MAX485E datasheet, PDF - EEWORLD Datasheet

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MAX485E: DescriptionLINE TRANSCEIVER, PDSO8; Categorysemiconductor Analog mixed-signal IC; File Size144KB，16 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX485E Overview

LINE TRANSCEIVER, PDSO8

MAX485E Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	8
Maximum operating temperature	70 Cel
Minimum operating temperature	0.0 Cel
Maximum supply voltage 1	5.25 V
Minimum supply voltage 1	4.75 V
Rated supply voltage 1	5 V
Processing package description	0.150 INCH, MS-012A, SOIC-8
state	ACTIVE
Craftsmanship	CMOS
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	1.27 mm
terminal coating	TIN LEAD
Terminal location	DUAL
Packaging Materials	PLASTIC/EPOXY
Temperature level	COMMERCIAL
Max TPHL driver	60 ns
Interface Type	LINE TRANSCEIVER
Interface standards	EIA-422; EIA-485
Max TPHL receiver	200 ns
Differential output	Yes
Number of drive digits	1
Input properties	DIFFERENTIAL SCHMITT TRIGGER
Number of receiver bits	1

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19-0410; Rev 4; 10/03

±15kV ESD-Protected, Slew-Rate-Limited,

Low-Power, RS-485/RS-422 Transceivers

General Description

The MAX481E, MAX483E, MAX485E, MAX487E–

MAX491E, and MAX1487E are low-power transceivers for

RS-485 and RS-422 communications in harsh environ-

ments. Each driver output and receiver input is protected

against ±15kV electro-static discharge (ESD) shocks,

without latchup. These parts contain one driver and one

receiver. The MAX483E, MAX487E, MAX488E, and

MAX489E feature reduced slew-rate drivers that minimize

EMI and reduce reflections caused by improperly termi-

nated cables, thus allowing error-free data transmission

up to 250kbps. The driver slew rates of the MAX481E,

MAX485E, MAX490E, MAX491E, and MAX1487E are not

limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw as little as 120µA supply cur-

rent when unloaded or when fully loaded with disabled

drivers (see

Selector Guide).

Additionally, the MAX481E,

MAX483E, and MAX487E have a low-current shutdown

mode in which they consume only 0.5µA. All parts oper-

ate from a single +5V supply.

Drivers are short-circuit current limited, and are protected

against excessive power dissipation by thermal shutdown

circuitry that places their outputs into a high-impedance

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

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

The MAX487E and MAX1487E feature quarter-unit-load

receiver input impedance, allowing up to 128 trans-

ceivers on the bus. The MAX488E–MAX491E are

designed for full-duplex communications, while the

MAX481E, MAX483E, MAX485E, MAX487E, and

MAX1487E are designed for half-duplex applications.

For applications that are not ESD sensitive see the pin-

and function-compatible MAX481, MAX483, MAX485,

MAX487–MAX491, and MAX1487.

Next-Generation Device Features

♦

For Fault-Tolerant Applications:

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

Unit Load, +3.3V, RS-485 Transceiver

MAX3080–MAX3089: Fail-Safe, High-Speed

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

Transceivers

♦

For Space-Constrained Applications:

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

MAX3030E–MAX3033E: ±15kV ESD-Protected,

+3.3V, Quad RS-422 Transmitters

♦

For Multiple Transceiver Applications:

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

SOT23, RS-485/RS-422 Transmitters

♦

For Fail-Safe Applications:

MAX3440E–MAX3444E: ±15kV ESD-Protected,

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

RS-485/J1708 Transceivers

♦

For Low-Voltage Applications:

MAX3483E/MAX3485E/MAX3486E/MAX3488E/

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

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

True RS-485/RS-422 Transceivers

MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E

Applications

Low-Power RS-485 Transceivers

Low-Power RS-422 Transceivers

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

PART

MAX481ECPA

MAX481ECSA

MAX481EEPA

MAX481EESA

MAX483ECPA

MAX483ECSA

MAX483EEPA

MAX483EESA

Ordering Information

TEMP RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

8 Plastic DIP

8 SO

8 Plastic DIP

8 SO

8 Plastic DIP

8 SO

8 Plastic DIP

8 SO

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

________________________________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

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

MAX485E Related Products

	MAX485E	MAX481E_03	MAX491E	MAX487E	MAX483E	MAX481E	MAX1487E
Description	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8	LINE TRANSCEIVER, PDSO8
Number of functions	1	1	1	1	1	1	1
Number of terminals	8	8	8	8	8	8	8
Maximum operating temperature	70 Cel	70 Cel	70 Cel	70 Cel	70 Cel	70 Cel	70 Cel
Minimum operating temperature	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel
Maximum supply voltage 1	5.25 V	5.25 V	5.25 V	5.25 V	5.25 V	5.25 V	5.25 V
Minimum supply voltage 1	4.75 V	4.75 V	4.75 V	4.75 V	4.75 V	4.75 V	4.75 V
Rated supply voltage 1	5 V	5 V	5 V	5 V	5 V	5 V	5 V
Processing package description	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8	0.150 INCH, MS-012A, SOIC-8
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE	ACTIVE
Craftsmanship	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
packaging shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package Size	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
surface mount	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal spacing	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm
terminal coating	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Packaging Materials	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
Temperature level	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
Max TPHL driver	60 ns	60 ns	60 ns	60 ns	60 ns	60 ns	60 ns
Interface Type	LINE TRANSCEIVER	LINE TRANSCEIVER	LINE TRANSCEIVER	LINE TRANSCEIVER	LINE TRANSCEIVER	LINE TRANSCEIVER	LINE TRANSCEIVER
Interface standards	EIA-422; EIA-485	EIA-422; EIA-485	EIA-422; EIA-485	EIA-422; EIA-485	EIA-422; EIA-485	EIA-422; EIA-485	EIA-422; EIA-485
Max TPHL receiver	200 ns	200 ns	200 ns	200 ns	200 ns	200 ns	200 ns
Differential output	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Number of drive digits	1	1	1	1	1	1	1
Input properties	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER	DIFFERENTIAL SCHMITT TRIGGER
Number of receiver bits	1	1	1	1	1	1	1

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