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LTC2870 Datasheet

LTC2870 Datasheet

RS232/RS485 Multiprotocol Transceivers with Integrated Termination
Part No.: LTC2870
Page: 42 Pages
Size: 970 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-12-14 14:38:36
DataSheet: Download

LTC2870 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC2870CFE#PBF Tube 50 LTC2870FE 1 28 0°C ~ 70°C 28-Lead Plastic TSSOP  
LTC2870CFE#TRPBF Reel 2000 LTC2870FE 1 28 0°C ~ 70°C 28-Lead Plastic TSSOP  
LTC2870CFE#TRMPBF Reel 500 LTC2870FE 1 28 0°C ~ 70°C 28-Lead Plastic TSSOP  
LTC2870IFE#PBF Tube 50 LTC2870FE 1 28 -40°C ~ 85°C 28-Lead Plastic TSSOP  
LTC2870IFE#TRPBF Reel 2000 LTC2870FE 1 28 -40°C ~ 85°C 28-Lead Plastic TSSOP  
LTC2870IFE#TRMPBF Reel 500 LTC2870FE 1 28 -40°C ~ 85°C 28-Lead Plastic TSSOP  
LTC2870CUFD#PBF Tube 73 2870 1 28 0°C ~ 70°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870CUFD#TRPBF Reel 2500 2870 1 28 0°C ~ 70°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870CUFD#TRMPBF Reel 500 2870 1 28 0°C ~ 70°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870IUFD#PBF Tube 73 2870 1 28 -40°C ~ 85°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870IUFD#TRPBF Reel 2500 2870 1 28 -40°C ~ 85°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870IUFD#TRMPBF Reel 500 2870 1 28 -40°C ~ 85°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870HUFD#PBF Tube 73 2870 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870HUFD#TRPBF Reel 2500 2870 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC2870HUFD#TRMPBF Reel 500 2870 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC2870 Datasheet(PDF)

LTC2870 Datasheet(Picture)

LTC2870 Features

  • One RS485 and Two RS232 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
  • High ESD: ±26kV (LTC2870)
  • Logic Loopback Mode
  • 1.7V to 5.5V Logic Interface
  • Supports Up to 256 RS485 Nodes
  • RS485 Receiver Failsafe Eliminates UART Lockup
  • H-Grade Available (–40°C to 125°C)
  • Available in 28-Pin 4mm × 5mm QFN and TSSOP (LTC2870)

LTC2870 Applications

  • Software Selectable RS232/RS485/RS422 Interface
  • Point-of-Sale Terminals
  • Cable Repeaters
  • Protocol Translators

LTC2870 Description

The LTC2870 are robust pin-configurable multiprotocol transceivers, supporting RS232, RS485, and RS422 protocols, operating on a single 3V to 5.5V supply. The LTC2870 can be configured as two RS232 single-ended transceivers or one RS485 differential transceiver 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 tiny 2mm × 1.6mm inductor and one capacitor, eliminating the need for multiple supplies for driving RS232 levels.

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