The ISL32740E is a galvanically isolated high-speed differential bus transceiver, designed for bidirectional data communication on balanced transmission lines. The device uses Giant Magnetoresistance (GMR) as its isolation technology. The part is available in a 16 Ld QSOP package offering unprecedented miniaturization, and in a 16 Ld SOICW package providing a true 8mm creepage distance. The ISL32740E is PROFIBUS compliant, including the rigorous PROFIBUS differential output voltage specifications. A unique ceramic/polymer composite barrier provides excellent isolation and 44, 000 years of barrier life. The device is compatible with 3V as well as 5V input supplies, allowing an interface to standard microcontrollers without additional level shifting. Current limiting and thermal shutdown features protect against output short circuits and bus contention that may cause excessive power dissipation. Receiver inputs are a full fail-safe design, ensuring a logic high R-output if A/B are floating or shorted.

Features

  • 40Mbps data rate
  • 2.5kVRMS isolation/600VRMS working voltage
  • 3V to 5V power supplies
  • 20ns propagation delay
  • 5ns pulse skew
  • 50kV/μs (typical), 30kV/μs (minimum) common-mode transient immunity
  • 15kV ESD protection
  • Low EMC footprint
  • Thermal shutdown protection
  • Temperature ranges available
  • -40°C to +85°C (EIBZ)
  • -40°C to +125°C (EFBZ)
  • Meets or exceeds ANSI RS-485 and ISO 8482:1987(E)
  • PROFIBUS compliant
  • 16 Ld QSOP or 0.3" true 8mm 16 Ld SOICW packages
  • UL 1577 recognized
  • VDE V 0884-10 certified

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
ISL32740EIAZ
Active QSOP Tube 720
Availability
ISL32740EIAZ-T
Active QSOP Reel 2500
Availability
ISL32740EIAZ-T7A
Active QSOP Reel 250
Availability
ISL32740EIBZ
Active SOICW Tube 920
Availability
ISL32740EIBZ-T
Active SOICW Reel 1000
Availability
ISL32740EIBZ-T7A
Active SOICW Reel 250
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL32740E Datasheet Datasheet PDF 985 KB
User Guides & Manuals
ISL32740EVAL2Z User Guide Manual PDF 662 KB
ISL32740EVAL1Z User Guide Manual PDF 822 KB
Application Notes & White Papers
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Application Note PDF 178 KB
AN1991: Isolating RS-485 Interfaces with High-Speed Digital Optocouplers Application Note PDF 513 KB
Boost PROFIBUS RS-485 Robustness with GMR Isolation White Paper PDF 307 KB
AN1990: RS-485 Transceivers in J1708 Physical Layer Applications of Heavy Duty Vehicles Application Note PDF 826 KB
AN1988: Isolated RS-485 Repeaters, the Backbone of Industrial Long Haul Networks Application Note PDF 769 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
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
AN1973: GMR Isolators in IEC61010-1 Edition 3 Systems Application Note PDF 213 KB
AN1971: GMR In Isolation Application Note PDF 218 KB
AN1972: Giant-Magneto-Resistance as Digital Isolation Technology Application Note PDF 296 KB
Downloads
ISL32740EVAL2Z Design Files Design File ZIP 352 KB
ISL32740EVAL1Z Design Files Design File ZIP 301 KB
Other
TB506: Functional Principles of RS-485 Drivers and Receivers Other PDF 156 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Other PDF 240 KB
TB511: The Unit Load Concept Other PDF 253 KB

Boards & Kits

Part Number Title Type Company
ISL32740EVAL1Z Isolated 40Mbps RS-485 PROFIBUS Transceiver Evaluation Board Evaluation Renesas
ISL32740EVAL2Z Isolated 40Mbps RS-485 PROFIBUS Transceiver Evaluation Board Evaluation Renesas