MAX483C/D Maxim Integrated, MAX483C/D Datasheet

MAX483C/D

Manufacturer Part Number

MAX483C/D

Description

RS-422/RS-485 Interface IC

Manufacturer

Maxim Integrated

Datasheet

1.MAX490CD.pdf (17 pages)

Specifications of MAX483C/D

Data Rate

250 Kbps

Operating Supply Voltage

5 V

Supply Current

0.25 mA

Operating Temperature Range

0 C to + 70 C

Number Of Drivers

Number Of Receivers

Product

RS-422/RS-485 Combination

Current page: 1 of 17
Download datasheet (2Mb)

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

The MAX481, MAX483, MAX485, MAX487–MAX491, and

MAX1487 are low-power transceivers for RS-485 and RS-

422 communication. Each part contains one driver and one

receiver. The MAX483, MAX487, MAX488, and MAX489

feature reduced slew-rate drivers that minimize EMI and

reduce reflections caused by improperly terminated cables,

thus allowing error-free data transmission up to 250kbps.

The driver slew rates of the MAX481, MAX485, MAX490,

MAX491, and MAX1487 are not limited, allowing them to

transmit up to 2.5Mbps.

These transceivers draw between 120µA and 500µA of

supply current when unloaded or fully loaded with disabled

drivers. Additionally, the MAX481, MAX483, and MAX487

have a low-current shutdown mode in which they consume

only 0.1µA. All parts operate from a single 5V supply.

Drivers are short-circuit current limited and are protected

against excessive power dissipation by thermal shutdown

circuitry that places the driver outputs into a high-imped-

ance state. The receiver input has a fail-safe feature that

guarantees a logic-high output if the input is open circuit.

The MAX487 and MAX1487 feature quarter-unit-load

receiver input impedance, allowing up to 128 MAX487/

MAX1487 transceivers on the bus. Full-duplex communi-

cations are obtained using the MAX488–MAX491, while

the MAX481, MAX483, MAX485, MAX487, and MAX1487

are designed for half-duplex applications.

________________________Applications

______________________________________________________________Selection Table

MAX1487

NUMBER

MAX481

MAX483

MAX485

MAX487

MAX488

MAX489

MAX490

MAX491

PART

Low-Power RS-485 Transceivers

Low-Power RS-422 Transceivers

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

HALF/FULL

DUPLEX

Half

Full

Functional Diagrams

General Description

(Mbps)

DATA

RATE

0.25

2.5

SLEW-RATE

LIMITED

Yes

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

SHUTDOWN

POWER

LOW-

Yes

MAX487–MAX491/MAX1487

MAX481/MAX483/MAX485/

♦ ♦ For Fault-Tolerant Applications

♦ ♦ For Space-Constrained Applications

♦ ♦ For Multiple Transceiver Applications

♦ ♦ For Fail-Safe Applications

♦ ♦ For Low-Voltage Applications

Ordering Information appears at end of data sheet.

__Next Generation Device Features

RECEIVER/

ENABLE

DRIVER

MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4

Unit Load, +3.3V, RS-485 Transceiver

MAX3440E–MAX3444E: ±15kV ESD-Protected,

±60V Fault-Protected, 10Mbps, Fail-Safe,

RS-485/J1708 Transceivers

MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,

Profibus RS-485/RS-422 Transceivers

MAX3362: +3.3V, High-Speed, RS-485/RS-422

Transceiver in a SOT23 Package

MAX3280E–MAX3284E: ±15kV ESD-Protected,

52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,

True Fail-Safe Receivers

MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,

SOT23, RS-485/RS-422 Transmitters

MAX3030E–MAX3033E: ±15kV ESD-Protected,

+3.3V, Quad RS-422 Transmitters

MAX3080–MAX3089: Fail-Safe, High-Speed

(10Mbps), Slew-Rate-Limited RS-485/RS-422

Transceivers

MAX3483E/MAX3485E/MAX3486E/MAX3488E/

MAX3490E/MAX3491E: +3.3V Powered, ±15kV

ESD-Protected, 12Mbps, Slew-Rate-Limited,

True RS-485/RS-422 Transceivers

Yes

QUIESCENT

CURRENT

(μA)

300

120

300

120

300

230

RECEIVERS ON

NUMBER OF

BUS

128

19-0122; Rev 9; 9/09

COUNT

Related parts for MAX483C/D

MAX483C/D Summary of contents

Page 1

... Full 2.5 Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. MAX491 Full 2.5 UCSP is a trademark of Maxim Integrated Products, Inc. MAX1487 Half 2.5 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. MAX481/MAX483/MAX485/ MAX487– ...

Page 2

... V ≤ 12V, all devices except CM MAX487/MAX1487 R IN -7V ≤ V ≤ 12V, MAX487/MAX1487 CM MIN TYP MAX 2 1.5 2 12V -7V -0 12V 0. -7V -0.2 IN -0 UNITS 0 0 0.8 V ±2 µ 0.4 V ±1 µA kΩ kΩ Maxim Integrated ...

