ISL8490E Intersil Corporation, ISL8490E Datasheet

ISL8490E

Manufacturer Part Number

ISL8490E

Description

RS-485/RS-422 Transceivers

Manufacturer

Intersil Corporation

Datasheet

1.ISL8490E.pdf (13 pages)

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Meier Automation Equipment Co., Limited

Part Number:

ISL8490EIBZ

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INTERSIL

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ISL8490EIBZ-T

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±15kV ESD Protected, 5V, Low Power,

High Speed and Slew Rate Limited, Full

Duplex, RS-485/RS-422 Transceivers

The ISL8488E, ISL8489E, ISL8490E, ISL8491E devices are

ESD protected, BiCMOS, 5V powered, single transceivers

that meet both the RS-485 and RS-422 standards for

balanced communication. Each driver output and receiver

input is protected against ±15kV ESD strikes, without

latch-up. Unlike competitive versions, these Intersil devices

are specified for 10% tolerance supplies (4.5V to 5.5V).

These devices are configured for full duplex (separate Rx

input and Tx output pins) applications, so they are ideal for

RS-422 networks requiring high ESD tolerance on the bus

pins. The ISL8488E, ISL8490E are 8 Ld versions without Rx

and Tx output enables. The other two versions include Rx

and Tx output enable pins in a standard 14 Ld pinout.

The ISL8488E, ISL8489E utilize slew rate limited drivers

which reduce EMI, and minimize reflections from improperly

terminated transmission lines, or unterminated stubs in

multidrop and multipoint applications.

Data rates up to 10Mbps are achievable by using the

ISL8490E, ISL8491E, which feature higher slew rates.

The devices present a “single unit load” to the RS-485 bus,

which allows a total of 32 transmitters and receivers on the

network. For “1/8 unit load” versions (256 devices on the

bus), please refer to the ISL4489E, ISL4491E data sheet.

Receiver (Rx) inputs feature a “fail-safe if open” design,

which ensures a logic high Rx output if Rx inputs are floating.

Driver (Tx) outputs are short circuit protected, even for

voltages exceeding the power supply voltage. Additionally,

on-chip thermal shutdown circuitry disables the Tx outputs to

prevent damage if power dissipation becomes excessive.

NUMBER

ISL8488E

ISL8489E

ISL8490E

ISL8491E

PART

HALF/FULL

DUPLEX

Full

HIGH ESD?

Yes

Data Sheet

ALLOWED ON BUS

NO. OF DEVICES

TABLE 1. SUMMARY OF FEATURES

ISL8488E, ISL8489E, ISL8490E, ISL8491E

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

DATA RATE

(Mbps)

0.25

Features

• RS-485 I/O Pin ESD Protection

• High Data Rates (ISL8490E, ISL8491E) . . up to 10Mbps

• Slew Rate Limited for Error Free Data Transmission

• Single Unit Load Allows up to 32 Devices on the Bus

• Low Quiescent Current:

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

• Three-State Rx and Tx Outputs (Except ISL8488E,

• Full Duplex Pinout

• Operates from a Single +5V Supply (10% Tolerance)

• Current Limiting and Thermal Shutdown for Driver

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Factory Automation

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

• Level Translators (e.g., RS-232 to RS-422)

• RS-232 “Extension Cords”

- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM

(ISL8488E, ISL8489E)

(See ISL4489E, ISL4491E for 256 Devices on Bus)

- 120

- 140

- 370

ISL8490E)

Overload Protection

SLEW-RATE

LIMITED?

All other trademarks mentioned are the property of their respective owners.

A (ISL8488E)

A (ISL8489E)

A (ISL8490E, ISL8491E)

July 26, 2007

Yes

Intersil (and design) is a registered trademark of Intersil Americas Inc.

DRIVER ENABLE?

