1. Device Overview & Purpose

️· What they are: These are RS-485 transceiver integrated circuits (ICs). Transceivers are devices that both transmit and receive data.
️· Purpose: Designed for robust and reliable data communication over RS-485 networks. RS-485 is a standard for serial communication often used for industrial and building automation applications because it allows multiple devices to communicate over a single cable.
️· Legacy: Originally a Sipex product, now part of Exar Corporation.

2. Key Features

️· RS-485 Compliance: Adheres to the RS-485 standard.
️· ESD Protection: Very high ESD (Electrostatic Discharge) tolerance: ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). This means they are highly resistant to damage from static electricity.
️· Robustness: Designed for harsh industrial environments.
️· Shutdown Mode: Includes a shutdown feature to reduce power consumption when not in use.
️· Data Rate: The datasheet doesn’s explicitly mention a max data rate, so you’d need to refer to the full datasheet for this.
️· Power Supply: The datasheet does not specify the Power Supply. Need to refer to the full datasheet.

3. ESD Testing and Protection Details

️· Methods: Uses two common ESD test methods:
- Human Body Model (HBM): Simulates discharge from a person touching the device.
- IEC Contact Discharge: Simulates discharge through a direct contact.
️· Test Circuits: The datasheet includes diagrams (Figures 7 and 8) illustrating the test setups used for HBM and IEC testing.
️· Waveform: Figure 9 depicts a typical ESD test waveform.

4. Important Notes and Disclaimers

️· Changes Possible: Exar Corporation reserves the right to modify the products.
️· Patent Infringement: No guarantees regarding patent infringement are made.
️· Life Support Applications: The devices are *not* recommended for life-support applications without explicit written assurance and risk mitigation.
️· Contact for technical inquiries: uarttechsupport@exar.com

5. Revision History

️· June 2009 (Revision 1.0.0): Significant formatting update to conform to Exar Corporation standards, incorporating the new logo and branding.

Where to Find More Information

️· Full Datasheet: This is an excerpt. For complete specifications, including operating characteristics, pinouts, timing diagrams, and power supply requirements, you *must* refer to the full datasheet from Exar Corporation's website ([www.exar.com](http://www.exar.com/)).