ADM489 5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver (with DE/RE)

The ADM488 and ADM489 are low power differential line transceiver suitable for communication on multipoint bus transmission lines.

They are intended for balanced data transmission and comply with both EIA Standards RS-485 and RS-422. Both products contains a single differential line driver and a single differential line receiver making them suitable for full duplex data transfer.

The ADM489 contains an additional receiver and driver enable control.

The input impedance is 12 kohms, allowing 32 transceivers to be connected on the bus.

The ADM488/ADM489 operates from a single +5 V ± 10% power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if during fault conditions a significant temperature increase is detected in the internal driver circuitry.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM488/ADM489 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488/ADM489 is fully specified over the industrial temperature range and is available in DIP, SOIC and TSSOP packages.

Features and Benefits
  • Meets EIA RS-485 Standard
  • 250 kbps Data Rate
  • Single 5 V ± 10% Supply
  • –7 V to +12 V Bus Common-Mode Range
  • 12 kO Input Impedance
  • 2 kV EFT Protection Meets IEC1000-4-4
  • High EM Immunity Meets IEC1000-4-3
  • Reduced Slew Rate for Low EM Interference
  • Short Circuit Protection
  • Excellent Noise Immunity
  • 30 µA Supply Current
Interface & Isolation
Data Sheets
Documentnote
ADM488/ADM489: Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev. D)PDF 379 kB
Application Notes
Documentnote
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0)PDF 671 kB
AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0)PDF 245 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADM489AN Obsolete14 ld PDIPOTH 2500N
ADM489ANZ Production14 ld PDIPOTH 25-40 to 85C1.951.78Y
ADM489AR Obsolete14 ld SOICOTH 5600N
ADM489AR-REEL Obsolete14 ld SOICREEL 250000N
ADM489AR-REEL7 Obsolete14 ld SOICREEL 100000N
ADM489ARU Obsolete16 ld TSSOPOTH 9600N
ADM489ARUZ Production16 ld TSSOPOTH 96-40 to 85C1.771.62Y
ADM489ARUZ-REEL Production16 ld TSSOPREEL 2500-40 to 85C1.771.62Y
ADM489ARZ Production14 ld SOICOTH 56-40 to 85C00Y
ADM489ARZ-REEL Production14 ld SOICREEL 2500-40 to 85C00Y
ADM489ARZ-REEL7 Production14 ld SOICREEL 1000-40 to 85C00Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-RS485FDEBZEvaluation Board30Y
Reference Materials
ADM488/ADM489: Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev. D) adm488
AN-1176：二进制.Bxl文件格式的元件尺寸和符号 (Rev. 0) adn4670
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0) adn4670
AN-960: RS-485/RS-422电路实施指南 (Rev. 0) adm2486
AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0) adm2486
Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4 ad7656
Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 ad7780
RS-232 Transceivers Cross Reference Guide adm2486
ADI RS-485/RS-422 Cross Reference Guide adm2486
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