The ISL32172E, ISL32272E, ISL32174E, and ISL32179E are ±16. 5kV IEC61000-4-2 ESD protected, 3. 0V to 5. 5V powered, QUAD transmitters for balanced communication using the RS-422 standard. These drivers have very low output leakage currents (±10µA), so they present a low load to the RS-422 bus. The driver (Tx) outputs are tri-statable and incorporate a hot plug feature to keep them disabled during power-up and power-down. The ISL32172E and ISL32272E have a common EN/EN, the ISL32174E has a two channel EN12/EN34, and the ISL32179E has a versatile combination of individual and group channel enables (see Table 1). Only the ISL32179E driver can be slew-rate limited, and only at the data rate of 0. 46Mbps. Drivers on the other versions are not limited, so they can achieve 10Mbps or 32Mbps data rates. All versions are offered in industrial and extended industrial (-40°C to +125°C) temperature ranges. The ISL32179E's QFN package has a 50% smaller footprint compared to the TSSOP. The ISL32179E also features a logic supply pin (VL) that sets the switching points of the enable and DI inputs to be compatible with a lower supply voltage in mixed voltage systems. Two speed select pins allow the ISL32179E to be configured for 460kbps, 10Mbps, or 32Mbps data rates. Individual channel and group enable pins increase the ISL32179E's flexibility.

Features

  • IEC61000 ESD protection on RS-422 outputs: ±16.5kV
  • Class 3 ESD level on all other pins: 12kV HBM
  • High machine model ESD level on all pins: 700V
  • Wide supply range: 3.0V to 5.5V
  • Specified for +125°C operation
  • Available in industry standard pinouts (ISL32172E, ISL32272E, ISL32174E) or in a space saving QFN (ISL32179E) with added features
  • Logic supply pin (VL) eases operation in mixed supply systems (ISL32179E only)
  • User-selectable data rate (ISL32179E only)
  • Hot plug Tx outputs remain tri-stated during power-up and power-down
  • Low Tx leakage allows > 256 devices on the bus
  • High data rates: up to 32Mbps
  • Low quiescent supply current: 0.8mA (maximum)
  • Low shutdown supply current: 60µA
  • Current limiting and thermal shutdown for driver overload protection
  • Tri-statable Tx outputs
  • 5V tolerant logic inputs when VCC ≤ 5V
  • Pb-free (RoHS compliant)

Applications

  • Telecom Equipment
  • Motor Controllers / Encoders
  • Programmable Logic controllers
  • Industrial/Process Control Networks

descriptionDocumentation

Title language Type Format File Size Date
Datasheets & Errata
star ISL32172E, ISL32272E, ISL32174E, ISL32179E Datasheet Datasheet PDF 1.47 MB
Application Notes & White Papers
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Rev.1.00 Application Note PDF 178 KB
How to Simplify Industrial PC Interfaces 简体中文 White Paper PDF 920 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
PCNs & PDNs
PLC21035 - End of Life Notice Product Life Cycle Notice PDF 1.17 MB
PCN20017 - Alternate bond wire material and assembly facility of the listed Renesas nSOIC packaged products Product Change Notice PDF 266 KB
PA16061 - Introduce New T-type End Plug for n-SOIC rail (packing tube) Product Advisory PDF 106 KB
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
PCN12068 - SOIC w/ Copper Bond Wire @ ASECL as Alternate Assembly Site Product Change Notice PDF 108 KB
PCN11113A - Manufacturing Site Change for Assembly of the Listed Intersil TSSOP Packaged Products - Carsem-M (CAM) - Ipoh, Malaysia Product Change Notice PDF 121 KB
PCN11113 - Manufacturing Site Change for Assembly of the Listed Intersil TSSOP Packaged Products - Carsem-M (CAM) - Ipoh, Malaysia Product Change Notice PDF 120 KB
Other
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
TB506: Functional Principles of RS-485 Drivers and Receivers Other PDF 156 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Technical Brief PDF 300 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

file_downloadDownloads

Title language Type Format File Size Date
Models
ISL32272E IBIS Model Model - IBIS IBS 18 KB