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DS1487M

更新时间： 2024-02-04 11:58:33

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
8页	141K
描述
Low Power RS-485 1⁄4 Unit Load Multipoint Transceiver

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DS1487M 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：	5.67
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：	DIFFERENTIAL SCHMITT TRIGGER
接口集成电路类型：	LINE TRANSCEIVER	接口标准：	EIA-485
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：	70 °C	最低工作温度：
最小输出摆幅：	1.5 V	最大输出低电流：	0.004 A
输出极性：	COMPLEMENTARY	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：	400 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
标称供电电压：	5 V	表面贴装：	NO
技术：	CMOS	温度等级：	COMMERCIAL
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：	80 ns
宽度：	7.62 mm	Base Number Matches：	1

DS1487M 数据手册

July 1998

DS1487

Low Power RS-485 ⁄ Unit Load Multipoint Transceiver

General Description

Features

n Meets TIA/EIA RS-485 multipoint standard

n Allows up to 128 transceivers on the bus (¹⁄

The DS1487 is a low-power transceiver for RS-485 and

RS-422 communication. The device contains one driver and

one receiver. The drivers slew rate allows for operation up to

2.0 Mbps (see Applications Information section). The trans-

U.L.)

n Guaranteed full load output voltage (V_OD3

n Low quiescent current: 200 µA typ

n −7V to +12V common-mode input voltage range

n TRI-STATE outputs on driver and receiver

n AC performance:

— Driver transition time: 25 ns typ

— Driver propagation delay: 40 ns typ

— Driver skew: 1 ns typ

)

ceiver presents ¹

⁄ unit loading to the RS-485 bus allowing up

to 128 nodes to be connected together without the use of re-

peaters.

The transceiver draws 200 µA of supply current when un-

loaded or fully loaded with the driver disabled and operates

from a single +5V supply.

The driver is short-circuit current limited and is protected

against excessive power dissipation by thermal shutdown

circuitry that places the driver outputs into TRI-STATE^®

(High Impedance state) under fault conditions. The driver

guarantees a minimum of 1.5V differential output voltage

with maximum loading across the common mode range

(V_OD3).

— Receiver propagation delay: 200 ns typ

— Receiver skew: 20 ns typ

n Half-duplex flow through pinout

n Operates from a single 5V supply

n Current-limiting and thermal shutdown for driver

overload protection

n Pin and functional compatible with MAX1487

The receiver has

a failsafe feature that guarantees a

logic-high output if the input is open circuit.

The DS1487 is available in surface mount and DIP pack-

ages.

Connection and Logic Diagram

Truth Table

DRIVER SECTION

DIP and SOIC

(Note 1)

RECEIVER SECTION

A-B

DS012920-1

(Note 1)

*Note: Non Terminated, Open Input only

≥+0.2V

≤−0.2V

Order Number

DS1487N

Temp. Range

0˚C to +70˚C

Package/###

DIP/N08E

OPEN (Note 1)

DS1487M

SOP/M08A

indeterminate

TRI-STATE

Note 1: Non Terminated, Open Input only

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS012920

www.national.com

12 3 4 5 6 7 8

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与DS1487M相关器件

型号	品牌	描述	获取价格	数据表
DS1487M/NOPB	NSC	IC LINE TRANSCEIVER, PDSO8, PLASTIC, SOP-8, Line Driver or Receiver	获取价格
DS1487M/NOPB	TI	Low Power RS-485 Unit Load Multipoint Transceiver	获取价格
DS1487MX	NSC	IC LINE TRANSCEIVER, PDSO8, SOP-8, Line Driver or Receiver	获取价格
DS1487MX	TI	Low Power RS-485/1/4 Unit Load Multipoint Transceiver 8-SOIC 0 to 70	获取价格
DS1487MX/NOPB	TI	Low Power RS-485/1/4 Unit Load Multipoint Transceiver 8-SOIC 0 to 70	获取价格
DS1487N	NSC	Low Power RS-485 1⁄4 Unit Load Multipoint Transceiver	获取价格

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