XR19L222 - Exar Corporation

XR19L222 TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

The XR19L222 (L222) is a highly integrated device that combines a full-featured two channel Universal Asynchronous Receiver and Transmitter (UART) and RS232 transceivers. The L222 is designed to operate with a single 3.3V or 5V power supply. The L222 is fully compliant with EIA/TIA-232-F Standards from a +3.3V to +5.5V power supply. The device operates at 1 .

Features

• Meets true EIA/TIA-232-F Standards from +3.3V to +5.5V operation
• Up to 1 Mbps data transmission rate
• 45us sleep mode exit (charge pump to full power)
• ESD protection for RS-232 I/O pins at
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■ +/-15kV - Human Body Model +/-15kV - 61000-4-2, Air-Gap Discharge +/- 8kV - 61000-4-2, Contact Discharge
• Software compatible with industry standard 16550 UART
• Intel/Motorola bus select
• Complete modem interface
• Sleep and Power-save modes to conserve battery power
• Wake-up interrupt upon exiting low power modes FIGURE 1. BLOCK DIAGRAM VCC (3.3 to 5.5V) XTAL1 XTAL2 R_EN GND FAST .