LTC2872
PRODUCTIONRS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination
- Part Models
- 4
- 1ku List Price
- Starting From $7.66
Overview
- 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.
Applications
- Flexible RS232/RS485/RS422 Interface
- Software Selectable Multiprotocol Interface Ports
- Point-of-Sale Terminals
- Cable Repeaters
- Protocol Translators
- PROFIBUS-DP Networks
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Spec Notice 1
Video 1
Product Selector Card 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC2872CUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2872CUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2872IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2872IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers 3 | ||
| LTC2870 | PRODUCTION | RS232/RS485 Multiprotocol Transceivers with Integrated Termination |
| LTC2871 | PRODUCTION | RS232/RS485 Multiprotocol Transceivers with Integrated Termination |
| LTC2873 | PRODUCTION | Single-Bus RS485/RS232 Multiprotocol Transceiver with Switchable Termination |
Tools & Simulations
IBIS Model 1
Evaluation Kits
LTC2872 RS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination