Datasheet > LMS1487IMX

LMS1487IMX

更新时间： 2024-11-06 22:24:07

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
5V Low Power RS-485 / RS-422 Differential Bus Transceiver

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技术参数
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LMS1487IMX 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	SOP, SOP8,.25	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.2	差分输出：	YES
驱动器位数：	1	输入特性：	DIFFERENTIAL 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-PDSO-G8	JESD-609代码：	e0
长度：	4.902 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：	SOP
封装等效代码：	SOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	235
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：	1.753 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：	YES	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn85Pb15)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	最大传输延迟：	60 ns
宽度：	3.899 mm	Base Number Matches：	1

LMS1487IMX 数据手册

April 2003

LMS1487

5V Low Power RS-485 / RS-422 Differential Bus

Transceiver

General Description

Features

n Meet ANSI standard RS-485-A and RS-422-B

n Data rate 2.5 Mbps

The LMS1487 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

n Single supply voltage operation, 5V

n Wide input and output voltage range

n Thermal shutdown protection

n Short circuit protection

™

V.11 and X.27. The LMS1487 combines a TRI-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, respec-

tively, that can be externally connected to function as a

direction control. The driver and receiver differential inputs

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

bus ports that are 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 LMS1487 is avail-

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

socket replacement to Maxim’s MAX1487

n Low quiescent current 320µA

n Allows up to 128 transceivers on the bus

n Open circuit fail-safe for receiver

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

Drop-in replacement to MAX1487

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

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

20053001

A Typical multipoint application is shown in the above figure. Terminating resistors, 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.

DS200530

www.national.com

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与LMS1487IMX相关器件

型号	品牌	获取价格	描述	数据表
LMS1487INA	NSC	获取价格	5V Low Power RS-485 / RS-422 Differential Bus Transceiver
LMS1585	NSC	获取价格	5A and 3A Low Dropout Fast Response Regulators
LMS1585A	NSC	获取价格	5A and 3A Low Dropout Fast Response Regulators
LMS1585A	TI	获取价格	5A、13V 线性稳压器
LMS1585A_15	TI	获取价格	LMS1585A 5A/LMS1587 5A and 3A Low Dropout Fast Response Regulators
LMS1585ACS-1.5	NSC	获取价格	5A and 3A Low Dropout Fast Response Regulators
LMS1585ACS-1.5	TI	获取价格	5A、13V 线性稳压器 \| KTT \| 3 \| 0 to 125
LMS1585ACS-1.5/NOPB	TI	获取价格	5A、13V 线性稳压器 \| KTT \| 3 \| 0 to 125
LMS1585ACS1.5EP	NSC	获取价格	IC VREG 1.5 V FIXED POSITIVE LDO REGULATOR, 1.4 V DROPOUT, PSSO3, PLASTIC, TO-263, 3 PIN,
LMS1585ACS-3.3	NSC	获取价格	5A and 3A Low Dropout Fast Response Regulators

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