The LTC2870IFE from Linear Technology is a robust pin-configurable multiprotocol transceiver, supporting RS232, RS485, and RS422 protocols, operating on a single 3V to 5.5V supply. It can be configured as two RS232 single-ended transceivers or one RS485 differential transceiver on shared I/O lines. Features

• Multiprotocol support: RS232, RS485, and RS422 protocols
• Wide operating voltage range: 3V to 5.5V
• Integrated DC/DC boost converter: Eliminates the need for multiple supplies for driving RS232 levels
• Low power consumption: 10µA in shutdown mode
• High ESD tolerance: ±15kV HBM
• Robust performance in harsh environments: AEC-Q100 qualified

Applications

• Industrial automation
• Building automation
• Security systems
• Point-of-sale systems
• Test and measurement equipment

Description The LTC2870IFE is a single-chip solution for multiprotocol communication. It features an integrated DC/DC boost converter that generates the RS232 voltage levels from the single supply voltage. This eliminates the need for multiple supplies or charge pumps, simplifying the circuit design and reducing the cost. The LTC2870IFE is also highly ESD tolerant and can withstand up to ±15kV HBM. This makes it ideal for use in harsh environments where ESD is a concern. The LTC2870IFE is available in a 28-pin TSSOP package. It is AEC-Q100 qualified for automotive applications.

Benefits The LTC2870IFE offers a number of benefits for designers of multiprotocol communication systems, including:

• Reduced design complexity: The integrated DC/DC boost converter and pin-configurable transceiver simplify the circuit design and reduce the number of components required.
• Reduced cost: The elimination of multiple supplies and the reduction of the number of components reduce the overall cost of the system.
• Improved reliability: The high ESD tolerance and AEC-Q100 qualification make the LTC2870IFE ideal for use in harsh environments.

Example application The LTC2870IFE can be used in a variety of applications, including the following example:

A factory automation system uses RS485 communication to connect multiple sensors and actuators. The LTC2870IFE is used to interface between the RS485 bus and the system's microcontroller. The integrated DC/DC boost converter generates the RS485 voltage levels from the system's 5V supply voltage. The LTC2870IFE's high ESD tolerance and AEC-Q100 qualification make it ideal for use in the harsh industrial environment.

The LTC2870IFE is a versatile and reliable multiprotocol transceiver that is ideal for a wide range of applications.