MAX491EESD+ datasheet, PDF - EEWORLD Datasheet

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MAX491EESD+: DescriptionRS-422/RS-485 interface IC RS-485/RS-422 transceiver; CategoryAnalog mixed-signal IC Drivers and interfaces; File Size334KB，16 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX491EESD+ Overview

RS-422/RS-485 interface IC RS-485/RS-422 transceiver

MAX491EESD+ Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	SOIC
package instruction	SOP, SOP14,.25
Contacts	14
Reach Compliance Code	compli
ECCN code	5A991.B.4
Factory Lead Time	6 weeks
Other features	1 RECEIVER ACTIVE UNDER SHUTDOWN; TRISTATABLE RECEIVER
Differential output	YES
Number of drives	1
High level input current maximum value	0.000002 A
Input properties	DIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit type	LINE TRANSCEIVER
Interface standards	EIA-422; EIA-485
JESD-30 code	R-PDSO-G14
JESD-609 code	e3
length	8.65 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	14
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Minimum output swing	1.5 V
Maximum output low current	0.004 A
Output polarity	COMPLEMENTARY
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP14,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
power supply	5 V
Certification status	Not Qualified
Maximum receive delay	150 ns
Number of receiver bits	1
Maximum seat height	1.75 mm
Maximum slew rate	0.5 mA
Maximum supply voltage	5.25 V
Minimum supply voltage	4.75 V
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
maximum transmission delay	60 ns
width	3.9 mm
Base Number Matches	1

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AVAILAB

MAX481E/MAX483E/MAX485E/

MAX487E–MAX491E/MAX1487E

±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

Functional Diagrams

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

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

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.

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

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

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

19-0410; Rev 4; 10/03

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