Products > Integrated Circuits (ICs) > Interface ICs > MAX3109ETJ+
  • MAX3109ETJ+

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UART Interface, 2 Channel, 24 Mbps, 1.71 V, 3.6 V, TQFN, 32 Pins

  • Package/Case :
  • TQFN-32
  • Product Categories :
  • UART Interface IC
  • RoHs Status:
  • Rohs
  • In-stock:
  • 1000


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MAX3109ETJ+ Product Details

The MAX3109ETJ+ is a dual serial UART with 128word FIFOs in 32 pin TQFN package. This advanced dual universal asynchronous receiver-transmitter (UART) has 128words of receive and transmit first-in/first-out (FIFO) and high speed SPI or I2C controller interface. The 2x and 4x rate modes allow maximum of 24Mbps data rates. A phase locked loop (PLL) and fractional baud rate generators allow high degree of flexibility in baud rate programming and reference clock selection. The independent logic level translation on transceiver and controller interfaces allows ease of interfacing to microcontrollers, FPGAs and transceivers that are powered by differing supply voltages. Automatic hardware and software flow control with selectable FIFO interrupt triggering off loads low level activity from host controller. Automatic half duplex transceiver control with programmable set-up and hold times allow the MAX3109ETJ+ to be used in high speed applications such as PROFIBUSDP.


  • Analogue Supply voltage range from 1.71V to 3.6V (internal PLL disabled and bypassed)
  • Operating temperature range from -40°C to 85°C
  • Register compatible with MAX3107, MAX3108 and MAX14830 devices
  • SPI up to 26MHz clock rate and fast mode plus I2C up to 1MHz
  • Automatic active-low RTS and active-low CTS flow control
  • Automatic XON/XOFF software flow control and line noise indication
  • Special character detection and 9bit multidrop mode data filtering
  • SIR and MIR compliant IrDASM encoder/decoder
  • 500µA VCC supply current (1.8MHz crystal oscillator active, PLL disabled) and 1µA shutdown current
  • Two timers routed to GPIOs, 8 flexible GPIOs with 20mA drive capability


  • Automotive Infotainment Systems
  • Handheld Devices
  • HVAC or Building Control
  • Medical Systems
  • Point-of-Sales Systems
  • Power Meters
  • Programmable Logic Controllers (PLCs)

MAX3109ETJ+ Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of Channels
  • 2
  • Data Rate
  • 24 Mbps
  • Supply Voltage Max
  • 3.6 V
  • Supply Voltage Min
  • 1.71 V
  • Supply Current
  • 4 mA
  • Maximum Operating Temperature
  • + 85 C
  • Minimum Operating Temperature
  • - 40 C
  • Package / Case
  • TQFN-32
  • Mounting Style
  • Type
  • Quad Serial UART with 128-Word FIFOs

MAX3109ETJ+ Documents

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Estimated Delivery Time: Oct 01 - Oct 06 days (choose Expedited at checkout).

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  • $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 MAX3109ETJ+ 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 MAX3109ETJ+ devices; we pay more attention to the channels and quality of MAX3109ETJ+ products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of MAX3109ETJ+ chips? Including MAXIM original factory information, UART Interface IC application, MAX3109ETJ+ pictures?
You can use Jotrin's intelligent search engine, or filter by SPI/Microwire-Compatible UARTs category, or find it through Maxim Integrated Information page.
Q: Are the MAXIM's MAX3109ETJ+ 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 MAX3109ETJ+, 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 MAX3109ETJ+?
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 MAX3109ETJ+ we delivered, we will accept the replacement or return of the MAX3109ETJ+ 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 MAX3109ETJ+.
(3)The MAX3109ETJ+ 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 MAX3109ETJ+ datasheet pdf, MAX3109 pin diagram?
Need any After-Sales service, please feel free contact us:

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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