Datasheet > XR19L222

XR19L222

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
53页	1089K
描述
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

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XR19L222 数据手册

XR19L222

TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

MAY 2007

REV. 1.0.0

APPLICATIONS

GENERAL DESCRIPTION

• Battery-Powered Equipment

• Handheld and Mobile Devices

• Handheld Terminals

• Industrial Peripheral Interfaces

• Point-of-Sale (POS) Systems

The XR19L222 (L222) is a highly integrated device that

combines

full-featured two channel Universal

Asynchronous Receiver and Transmitter (UART) and RS-

232 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 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 +/-15kV

ESD on the RS-232 lines, while maintaining RS-232 output

levels.

FEATURES

• Meets true EIA/TIA-232-F Standards from +3.3V to +5.5V

operation

• Up to 1 Mbps data transmission rate

The L222 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

L222 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.

• 45us sleep mode exit (charge pump to full power)

• ESD protection for RS-232 I/O pins at

■ +/-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

VREF+

*5 V Tolerant

Inputs

Crystal

Osc/Buffer

PwrSave

A2:A0

BRG

Charge Pump

VREF-

64 Byte

TX & RX

FIFO

TXA

RXA

TXDA

D7:D0

RXDA

IOR#

RTSA#

RTSA

DTRA#

CTSA#

DTRA

CTSA

IOW# (R/W#)

CSA# (CS#)

CSB#

Modem

I/Os

DSRA#

RIA#

DSRA

RIA

CDA#

CDA

INTA (IRQ#)

INTB

Channel A

Ch A Transceiver

CDB#

RIB#

CDB

RIB

DSRB#

CTSB#

DTRB#

RTSB#

TXB

DSRB

CTSB

DTRB

RTSB

TXDB

TXB

RESET (RESET#)

I/M#

Channel B

Transceiver

RXB

RXDB

RXB

(See Figure 6)

RXBSEL

UART

RS-232 Transceiver

XR19L222

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

12 3 4 5 6 7...53

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与XR19L222相关器件

型号	品牌	获取价格	描述	数据表
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
XR19L402	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L402_09	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L402IL48	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L402IL48-F	EXAR	获取价格	Serial I/O Controller, 2 Channel(s), 1MBps, CMOS, 7 X 7 MM, 0.90 MM HEIGHT, 0.50 MM PITCH,

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