ISL32740E

Isolated 40Mbps RS-485 PROFIBUS Transceiver

Product Status: Mass Production(*)

OVERVIEW

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.

KEY 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL32740E
Basic Information
Production Status
Mass Production(*)
Data Rate
40 Mbps
Half/Full Duplex
Half
Isolation Rating (kV)
2.5kV
Working Voltage (Vrms)
600Vrms
VDD1 (V)
3.0V to 5.5V
VDD2 (V)
4.5V to 5.5V
IDD1 (mA)
3-4mA
IDD2 (mA)
5mA
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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