RECEIVER/

Yes

www.DataSheet4U.com

. . . . . . . . . . . . . ±

QUIESCENT

120

140

370

(μA)

FN6073.4

15kV HBM

COUNT

Related parts for ISL8490E

ISL8490E Summary of contents

Page 1

... Features • RS-485 I/O Pin ESD Protection - Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM • High Data Rates (ISL8490E, ISL8491E 10Mbps • Slew Rate Limited for Error Free Data Transmission (ISL8488E, ISL8489E) • Single Unit Load Allows Devices on the Bus (See ISL4489E, ISL4491E for 256 Devices on Bus) • ...

Page 2

... TOP VIEW GND 6 GND 7 Truth Tables (For ISL8488E, ISL8490E, only the and entries are valid) TRANSMITTING INPUTS Pin Descriptions PIN RO Receiver output > least 0.2V high < 0.2V or more low High if A and B are unconnected (floating). ...

Page 3

... ISL8488E, ISL8489E, ISL8490E, ISL8491E Typical Operating Circuit +5V + 0.1µ GND 4 +5V + 0.1µ GND ISL8488E, ISL8490E T ISL8489E, ISL8491E T www.DataSheet4U.com +5V + 0.1µ ...

Page 4

... 0.4V ≤ V ≤ 2.4V (Note OZR CC O -7V ≤ V ≤ 12V ISL8488E ISL8489E, DE, DI ISL8490E/ISL8491E, DE, DI -7V ≤ V ≤ 12V (Note OSD1 www.DataSheet4U.com = 5V TEMP MIN (°C) (NOTE 9) ...

Page 5

... Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows Unit Loads on the bus. 8. Not applicable to the ISL8488E, ISL8490E. 9. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested. ...

Page 6

... ISL8488E, ISL8489E, ISL8490E, ISL8491E Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 2A. TEST CIRCUIT FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES FIGURE 1. DRIVER V AND 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = |t www ...

Page 7

... FIGURE 4A. TEST CIRCUIT SIGNAL A GENERATOR PARAMETER FIGURE 5A. TEST CIRCUIT FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E, ISL8490E) 7 (Continued) 500Ω GND SW OUT ( (pF) L 1/0 GND 15 0 OUT (Y, Z) 1/0 GND ...

Page 8

... The ISL8488E/ISL8489E driver outputs are slew rate limited to further reduce EMI, and to minimize reflections in unterminated or improperly terminated networks. Data rates on these slew rate limited versions are a maximum of 250kbps. Outputs of ISL8490E/ISL8491E drivers are not limited, so faster output transition times allow data rates of at least 10Mbps. 8 www ...

Page 9

... ISL8488E/ISL8489E 250 200 HIGH 150 100 www.DataSheet4U.com R = 100Ω DIFF R - -25 25 TEMPERATURE (°C) TEMPERATURE ISL8490E/ISL8491E ISL8489E ISL8488E -40 0 -25 25 TEMPERATURE (°C) FIGURE 9. SUPPLY CURRENT vs TEMPERATURE = 54Ω DIFF FN6073.4 July 26, 2007 ...

Page 10

... ISL8488E, ISL8489E, ISL8490E, ISL8491E Typical Performance Curves 750 700 650 600 550 500 450 -40 0 -25 25 TEMPERATURE (°C) FIGURE 10. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL8488E/ISL8489E PLHY 22 t PLHZ PHLY 16 -40 0 -25 25 TEMPERATURE (°C) FIGURE 12. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL8490E/ISL8491E) ...

Page 11

... TRANSISTOR COUNT: 518 PROCESS: Si Gate BiCMOS 5V +25°C; Unless Otherwise Specified 54Ω 100pF FIGURE 17. DRIVER AND RECEIVER WAVEFORMS, www.DataSheet4U.com R = 54Ω, C DIFF TIME (20ns/DIV) HIGH TO LOW (ISL8490E/ISL8491E) = 100pF FN6073.4 July 26, 2007 ...

Page 12

... The lead width “B”, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 12 ISL8488E, ISL8489E, ISL8490E, ISL8491E M8.15 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE ...

Page 13

... ISL8488E, ISL8489E, ISL8490E, ISL8491E Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α µ 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. ...

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