Products > Integrated Circuits (ICs) > Interface ICs > ISL31498EIUZ-T7A
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RS-422/RS-485 Interface IC 8LD OVP -40+85 5V RS 1/2 DUP 10MBPS TRAN

Manufacturer :
Renesas Technology Corp
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Product Categories :
Interface ICs
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ISL31498EIUZ-T7A Product Details

The ISL31490E, ISL31491E, ISL31492E, ISL31493E, ISL31495E, ISL31496E, ISL31498EIUZ-T7A 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 protected against faults up to ±60V. Additionally, the extended common mode range allows these transceivers to operate in environments with common mode voltages up to ±25V (>2x the RS-485 requirement), making this RS-485 family one of the most robust on the market. Transmitters 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.Receiver (Rx) inputs feature a “Full Fail-safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. 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 devices with cable invert (polarity reversal) please see the ISL32485E datasheet.


  • Fault protected RS-485 bus pins: up to ±60V
  • Extended common mode range: ±25V More than twice the range required for RS-485
  • 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
  • Pb-free (RoHS compliant)

ISL31498EIUZ-T7A Block Diagram
(Picture: Diagram)

Technical Parameters

Data Rate 15 Mbps Function Transceiver
Operating Supply Voltage 5 V Maximum Operating Temperature + 85 C
Supply Current 2.3 mA Minimum Operating Temperature - 40 C
Operating Temperature Range - 40 C to + 85 C Number of Drivers 1
Mounting Style SMD/SMT Number of Receivers 1
Package / Case MSOP-8 Shutdown Yes
Packaging Reel

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In April 2010, NEC electronics and renesas technologies, two major semiconductor manufacturers in Japan, merged, creating a new professional semiconductor manufacturer renesas electronics. Based on i...
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