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XR19L200

Exar Corporation
Part Number XR19L200
Manufacturer Exar Corporation
Description SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
Published Aug 20, 2007
Detailed Description www.DataSheet4U.com APRIL 2006 PRELIMINARY XR19L200 REV. P1.0.2 SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER...
Datasheet PDF File XR19L200 PDF File

XR19L200
XR19L200

Overview
www.
DataSheet4U.
com APRIL 2006 PRELIMINARY XR19L200 REV.
P1.
0.
2 SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER GENERAL DESCRIPTION The XR19L200 (L200) is a highly integrated device that combines a single channel Universal Asynchronous Receiver and Transmitter (UART) and an RS-232 transceiver.
The L200 is designed to operate with a single 3.
3V or 5V power supply.
The L200 is fully compliant with EIA/TIA-232-F Standards from a +3.
0V to +5.
5V power supply.
The device operates at 250 Kbps 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 +/-15kV ESD on the RS-232 lines, while maintaining RS-232 output levels.
The L200 operates in three different modes: Awake, Partial Sleep, and Full Sleep.
Each mode can be invoked via hardware or software.
In the Awake mode, all functions are active.
In the Partial Sleep mode, the internal crystal oscillator or charge pump is turned off.
In Full Sleep mode, the internal crystal oscillator and the charge pump is shut down.
All 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 a 3.
0 V to 5.
5V operation • Up to 250 Kbps data transmission rate • 45us sleep mode exit (charge pump to full power) • ESD protection for RS-232 I/O pins at ■ ■ ■ +/-15kV - Human Body Model +/-15kV - IEC 1000-4-2, Air-Gap Discharge +/- 8kV - IEC 1000-4-2, Contact Discharge • Software compatible with industry standard 16550 UART • Intel/Motorola bus select • Quarter-modem interface (TXD, RXD) • Sleep modes to conserve battery power • Wake-up interrupt upon exiting low power modes FIGURE 1.
BLOCK DIAGRAM VCC (3.
0 to 5.
5V) XTAL1 XTAL2 GND ACP C2+ C1+ C2- C1- VREF+ Crystal Osc/Buffer BRG Charge Pu...


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