MAX1483数据手册_max1483资源-CSDN文库

MAX485

需积分: 34 191 浏览量 2012-12-05 22:02:02 上传评论收藏 173KB PDF 举报

资源推荐

资源详情

资源评论

_______________General Description

The MAX1482 and MAX1483 are low-power trans-

ceivers for RS-485 and RS-422 communication. Both

feature slew-rate-limited drivers that minimize EMI and

reduce reflections caused by improperly terminated

cables. Data rates are guaranteed up to 250kbps.

The MAX1482/MAX1483 draw only 20µA of supply cur-

rent. Additionally, they have a low-current shutdown

mode that consumes only 0.1µA. Both parts operate

from a single +5V supply.

Drivers are short-circuit current limited and are protect-

ed against excessive power dissipation by thermal

shutdown circuitry that places the driver outputs into a

high-impedance state. The receiver input has a fail-safe

feature that guarantees a logic-high output if the input

is open circuit.

The MAX1482 is full duplex and the MAX1483 is half

duplex. Both parts have a

⁄

-unit-load input impedance

that guarantees up to 256 transceivers on the bus.

________________________Applications

Low-Power RS-485/RS-422 Networks

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

Large 256-Node LANs

____________________________Features

♦ Low 20µA Operating Current

♦ Slew-Rate Limited for Reduced EMI and

Reduced Reflections

♦ 0.1µA Low-Current Shutdown Mode

♦ Designed for RS-485 and RS-422 Applications

♦ Operate from a Single +5V Supply

♦ -7V to +12V Common-Mode Input Voltage Range

♦ Allows up to 256 Transceivers on the Bus—

Guaranteed (

⁄

-unit load)

♦ Current Limiting and Thermal Shutdown for

Driver Overload Protection

______________Ordering Information

MAX1482/MAX1483

20µA,

⁄

-Unit-Load, Slew-Rate-Limited

RS-485 Transceivers

________________________________________________________________

Maxim Integrated Products

TOP VIEW

GND

DIP/SO

GND

µMAX

MAX1483

_________________Pin Configurations

MAX1483

NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM 

DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH. 

TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.

+5V

GND

_________Typical Operating Circuits

Call toll free 1-800-998-8800 for free samples or literature.

19-0367; Rev 0; 2/95

PART

MAX1482CPD

MAX1482CSD

MAX1482EPD -40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

14 Plastic DIP

14 SO

14 Plastic DIP

MAX1482ESD -40°C to +85°C 14 SO

MAX1483CPA

0°C to +70°C 8 Plastic DIP

MAX1483CSA 0°C to +70°C 8 SO

MAX1483CUA 0°C to +70°C 8 µMAX

MAX1483EPA -40°C to +85°C 8 Plastic DIP

MAX1483ESA -40°C to +85°C 8 SO

MAX1482 appears at end of data sheet.

MAX1482/MAX1483

20µA,

⁄

-Unit-Load, Slew-Rate-Limited

RS-485 Transceivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (V

)...............................................................7V

Control Input Voltages (RE

, DE) .................-0.5V to (V

+ 0.5V)

Driver Input Voltage (DI).............................-0.5V to (V

+ 0.5V)

Driver Output Voltages ..........................................-7.5V to 12.5V

Receiver Input Voltages (A, B) ..............................-7.5V to 12.5V

Receiver Output Voltage (RO)....................-0.5V to (V

+ 0.5V)

Continuous Power Dissipation (T

= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) .800mW

8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW

14-Pin SO (derate 8.33mW/°C above +70°C)................667mW

8-Pin µMAX (derate 4.10mW/°C above +70°C) .............330mW

Operating Temperature Ranges

MAX148_C_ _ .......................................................0°C to +70°C

MAX148_E_ _.....................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

DC ELECTRICAL CHARACTERISTICS

= 5V ±5%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

= -7V

= 12V

= -7V

= 12V

Input Current

(A, B)

IN2

kΩ96-7V ≤ V

≤ 12V

R = 27Ω (RS-485), Figure 1

0.4V ≤ V

≤ 2.4V

R = 50Ω (RS-422), Figure 1

= 4mA, V

= -200mV

= -4mA, V

= 200mV

= 0V

-7V ≤ V

≤ 12V

DE, DI,

–

—

–

DE, DI,

–

—

–

MAX1483,

DE = 0V, V

= 0V or 5.25V

R = 27Ω or 50Ω, Figure 1

MAX1482,

DE = 0V, V

= 0V or 5.25V

CONDITIONS

µA±1I

OZR

Three-State (high impedance)

Output Current at Receiver

0.4V

Receiver Output Low Voltage

3.5V

Receiver Output High Voltage

mV75∆V

Receiver Input Hysteresis

V-0.2 0.2

Receiver Differential Threshold

Voltage

-150

200

µA

-100

150

1.5 5

OD2

Differential Driver Output

(with load)

V5V

OD1

Differential Driver Output (no load)

µA±2I

IN1

Logic Input Current

V0.8V

Logic Input Low Voltage

V0.2∆V

Change in Magnitude of Driver

Common-Mode Output Voltage

for Complementary Output States

V0.2∆V

Change in Magnitude of Driver

Differential Output Voltage for

Complementary Output States

V3V

Driver Common-Mode Output

Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

Receiver Input Resistance

Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device

ground unless otherwise specified.

