Datasheet > XR19L220

XR19L220

更新时间： 2024-11-22 03:53:03

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
43页	859K
描述
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

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中文翻译

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数据手册

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XR19L220 数据手册

PRELIMINARY

SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

XR19L220

APRIL 2006

REV. P1.0.2

APPLICATIONS

GENERAL DESCRIPTION

• Battery-Powered Equipment

• Handheld and Mobile Devices

• Handheld Terminals

• Industrial Peripheral Interfaces

• Point-of-Sale (POS) Systems

The XR19L220 (L220) is a highly integrated device that

combines

full-featured single channel Universal

Asynchronous Receiver and Transmitter (UART) and an

RS-232 transceiver. The L220 is designed to operate with a

single 3.3V or 5V power supply. The L220 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.

FEATURES

• Meets true EIA/TIA-232-F Standards from +3.0V to +5.5V

operation

• Up to 250 Kbps data transmission rate

The L220 operates in four different modes: Active, Partial

Sleep, Full Sleep and Power-Save. Each mode can be

invoked via hardware or software. In the Active mode, all

functions are active. 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, the

internal crystal oscillator and the charge pump is turned off.

In the Power-Save mode, the core logic is isolated from the

control signals (chip select, read/write strobes, address and

data bus lines) to further reduce the power consumption. All

the RS-232 receivers remain active in any of these four

modes.

• 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

• Complete modem interface

• Sleep and Power-save modes to conserve battery power

• Wake-up interrupt upon exiting low power modes

FIGURE 1. BLOCK DIAGRAM

VREF+

Crystal

Osc/Buffer

PwrSave

BRG

16 Byte

Charge Pump

A2:A0

VREF-

TXD

D7:D0

IOR#

TX FIFO

16 Byte

RX FIFO

RXD

IOW# (R/W#)

CS#

RTS#

RTS

DTR#

CTS#

DTR

CTS

INT (IRQ#)

RESET (RESET#)

I/M#

Modem

I/Os

DSR#

RI#

DSR

*5 V

Tolerant

Inputs

CD#

UART

RS-232 Transceiver

XR19L220

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

12 3 4 5 6 7...43

中文翻译

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与XR19L220相关器件

型号	品牌	获取价格	描述	数据表
XR19L220_07	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L220IL40	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L220IL40-F	EXAR	获取价格	暂无描述
XR19L222	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L222IL64	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L222IL64-F	EXAR	获取价格	Line Transceiver, 3 Func, 3 Driver, 3 Rcvr, CMOS, 9 X 9 MM, 0.90 MM HEIGHT, GREEN, QFN-64
XR19L400	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400_09	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400IL40	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400IL40-F	EXAR	获取价格	Serial I/O Controller, 1 Channel(s), 1MBps, CMOS, 6 X 6 MM, 0.90 MM HEIGHT, GREEN, QFN-40

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