Page 3

... Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable Time from Low Receiver Disable Time from High Maximum Data Rate f Time to Shutdown t SHDN Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers CONDITIONS MAX488/MAX489, DE, DI MAX490/MAX491, DE, DI ...

Page 4

... MAX UNITS 250 800 2000 ns 250 800 2000 100 800 ns 250 2000 ns 250 2000 ns 250 2000 ns 300 3000 ns 300 3000 ns 250 2000 ns 250 2000 100 250 kbps 50 200 600 ns 2000 ns 2000 ns 2500 ns 2500 ns Maxim Integrated ...

Page 5

... OUTPUT LOW VOLTAGE (V) RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE 0.9 0 8mA RO 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -50 - 100 TEMPERATURE (°C) Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers = 5V and T = +25° OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE -20 -18 -16 -14 -12 - 2.5 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT HIGH VOLTAGE (V) DRIVER OUTPUT CURRENT vs ...

Page 6

... MAX485 MAX481 200 MAX490/MAX491 100 MAX481 -50 - TEMPERATURE (°C) MAX1487 SUPPLY CURRENT vs. TEMPERATURE MAX1487 MAX1487 0V -60 -40 - 100 120 140 TEMPERATURE (°C) Maxim Integrated 75 100 125 ...

Page 7

... MAX483 MAX485 MAX487 MAX1487 μMAX Figure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating Circuit Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers NAME MAX489/ NAME MAX491 DIP/SO Receiver Output > 200mV, RO will be high < 200mV, RO will be low. ...

Page 8

... The MAX481/MAX483/MAX485 and MAX488–MAX491 have standard 12kΩ Receiver Input impedance. V MAX488 MAX490 GND MAX489 MAX491 GND MAX487/MAX1487: 128 Transceivers on the Bus 1 -unit-load receiver input impedance of the / Maxim Integrated ...

Page 9

... EMI and reducing reflections caused by improperly terminated cables. Figure 12 shows the dri- ver output waveform and its Fourier analysis of a 150kHz signal transmitted by a MAX481, MAX485, MAX490, MAX491, or MAX1487. High-frequency har- Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers RECEIVER ...

Page 10

... Shutdown mode for MAX481/MAX483/MAX487 1.5V 1. ZL(SHDN) ZL 2.3V OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH 2. ZH(SHDN 1.5V 1. ZL(SHDN 1.5V OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH 1. ZH(SHDN INPUTS OUTPUT DE A > +0. < -0. Inputs open High-Z Maxim Integrated ...

Page 11

... ZH(SHDN ZL(SHDN (The parts are in operating mode if the inputs equal a logical 0 0.) Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 10dB/div 0Hz 5MHz Figure 13. Driver Output Waveform and FFT Plot of MAX483/ MAX487–MAX489 Transmitting a 150kHz Signal ...

Page 12

... 54Ω 100pF = 5V CC 500mV/div = +25°C A 2V/div Figure 16. MAX481/MAX485/MAX490/MAX491/MAX1487 Receiver t 500mV/div +25°C A 2V/div Figure 18. MAX483, MAX487–MAX489 Receiver t PHL RECEIVER R OUT +25° 20ns/div PLH +25° 400ns/div PLH Maxim Integrated ...

Page 13

... MAX481 MAX483 MAX485 MAX487 MAX1487 Figure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 Network Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers Figures 21 and 22 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 23 ...

Page 14

... Figure 23. Line Repeater for MAX488–MAX491 For isolated RS-485 applications, see the MAX253 and MAX1480 data sheets. MAX488–MAX491 DATA IN DATA OUT Y 120Ω 120Ω MAX488–MAX491 Isolated RS-485 Maxim Integrated ...

Page 15

... MAX481MJA -55°C to +125° CPA 0°C to +70°C MAX483CSA 0°C to +70°C MAX483CUA 0°C to +70°C MAX483C/D 0°C to +70°C MAX483EPA -40°C to +85°C MAX483ESA -40°C to +85°C MAX483MJA -55°C to +125° CPA 0° ...

Page 16

... CERDIP 14 Plastic DIP CERDIP 0.054" Z (1.372mm TRANSISTOR COUNT: 248 SUBSTRATE CONNECTED TO GND PACKAGE CODE P8-1 S8-2 U8-1 J8-2 P14-3 S14-1 J14-3 MAX489/MAX491 0.054" Z (1.372mm) Y GND 0.080" (2.032mm) Package Information DOCUMENT NO. 21-0043 21-0041 21-0036 21-0045 21-0043 21-0041 21-0045 Maxim Integrated ...

Page 17

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2009 Maxim Integrated MAX487–MAX491/MAX1487 Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers DESCRIPTION The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. Revision History PAGES CHANGED — ...

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