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  • ST4485EBDR

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RS-422/RS-485 Interface IC 3.3 V powered 15 kV ESD protected

  • Package/Case :
  • SOP8
  • Product Categories :
  • Integrated Circuits - ICs , Interface ICs , RS-422/RS-485 Interface IC
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 7500


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ST4485EBDR Product Details

Guaranteed high receiver output state for floating inputs with no signal present Allow to 64 transceivers on the bus Wide operating temperature range: +105 �C


ESD protection 15 kV human body model 8 kV IEC 1000-4-2 contact discharge Operate from a single 3.3 V supply - no charge pump required Interoperable with 5 V logic 1 �A low current shutdown mode max. Guaranteed 20 Mbps data rate 12 V common mode input voltage range Half duplex versions available Industry standard 75176 pinout Current limiting and thermal shutdown for driver overload protection


The ST4485EBDR device 15 kV ESD protected, 3.3 V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. The ST4485EBDR transmits and receives at a guaranteed data rate of at least 20 Mbps. All transmitter outputs and receiver inputs are protected 15 kV using "Human Body Model". The driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.

Order code ST4485EBDR Temperature range 105 �C Package SO-8 (tape and reel) Packaging 2500 parts per reel

Pin configuration. 3 Truth tables. 4 Maximum ratings. 5 Electrical characteristics. 6 Test circuits and typical characteristics. 9 Package mechanical data. 14 Revision history. 17

Pin 1 2 Symbol RO RE Name and function Receiver output. by 200 mV, RO will be high; by 200 mV, RO will be low. Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. RE is high and DE is low, the device will enter a low power shutdown mode. Driver output enable. The driver outputs are enabled by bringing DE high. They are high impedance when DE is low. RE is high DE is low, the device will enter a low-power shutdown mode. If the driver outputs are enabled, the part functions as line driver, while they are high impedance, it functions as line receivers RE is low. Driver input. A low on DI forces output A low and output B high. Similarly, a high on DI forces output A high and output B low. Ground Non-inverting receiver input and non-inverting driver output Inverting receiver input and inverting driver output Supply voltage: VCC 3.6 V


  • ± 15 kV human body model
  • ± 8 kV IEC 1000-4-2 contact discharge
  • Operate from a single 3.3 V supply - no charge pump required
  • Interoperable with 5 V logic
  • 1 μA low current shutdown mode max.
  • Guaranteed 20 Mbps data rate
  • -7 to 12 V common mode input voltage range
  • Technical Parameters

    • Manufacturer
    • STMicroelectronics
    • Data Rate
    • 20 Mbps
    • Operating Supply Voltage
    • 3 V to 3.6 V
    • Supply Current
    • 2.2 mA
    • Operating Temperature Range
    • - 40 C to + 105 C
    • Mounting Style
    • SMD/SMT
    • Package / Case
    • SO-8
    • Packaging
    • Reel
    • Function
    • Transceiver
    • Input Voltage
    • 3 V to 3.6 V
    • Number of Drivers
    • 1
    • Number of Receivers
    • 1
    • Output Current
    • 250 mA
    • Output Type
    • Differential
    • Output Voltage
    • 14 V
    • Product
    • RS-422/RS-485 Combination
    • Propagation Delay Time ns
    • 30 ns
    • Shutdown
    • Yes

    ST4485EBDR Related Products

    Ratings and Reviews (1)

    • 5 / 5
    • 5 Stars 100%
    • 4 Stars 0%
    • 3 Stars 0%
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    • 1 Stars 0%
    • **rnst***

      Alles ok, blitzschnelle Lieferung, ganz herzlichen Dank!!!

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    Shipping More
    Estimated Delivery Time: Jun 30 - Jul 05 days (choose Expedited at checkout).

    Shipping & Payment


    • Shipping Type
    • Ship Fee
    • Lead Time
    • $20.00-$40.00 (0.50 KG)
    • 2-5 days
    • $20.00-$40.00 (0.50 KG)
    • 3-7 days
    • $20.00-$45.00 (0.50 KG)
    • 2-5 days
    • $25.00-$65.00 (0.50 KG)
    • 2-5 days
    • $25.00-$45.00 (0.50 KG)
    • 5-14 days
    • $2.00-$3.00 (0.10 KG)
    • 7-30 days

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


    • Terms of payment
    • Hand Fee
    • Payment Site
    • charge US$30.00 banking fee.
    • charge 4.0% service fee.
    • charge 3.5% service fee.
    • charge US$0.00 banking fee.
    • charge US$0.00 banking fee.

    We provide high quality products, thoughtful service and after sale guarantee

    • We have rich products, can meet your various needs.

      We have rich products, can meet your various needs.

    • Minimum order quantity starts from 1pcs.

      Minimum order quantity starts from 1pcs.

    • Lowest international shipping fee starts from US$2.00.

      Lowest international shipping fee starts from US$2.00.

    • 90 days quality guarantee for all products.

      90 days quality guarantee for all products.


    • Step1:Product

      Step1: Products

    • Step2:Vacuum packaging

      Step2: Vacuum Packaging

    • Step3:Anti-static bag

      Step3: Anti-Static Bag

    • Step4:Individual packaging

      Step4: Individual Packaging

    • Step5:Packaging boxes

      Step5: Packaging Boxes

    • Step6: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.

    Jotrin ESD packing


    1.We provide 90 days warranty.

    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.


    Q: How does Jotrin guarantee that ST4485EBDR is the original manufacturer or agent of ST?
    We have a professional business development department to strictly test and verify the qualifications of ST original manufacturers and agents. All ST suppliers must pass the qualification review before they can publish their ST4485EBDR devices; we pay more attention to the channels and quality of ST4485EBDR products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
    Q: How to find the detailed information of ST4485EBDR chips? Including ST original factory information, Integrated Circuits - ICs , Interface ICs , RS-422/RS-485 Interface IC application, ST4485EBDR pictures?
    You can use Jotrin's intelligent search engine, or filter by Interfaces and Transceivers ; RS-422 RS-423 RS-485 category, or find it through STMicroelectronics, Inc Information page.
    Q: Are the ST's ST4485EBDR price and stock displayed on the platform accurate?
    The ST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for ST4485EBDR, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
    Q: Can I place an order offline?
    Yes. We accept offline orders.
    We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
    Q: What forms of payment can I use in Jotrin?
    TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
    Q: How is the shipping arranged and track my package?
    Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
    Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
    Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
    Q: What is the process for returns or replacement of ST4485EBDR?
    All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the ST4485EBDR we delivered, we will accept the replacement or return of the ST4485EBDR only when all of the below conditions are fulfilled:
    (1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
    (2)We are informed of the defect described above within 90 days after the delivery of ST4485EBDR.
    (3)The ST4485EBDR is unused and only in the original unpacked packaging.
    Two processes to return the products:
    (1)Inform us within 90 days
    (2)Obtain Requesting Return Authorizations
    More details about return electronic components please see our Return & Change Policy.
    Q: How to contact us and get support, such as ST4485EBDR datasheet pdf, ST4485EB pin diagram?
    Need any After-Sales service, please feel free contact us:

    STMicroelectronics, Inc

    ST Microelectronics is a global independent semiconductor company and a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications, and that designs, develops, manufactures and markets a broad spectrum of products....
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