Products > Integrated Circuits (ICs) > Interface ICs > MAX3250EAI-T
  • MAX3250EAI-T

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±50V Isolated, 3.0V to 5.5V, 250kbps, 2 Tx/2 Rx, RS-232 Transceiver

  • Package/Case :
  • SSOP
  • Product Categories :
  • RS-232 Interface IC
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 5000


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MAX3250EAI-T Product Details

The MAX3250EAI-T is a 3.0V to 5.5V powered, ±50V isolated EIA/TIA-232 and V.28/V.24 communications interface with high data-rate capabilities. The MAX3250EAI-T is a dual die part that operates with up to ±50V difference between the RS-232 side and the logic side (ISOCOM to GND). This makes the device ideal for operation in noisy conditions with high common-mode voltages. This feature prevents damage to the device if RS-232 lines are inadvertently short-circuited to a +24V or ±48V power bus. The MAX3250EAI-T is powered by a single 3V to 5.5V supply on the logic side. Power is transferred from the logic side to the isolated side by ±100V external capacitors. The MAX3250EAI-T has two receivers (Rx) and two drivers (Tx) and is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The transceivers have a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a 3V to 5.5V supply with a dual charge pump. The device features an active-low FAULT open-drain output to signal an excessive isolated-side voltage condition on any of the RS-232 inputs. This output can drive an alarm LED or can be monitored by the processor to prevent operation under these conditions. The receiver outputs are high impedance in shutdown, allowing multiple interfaces (IrDA, RS-232, RS-485) to be connected to the same UART. The MAX3250EAI-T is available in a space-saving 28-pin SSOP package.


  • Isolation Breaks Ground Loops Due to High Common-Mode Voltages While Maintaining Data Rate
    • ±50V Isolation
    • 250kbps Guaranteed Data Rate
    • Active-Low FAULT Output Signals Excessive Isolated-Side Voltage
  • Integration of Isolation and RS-232 Saves Space
    • SSOP Package
  • Shutdown Allows Multiple Interfaces (IrDA, RS-232, RS-485) to be Connected to the Same UART
    • High-Impedance Transmitter and Receiver Outputs in Shutdown
    • 20μA Supply Current in Shutdown
  • Inductorless/Transformerless Design Simplifies EMI Compliance
  • Low-Cost Replacement for Opto-Isolated Transceivers
  • Meets EIA/TIA-232 Specifications Down to 3.0V


  • Diagnostic Ports
  • Industrial Control
  • PC-to-Router Connections
  • Point-of-Sale Equipment
  • Programmable Logic Controllers
  • Telecom Equipment

MAX3250EAI-T Block Diagram
(Picture: Diagram)

Technical Parameters

  • Data Rate
  • 250 Kbps
  • Operating Supply Voltage
  • 3 V to 5.5 V
  • Supply Current
  • 35 mA
  • Operating Temperature Range
  • 0 C to + 70 C
  • Mounting Style
  • Function
  • Transceiver
  • Maximum Operating Temperature
  • + 85 C
  • Minimum Operating Temperature
  • - 40 C
  • Number of Drivers
  • 2
  • Number of I/Os
  • 8
  • Number of Receivers
  • 2
  • Propagation Delay Time ns
  • 0.4 us
  • Series
  • MAX3250
  • Shutdown
  • Yes

MAX3250EAI-T Documents

MAX3250EAI-T Related Products

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Estimated Delivery Time: May 12 - May 17 days (choose Expedited at checkout).

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  • charge 3.5% service fee.
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We provide high quality products, thoughtful service and after sale guarantee

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    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 MAX3250EAI-T is the original manufacturer or agent of MAXIM?
We have a professional business development department to strictly test and verify the qualifications of MAXIM original manufacturers and agents. All MAXIM suppliers must pass the qualification review before they can publish their MAX3250EAI-T devices; we pay more attention to the channels and quality of MAX3250EAI-T products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of MAX3250EAI-T chips? Including MAXIM original factory information, RS-232 Interface IC application, MAX3250EAI-T pictures?
You can use Jotrin's intelligent search engine, or filter by RS-232 Line Driver/Receivers category, or find it through Maxim Integrated Information page.
Q: Are the MAXIM's MAX3250EAI-T price and stock displayed on the platform accurate?
The MAXIM's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for MAX3250EAI-T, 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 MAX3250EAI-T?
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 MAX3250EAIT we delivered, we will accept the replacement or return of the MAX3250EAI-T 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 MAX3250EAI-T.
(3)The MAX3250EAI-T 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 MAX3250EAI-T datasheet pdf, MAX3250 pin diagram?
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Maxim Integrated

Maxim Integrated Products is a global range of linearity, mixed-signal integrated circuits (IC) design, R & D and manufacturing leader, has designed, developed, and manufactured analog, mixed-signal, high-frequency, and digital circuits that enable all four of these key interactions....
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