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1/1 Transceiver Full RS422, RS485 14-SOIC

Ovaga Certification

Brands: Analog Devices, Inc

Mfr.Part #: ADM3491EARZ

Datasheet: ADM3491EARZ Datasheet (PDF)

Package/Case: SOIC-14

Product Type: Interface ICs

RoHS Status:

Stock Condition: 3380 pcs, New Original

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ADM3491EARZ General Description

The ADM3483E / ADM3486E / ADM3488E / ADM3490E / ADM3491E are 3.3 V low power data transceivers with ±15 kV ESD protection suitable for full andhalf-duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission and comply with TIA/EIA standards RS-485 and RS-422. The ADM3483E / ADM3486E is a half-duplex transceiver that shares differential lines and has separate enable inputs for the driver and receiver. The full-duplex ADM3488E / ADM3490E / ADM3491E transceivers have dedicated differential line driver outputs and receiver inputs. The ADM3491E also features enable inputs for the driver and receiver.



  • TIA/EIA RS-485/RS-422 compliant
  • ±15 kV ESD-protection on RS-485 input/output pins
  • Data rates - ADM3490E / ADM3491E: 12 Mbps
  • Full duplex
  • 32 nodes on the bus
  • Receiver open-circuit, fail-safe design


Parameter Value Parameter Value
feature-maximum-operating-supply-voltage-v feature-process-technology
feature-minimum-operating-supply-voltage-v feature-packaging Tube
feature-rad-hard feature-pin-count 14
feature-supplier-package SOIC N feature-standard-package-name1 SO
feature-cecc-qualified No feature-esd-protection Yes
feature-escc-qualified feature-military No
feature-aec-qualified No feature-aec-qualified-number
feature-auto-motive No feature-p-pap No
feature-eccn-code EAR99 feature-svhc No
feature-svhc-exceeds-threshold No


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

Processing Time:Shipping fee depend on different zone and country.


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.0% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US$0.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Datasheet PDF

Preliminary Specification ADM3491EARZ PDF Download

Key points

  • The ADM3491EARZ is a chip that belongs to the RS-485/RS-422 transceiver family. It is designed to facilitate bidirectional data transmission over long distances using balanced transmission lines. The chip provides a reliable and robust communication interface, with features like high-speed data rate, low power consumption, and built-in protection mechanisms. It finds applications in industrial, automotive, and telecommunication systems.
  • Features

    The ADM3491EARZ is a half-duplex RS-485/RS-422 interface IC that includes a low power transceiver, line driver, and receiver. It operates at data rates up to 20 Mbps and features a receiver failsafe function, which ensures a logic high output when inputs are disconnected or shorted. The device also offers ±7 kV ESD protection on the bus pins for added reliability in harsh environments.
  • Pinout

    The ADM3491EARZ is a 8-pin RS-485 transceiver. It supports half-duplex communication and features a slew rate-limited output, which helps to reduce electromagnetic interference. The pinout includes the A and B differential bus lines, as well as other pins for power supply and control signals.
  • Manufacturer

    The manufacturer of the ADM3491EARZ is Analog Devices. Analog Devices is a multinational semiconductor company that designs and manufactures products such as analog, mixed-signal, and digital signal processing integrated circuits.
  • Application Field

    The ADM3491EARZ is a low-power, fully isolated RS-485 transceiver. It is commonly used in industrial automation, building automation, and HVAC systems where reliable and secure communication is required over long distances. It is also suitable for applications in automotive, aerospace, and energy sectors where noise rejection and high-voltage isolation are crucial.
  • Package

    The ADM3491EARZ chip comes in a small outline integrated circuit (SOIC) package type with a 16-pin configuration. Its form is surface mount, which allows for direct placement on a printed circuit board. The dimensions of the chip are approximately 7.5mm x 10.3mm x 2.35mm.

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