The ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, and ISL32498E are fault protected, 5V powered, differential transceivers that exceed the RS-485 and RS-422 standards for balanced communication. The RS-485 transceiver pins (driver outputs and receiver inputs) are fault protected up to ±60V and are protected against ±16. 5kV ESD strikes without latch-up. Additionally, the extended Common-Mode Range (CMR) allows these transceivers to operate in environments with common-mode voltages up to ±25V (>2x the RS-485 requirement), making this fault protected RS-485 family one of the most robust on the market. The transmitters (Tx) deliver an exceptional 2. 5V (typical) differential output voltage into the RS-485 specified 54Ω load. This yields better noise immunity than standard RS-485 ICs, or allows up to six 120Ω terminations in star network topologies. The receiver (Rx) inputs feature a full fail-safe design that ensures a logic high Rx output if the Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. The Rx outputs have high drive levels; typically, 15mA at VOL = 1V (for opto-coupled, isolated applications). Half duplex (Rx inputs and Tx outputs multiplexed together) and full duplex pinouts are available. See Table 1 on page 3 for key features and configurations by device number. For fault protected or wide common-mode range RS-485 transceivers with cable invert (polarity reversal) pins, see the ISL32483E datasheet.

Features

  • Fault protected RS-485 bus pins: up to ±60V
  • Extended CMR: ±25V (more than twice the range required for RS-485)
  • ±16.5kV HBM ESD protection on RS-485 bus pins
  • 1/4 unit load for up to 128 devices on the bus
  • High transient overvoltage tolerance: ±80V
  • Full fail-safe (open, short, terminated) RS-485 receivers
  • High Rx IOL for opto-couplers in isolated designs
  • Hot plug circuitry; Tx and Rx outputs remain three-state during power-up/power-down
  • Choice of RS-485 data rates: 250kbps to 15Mbps
  • Low quiescent supply current: 2.3mA
  • Ultra low shutdown supply current: 10μA

Applications

  • Utility Meters/Automated Meter Reading Systems
  • High Node Count RS-485 Systems
  • PROFIBUS™ and RS-485 Based Field Bus Networks, and Factory Automation
  • Security Camera Networks
  • Building Lighting and Environmental Control Systems
  • Industrial/Process Control Networks

descriptionDocumentation

Title language Type Format File Size Date
star ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E Datasheet Datasheet PDF 1.42 MB
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Rev.1.00 Application Note PDF 178 KB
AN1991: Isolating RS-485 Interfaces with High-Speed Digital Optocouplers Application Note PDF 513 KB
AN1990: RS-485 Transceivers in J1708 Physical Layer Applications of Heavy Duty Vehicles Application Note PDF 826 KB
AN1987: RS-485 External Fail-Safe Biasing for Isolated Long Haul Buses Application Note PDF 443 KB
AN1986: External Fail-Safe Biasing of RS-485 Networks Application Note PDF 582 KB
AN1985: Transient Protection for the Standard RS-485 Transceiver: ISL3152E Application Note PDF 335 KB
AN1989: RS-422 vs RS-485: Similarities and Key Differences Application Note PDF 440 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
AN1593: Add a Loss of Signal (LOS) Indicator to Your RS-485 or RS-422 Transceiver Application Note PDF 559 KB
RS-485 Transceiver Tutorial 简体中文 White Paper PDF 246 KB
PCN20017 - Alternate bond wire material and assembly facility of the listed Renesas nSOIC packaged products Product Change Notice PDF 266 KB
PCN15018 - Data Sheet Specification Change for Listed Intersil ISL3249*E Products Product Change Notice PDF 545 KB
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site Product Change Notice PDF 152 KB
PCN11059 - Shipping Tube Change for Intersil MSOP Packaged Products Product Change Notice PDF 117 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
TB506: Functional Principles of RS-485 Drivers and Receivers Other PDF 156 KB
TB511: The Unit Load Concept Other PDF 253 KB
TB505: Understanding the Difference between HBM and IEC 61000-4-2 ESD Immunity Other PDF 254 KB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Technical Brief PDF 300 KB

file_downloadDownloads

Title language Type Format File Size Date
isl32495e Model - Other IBS 27 KB