DE, DI,

–

—

–

V2.0V

Logic Input High Voltage

MAX1482 only,

-7V < V

Y and

< 12V

µA±50I

OZD

Three-State (high impedance)

Output Current at Driver

MAX1482/MAX1483

20µA,

⁄

-Unit-Load, Slew-Rate-Limited

RS-485 Transceivers

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

= 5V ±5%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

SWITCHING CHARACTERISTICS

= 5V ±5%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

MAX1482,

RE = 0V or V

0V ≤ V

≤ V

MAX1483,

RE = 0V or V

DE = 0V, RE = V

DI = high or low, -7V ≤ V

≤ 12V (Note 2)

CONDITIONS

55 85

20 35

25 45

mA±7 ±95I

OSR

Receiver Short-Circuit Current

µA

20 35

No-Load Supply Current

µA0.1 10I

SHDN

Supply Current in Shutdown

mA35 250I

OSD

Driver Short-Circuit Current

UNITSMIN TYP MAXSYMBOLPARAMETER

DE = V

DE = 0V

DE = V

DE = 0V

Figures 4 and 6, C

= 15pF, S2 closed

Figures 4 and 6, C

= 15pF, S1 closed

Figures 4 and 6, C

= 100pF, S1 closed

Figures 4 and 6, C

= 100pF, S2 closed

PARAMETER SYMBOL MIN TYP MAX UNITS

Driver Enable to Output High t

0.2 2

Driver Output Skew to Output

, t

0.25 2 µs

Driver Enable to Output Low t

0.1 2

µs

Driver Disable Time from Low t

0.3 3.0 µs

Driver Disable Time from High t

0.3 3.0 µs

Driver Input to Output

PLH

SKEW

800

µs

CONDITIONS

Figures 3 and 5, R

DIFF

= 54Ω,

= C

= 100pF

Figures 3 and 5, R

DIFF

= 54Ω, C

= C

= 100pF

µs

Figures 3 and 5, R

DIFF

= 54Ω, C

= C

= 100pF

Driver Rise or Fall Time

PHL

Receiver Input to Output t

PLH

PHL

Figures 3 and 7, R

DIFF

= 54Ω, C

= C

= 100pF 0.25 2.25 µs

| t

PLH

- t

PHL

| Differential

Receiver Skew

SKD

Figures 3 and 7, R

DIFF

= 54Ω, C

= C

= 100pF 160 ns

Receiver Enable to Output Low t

Figures 2 and 8, C

= 15pF, S1 closed 90 ns

Receiver Enable to Output High t

Figures 2 and 8, C

= 15pF, S2 closed 90 ns

Receiver Disable Time from Low t

Figures 2 and 8, C

= 15pF, S1 closed 90 ns

Receiver Disable Time from High t

Figures 2 and 8, C

= 15pF, S2 closed 90 ns

Maximum Data Rate f

MAX

250 kbps

Time to Shutdown t

SHDN

(Note 3) 50 200 600 ns

Driver Enable from Shutdown to

Output High

ZH(SHDN)

Figures 4 and 6, C

= 100pF, S2 closed 2 µs

Driver Enable from Shutdown to

Output Low

ZL(SHDN)

Figures 4 and 6, C

= 100pF, S1 closed 2 µs

Receiver Enable from Shutdown

to Output High

ZH(SHDN)

Figures 2 and 8, C

= 15pF, S2 closed,

A - B = 2V

Receiver Enable from Shutdown

to Output Low

ZL(SHDN)

Figures 2 and 8, C

= 15pF, S1 closed,

B - A = 2V

µs

Note 2: Applies to peak current. See

Typical Operating Characteristics.

Note 3: The MAX1482/MAX1483 are put into shutdown by bringing

–

—

–

high and DE low. If the inputs are in this state for less

than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are

guaranteed to have entered shutdown. See

Low-Power Shutdown Mode

section.

剩余12页未读，继续阅读

评论收藏

内容反馈

windseeker520

粉丝: 1
资源: 16

MAX1483数据手册

MAX14830参考配置代码

MAX20087数据手册.pdf

MAX30102中文数据手册.zip_max30102 中文_max30102 中文手册_max30102接线_max30102

MAX30102中文数据手册.docx

铂热电阻采集 MAX31865 中文数据手册

中文版MAX_10数据手册

MAX485数据手册PDF文件

MAX30102数据手册和例程

GMSL串行器MAX96705数据手册完整版

MAX31855中文数据手册

MAX30102数据手册翻译_max30102_数据手册翻译_

MAX9867数据手册

MAX31865中文手册

MAX471数据手册

max31865数据手册与spi模拟程序

MAX7456中文数据手册

MAX3050数据手册

程控滤波芯片MAX262中文资料 数据手册

MAX6675中文数据手册

MAX9286-GMSL解串器数据手册

串口助手工具合集.zip

OLED显示温度和时间-STM32F103C8T6（完整程序工程+原理图+相关资料）.zip

Vivado license 永久

STM32全系列 Keil MDK pack包（当前最新离线包）

张飞硬件1~20部+笔记完整版百度网盘链接.txt

STM32HAL库+RS485+串口+定时器+Modbus协议（主机+从机测试）

AD Type C 封装库 6Pin 24Pin分享（带3D视图）

I2C主机及从机Verilog代码实现.zip

TDMS转EXCEL官方插件

最新资源

程控滤波芯片MAX262中文资料数据手册