XR19L202 Datasheet | Exar

DESCRIPTION The XR19L202 (L202) is a highly integrated device that bines a full-featured two channel Universal Asynchronous Receiver and Transmitter (UART) and RS232 transceivers. The L202 is designed to operate with a single 3.3V or 5V power supply. The L202 is fully pliant with EIA/TIA-232-F Standards from a +3.3V to +5.5V power supply. The device operates at 1 Mbps data rate with worst case 3K ohms load. Both RS-232 driver outputs and receiver inputs can operate in harsh electrical environments of +/-15V without damage and can survive multiple +/-15k V ESD on the RS-232 lines, while maintaining RS-232 output levels. The L202 operates in four different modes: Active, Partial Sleep, Full Sleep and Power-Save. Each mode can be invoked via hardware or software. Upon power-up, the L202 is in the Active mode where the UART and RS-232 transceiver function normally. In the Partial Sleep mode, the internal crystal oscillator of the UART or charge pump of the RS-232 transceiver is turned off. In Full Sleep mode, both the crystal oscillator and the charge pump are turned off. While the UART is in the Sleep mode, the Power-Save mode isolates the core logic from the control signals (chip select, read/write strobes, address and data bus lines) to minimize the power consumption. The RS-232 receivers remain active in any of these four modes. APPLICATIONS - Battery-Powered Equipment - Handheld and Mobile Devices - Handheld Terminals - Industrial Peripheral Interfaces - Point-of-Sale (POS) Systems 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 - - - +/-15k V - Human Body Model +/-15k V - IEC 61000-4-2, Air-Gap Discharge +/- 8k V - IEC 61000-4-2, Contact Discharge - Software patible with industry standard 16550 UART - Intel/Motorola bus select - plete modem interface - Sleep and Power-save modes to conserve battery power -...