The SP3220ET is an RS-232 transceiver manufactured by Exar Corporation, designed to facilitate serial communication according to TIA/EIA-232-F standards. This device is widely used in applications requiring a reliable interface between RS-232 ports and logic-level signals.

Applications:

• Notebook and laptop computers
• Subnotebooks
• Palmtop PCs
• Handheld PCs
• Printers
• Point-of-sale (POS) equipment
• Modems

Features:

• Meets all EIA-232 and V.28 specifications
• Operates from a single +3.0V to +5.5V power supply
• Requires only 0.1μF external capacitors
• Two drivers and two receivers
• Data rates up to 250kbps
• Available in TSSOP and SSOP packages
• Enhanced ESD specifications: ±15kV Human Body Model (HBM) and ±8kV IEC61000-4-2 Contact Discharge

Benefits:

• Minimized Board Space: Requires small external capacitors, saving valuable space.
• Robust Data Transmission: Enhanced ESD protection ensures reliable communication.
• Simplified Power Design: Operates from a single power supply.
• Wide Range of Use: Suitable for various RS-232 communication needs.
• Efficient Performance: Supports data rates up to 250kbps.

Additional Details:

The SP3220ET integrates a charge pump circuit to generate the necessary RS-232 voltage levels from a single supply voltage, simplifying system design and reducing component count. It contains two drivers for converting TTL/CMOS signals to RS-232 levels and two receivers for the reverse conversion. The enhanced ESD protection makes it more resilient to electrostatic discharge events. The 'T' designation commonly relates to the packaging or specific testing conditions applied to the device.