EEWORLDEEWORLDEEWORLD

Part Number

Search

XR19L400

Description
1-Channel Integrated UART and RS-485 Transceiver
CategoryTopical application    Wireless rf/communication   
File Size397KB,45 Pages
ManufacturerExar [Exar Corporation]
Download Datasheet Compare View All

XR19L400 Overview

1-Channel Integrated UART and RS-485 Transceiver

PRELIMINARY
APRIL 2007
XR19L400
REV. P1.0.0
SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
GENERAL DESCRIPTION
The XR19L400 (L400) is a highly integrated device that
combines a full-featured single channel Universal
Asynchronous Receiver and Transmitter (UART) and RS-
485 transceivers. The L400 is designed to operate with a
3.3V to 5V power supply. The L400 is fully compliant with
RS-485 Standards.
The L400 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
L400 is in the Active mode where the UART and RS-485
transceiver function normally. In the Partial Sleep mode, the
internal crystal oscillator of the UART or charge pump of the
RS-485 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-485 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 RS-485 Standards from +3.0V to +5.5V
operation
Up to 8 Mbps data transmission rate
45us sleep mode exit (charge pump to full power)
ESD protection for RS-485 I/O pins at
+/-15kV - Human Body Model
+/- 8kV - IEC 61000-4-2, Contact Discharge
+/- 15kV - IEC 61000-4-2, Air-Gap 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
F
IGURE
1. B
LOCK
D
IAGRAM
VCC33
XTAL1
XTAL2
R_EN
GND
VCC50
ACP
C1+
*5 V Tolerant
Inputs
Intel or Motorola Bus Interface
PwrSave
A2:A0
D7:D0
IOR#
IOW# (R/W#)
CS# (CS#)
INT (IRQ#)
RESET (RESET#)
I/M#
HALF/FULL#
Crystal
Osc/Buffer
BRG
Charge Pump
TX+
TX-
RX+
RX-
VCC33
64 Byte
TX FIFO
UART Registers
64 Byte
RX FIFO
TX
RX
CTS#
Modem
I/Os
DSR#
RI#
CD#
RS-485 Transceiver
XR19L400
UART
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
C1-

XR19L400 Related Products

XR19L400 XR19L400IL40
Description 1-Channel Integrated UART and RS-485 Transceiver 1-Channel Integrated UART and RS-485 Transceiver
Fire alarm
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 20:03[/i]...
探路者 Mobile and portable
[Zero-knowledge ESP8266 tutorial] Quick Start 16 Use of WiFiScan library to scan WiFi near you
[i=s]This post was last edited by roc2 on 2019-10-29 18:19[/i]Last time, we have learned and shared the operation process of ESP8266 one-key network configuration. Next, we need to understand how ESP8...
roc2 stm32/stm8
Eclipse cross compilation problem
Hello everyone, I want to ask about the cross-compilation problem of Eclipse. I have set up the configuration in Eclipse, but when I run it, it says that the cross-compilation tool is not found. Then ...
zengjiangyi Embedded System
ARM question: When an exception occurs in thumb state, how to enter arm state?
When an exception occurs in Thumb state, does the processor automatically set to ARM state or does it need to manually modify the T bit of CPSR? ?...
liuxp_008 ARM Technology
Here is a flyback switching power supply built with TOP series switching IC, undervoltage protection. I have a question here. Please leave.
The switch IC specification is uploaded. The two resistors connected to the V pin of the TOP switch chip (in the circuit structure of Figure 1) R1 and R2 resistance calculation formula refer to Figure...
西里古1992 Analog electronics
C program optimization problem
[i=s]This post was last edited by dontium on 2015-1-23 13:27[/i] I recently wrote a project and the program was debugged, but the real-time performance did not meet the requirements, so I chose the op...
eeworld000 Analogue and Mixed Signal

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2492  814  2734  1328  2719  51  17  56  27  55 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号