XR19L210 SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER JULY 2007 REV. 1.0.2 APPLICATIONS GENERAL DESCRIPTION Battery-Powered Equipment The XR19L210 (L210) is a highly integrated device that combines a full-featured single channel Universal Handheld and Mobile Devices Asynchronous Receiver and Transmitter (UART) and an Handheld Terminals RS-232 transceiver. The L210 is designed to operate with a Industrial Peripheral Interfaces single 3.3V or 5V power supply. The L210 is fully compliant with EIA/TIA-232-F Standards from a +3.0V to +5.5V power Point-of-Sale (POS) Systems supply. The device operates at 250 Kbps data rate with FEATURES worst case 3K ohms load. Both RS-232 driver outputs and receiver inputs can operate in harsh electrical environments Meets true EIA/TIA-232-F Standards from a 3.0 V to 5.5V of +/-15V without damage and can survive multiple +/-15kV operation ESD on the RS-232 lines, while maintaining RS-232 output levels. Up to 250 Kbps data transmission rate The L210 operates in four different modes: Awake, Partial 45us sleep mode exit (charge pump to full power) Sleep, Full Sleep and Power-Save. Each mode can be ESD protection for RS-232 I/O pins at invoked via hardware and/or software. In the Awake mode, +/-15kV - Human Body Model all functions are active. In the Partial Sleep mode, the internal crystal oscillator or charge pump is turned off. In +/-15kV - IEC 61000-4-2, Air-Gap Discharge Full Sleep mode, the internal crystal oscillator and the +/- 8kV - IEC 61000-4-2, Contact Discharge charge pump is shut down. In the Power-Save mode, the Software compatible with industry standard 16550 UART core logic is isolated from the control signals (chip select, Intel/Motorola bus select read/write strobes, address and data bus lines). All the RS- Half-modem interface (TXD, RXD, RTS, CTS) 232 receivers remain active in any of these four modes. Sleep and Power-save modes to conserve battery power Wake-up interrupt upon exiting low power modes FIGURE 1. BLOCK DIAGRAM VREF+ Crystal PwrSave BRG Charge Pump Osc/Buffer A2:A0 VREF- 16 Byte D7:D0 TX FIFO TX TXD IOR 16 Byte RX RXD 5K RX FIFO IOW (R/W ) CS INT (IRQ ) RTS RTS RESET (RESET ) Modem I/Os I/M CTS CTS *5 V 5K Tolerant Inputs UART RS-232 Transceiver XR19L210 Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com Intel or Motorola Bus Interface UART Registers XTAL1 XTAL2 VCC (3.0 to 5.5V) GND ACP C2+ C2- C1+ C1-XR19L210 SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER REV. 1.0.2 FIGURE 2. PIN OUT OF THE DEVICE 40 39 38 37 36 35 34 33 32 31 40 39 38 37 36 35 34 33 32 31 CTS 1 30 C1- CTS 1 30 C1- RXD 2 29 C1+ RXD 2 29 C1+ VCC NC 3 28 RESET NC 3 28 RESET I/M 4 27 GND I/M 4 27 GND 40-pin QFN 40-pin QFN D5 5 26 INT D5 5 26 IRQ Intel Bus Mode Motorola Bus Mode GND GND 6 25 A0 GND 6 25 A0 D6 7 24 A1 D6 7 24 A1 D7 8 23 A2 D7 8 23 A2 CS 9 22 VREF- CS 9 22 VREF- TXD 10 21 C2- TXD 10 21 C2- 11 12 13 14 15 16 17 18 19 20 11 12 13 14 15 16 17 18 19 20 ORDERING INFORMATION PART NUMBER PACKAGE OPERATING TEMPERATURE RANGE DEVICE STATUS XR19L210IL40 40-QFN -40C to +85C Active 2 RTS NC NC NC PwrSave D4 XTAL1 D3 XTAL2 D2 ACP D1 IOW D0 GND VCC IOR VREF+ C2+ NC RTS NC NC NC PwrSave D4 XTAL1 D3 XTAL2 D2 ACP D1 R/W D0 GND VCC NC VREF+ C2+ NC