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LMS485ECMX

更新时间： 2024-01-14 20:13:47

品牌	Logo	应用领域
美国国家半导体 - NSC		总线收发器
页数	文件大小	规格书
13页	247K
描述
Low Power RS-485 / RS-422 Differential Bus Transceiver

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中文翻译

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技术参数
数据手册

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LMS485ECMX 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP, DIP8,.3	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.81
差分输出：	YES	驱动器位数：	1
高电平输入电流最大值：	0.000002 A	输入特性：	SCHMITT TRIGGER
接口集成电路类型：	LINE TRANSCEIVER	接口标准：	EIA-422-B; TIA-422-B; EIA-485-A; TIA-485-A; V.11; X.27
JESD-30 代码：	R-PDIP-T8	JESD-609代码：	e3
长度：	9.817 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-40 °C
最小输出摆幅：	1.5 V	最大输出低电流：	0.004 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP8,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
最大接收延迟：	200 ns	接收器位数：	1
座面最大高度：	5.08 mm	子类别：	Line Driver or Receivers
最大压摆率：	0.5 mA	最大供电电压：	5.25 V
最小供电电压：	4.75 V	标称供电电压：	5 V
表面贴装：	NO	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
最大传输延迟：	60 ns	宽度：	7.62 mm

LMS485ECMX 数据手册

November 2003

LMS485E

Low Power RS-485 / RS-422 Differential Bus Transceiver

General Description

Features

n Meet ANSI standard RS-485 and RS-422

n Data rate 2.5 Mbps

The LMS485E is a low power differential bus/line transceiver

designed for high speed bidirectional data communication on

multipoint bus transmission lines. It is designed for balanced

transmission lines. It meets ANSI Standards TIA/EIA

RS422-B, TIA/EIA RS485-A and ITU recommendation and

V.11 and X.27. The driver outputs and receiver inputs have

15kV ESD protection. The LMS485E combines a TRI-

n Single supply voltage operation, 5V

n Wide input and output voltage range

n Thermal shutdown protection

n Short circuit protection

n Low quiescent current 800µA (max)

n Allows up to 32 transceivers on the bus

n Open circuit fail-safe for receiver

n Extended operating temperature range −40˚C to 85˚C

n Drop-in replacement to MAX485E

n Available in 8-pin SOIC and 8-pin DIP packages

™

STATE differential line driver and differential input receiver,

both of which operate from a single 5.0V power supply. The

driver and receiver have an active high and active low,

respectively, that can be externally connected to function as

a direction control. The driver outputs and receiver inputs are

internally connected to form a differential input/output (I/O)

bus port that is designed to offer minimum loading to bus

whenever the driver is disabled or when V_CC= 0V. These

ports feature wide positive and negative common mode

voltage ranges, making the device suitable for multipoint

applications in noisy environments. The LMS485E is avail-

able in 8-Pin SOIC and 8-pin DIP packages. It is a drop-in

replacement to Maxim’s MAX485E.

Applications

n Low power RS-485 systems

n Network hubs, bridges, and routers

n Point of sales equipment (ATM, barcode scanners,…)

n Local area networks (LAN)

n Integrated service digital network (ISDN)

n Industrial programmable logic controllers

n High speed parallel and serial applications

n Multipoint applications with noisy environment

Typical Application

20086601

A typical multipoint application is shown in the above figure. Terminating resistor, RT are typically required but only located at the two ends of the cable.

Pull-up and pull-down resistors maybe required at the end of the bus to provide fail-safe biasing. The biasing resistors provide a bias to the cable when all

drivers are in TRI-STATE, See National Application Note, AN-847 for further information.

DS200866

www.national.com

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与LMS485ECMX相关器件

型号	品牌	获取价格	描述	数据表
LMS485ECMX/NOPB	TI	获取价格	LINE TRANSCEIVER, PDSO8
LMS485ECNA	NSC	获取价格	Low Power RS-485 / RS-422 Differential Bus Transceiver
LMS485ECNA/NOPB	TI	获取价格	LINE TRANSCEIVER, PDIP8, DIP-8
LMS485EIM	NSC	获取价格	Low Power RS-485 / RS-422 Differential Bus Transceiver
LMS485EIMX	NSC	获取价格	Low Power RS-485 / RS-422 Differential Bus Transceiver
LMS485EIMX/NOPB	TI	获取价格	LINE TRANSCEIVER, PDSO8, SOIC-8
LMS485EINA	NSC	获取价格	Low Power RS-485 / RS-422 Differential Bus Transceiver
LMS485EINA/NOPB	TI	获取价格	LINE TRANSCEIVER, PDIP8, DIP-8
LMS485IM	NSC	获取价格	5V Low Power RS-485 / RS-422 Differential Bus
LMS485IMX	NSC	获取价格	5V Low Power RS-485 / RS-422 Differential Bus

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