 Mbps | Surface Mount |
Analog Devices Inc LTC2872CUHF#TRPBF | 70 ░C | 0 °C | 190 mV | 4 | 4 | Full | Transceiver | Multiprotocol | 3 V | 5.5 V | 38-WFQFN Exposed Pad | 20 Mbps | Surface Mount |
Analog Devices Inc LTC2872IUHF#TRPBF | 85 °C | -40 °C | 190 mV | 4 | 4 | Full | Transceiver | Multiprotocol | 3 V | 5.5 V | 38-WFQFN Exposed Pad | 20 Mbps | Surface Mount |
Key Features
• 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
Description
AI
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.ApplicationsFlexible RS232/RS485/RS422 InterfaceSoftware Selectable Multiprotocol Interface PortsPoint-of-Sale TerminalsCable RepeatersProtocol TranslatorsPROFIBUS-DP Networks