Details, datasheet, quote on part number: ISL4491EIB
PartISL4491EIB
CategoryInterface and Interconnect => RS-485/RS-422
Description15kV Esd Protected, 1/8 Unit Load, 5V, Low Power, Slew Rate Limited, Full Duplex, RS-485/RS-422 Transceivers <<<>>>The ISL4489E, ISL4491E Are Esd Protected, Fractional Unit Load, 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).
CompanyIntersil Corporation
DatasheetDownload ISL4491EIB datasheet
Cross ref.Similar parts: LMS202E, MAX202, MAX222, MAX232, MAX232E, MAX3221, MAX3221-EP, MAX3221E, MAX3222, MAX3222E
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Features, Applications

15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed and Slew Rate Limited, Full Duplex, RS-485/RS-422 Transceivers

The ISL4489E, ISL4491E are ESD protected, "fractional" unit load, 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 5.5V). Rx inputs and Tx outputs present a "1/8 unit load" to the RS-485 bus, which allows a total of 256 transmitters and receivers on the network for large node count systems. 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 ISL4489E utilizes a slew rate limited driver which reduces EMI, and minimizes reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Data rates to 15Mbps are achievable by using the ISL4491E, which features higher slew rates. 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.

Features

RS-485 I/O Pin ESD Protection. 15kV HBM - Class 3 ESD Level on all Other Pins. >7kV HBM 1/8 Unit Load Allows to 256 Devices on the Bus High Data Rates to 15Mbps Slew Rate Limited Version for Error Free Data Transmission (ISL4489E) Very Low Quiescent Current: to +12V Common Mode Input Voltage Range Three-State Rx and Tx Outputs Full Duplex Pinout Operates from a Single +5V Supply (10% Tolerance) Current Limiting and Thermal Shutdown for driver Overload Protection

Applications

Factory Automation Security Networks Building Environmental Control Systems Industrial/Process Control Networks Level Translators (e.g., RS-422) RS-232 "Extension Cords"

TABLE 1. SUMMARY OF FEATURES PART NUMBER ISL4489E ISL4491E HALF/FULL DUPLEX Full HIGH ESD? Yes NO. OF DEVICES ALLOWED ON BUS 256 DATA RATE (Mbps) 0.25 15 SLEW-RATE RECEIVER/ QUIESCENT PIN LIMITED? DRIVER ENABLE? ICC (A) COUNT Yes No Yes

PART NO. ISL4489EIB ISL4489EIB-T TEMP. RANGE (C) to 85 PACKAGE 14 Ld SOIC 14 Ld SOIC Tape and Reel 14 Ld SOIC PKG. DWG. # M14.15

PART NO. ISL4491EIB-T TEMP. RANGE (C) to 85 PACKAGE 14 Ld SOIC Tape and Reel PKG. DWG. # M14.15

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.

TRANSMITTING INPUTS 0 DI High-Z OUTPUTS 1 0 High-Z RE RECEIVING INPUTS DE A-B +0.2V -0.2V Inputs Open X OUTPUT 0 1 High-Z

PIN DE DI GND VCC NC FUNCTION Receiver output: by at least RO is high; 0.2V or more, RO is low; RO = High if A and B are unconnected (floating). Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. Ground connection. 15kV HBM ESD Protected, Noninverting receiver input. 15kV HBM ESD Protected, Inverting receiver input. 15kV HBM ESD Protected, Noninverting driver output. 15kV HBM ESD Protected, Inverting driver output. System power supply input 5.5V). No Connection.


 

Related products with the same datasheet
ISL4489EIB
ISL4489EIB-T
ISL4491E
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