Products > Integrated Circuits (ICs) > RT9818E-40PY
  • RT9818E-40PY

Images are for reference only.


Vdet-IC 4.0V±1.5%, +Reset ODO SOT-343R 26ut VD6 5b Rct

  • Package/Case :
  • SC-82
  • Product Categories :
  • Supervisor ; Reset IC
  • RoHs Status:
  • Lead free/RoHS Compliant
  • Marking Code:
  • AB-
  • In-stock:
  • 35484


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RT9818E-40PY Product Details

The RT9818 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (μP) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.2V to 5V, which covers most digital applications. It features low supply current of 3μA. The RT9818 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. This reset signal will last the whole period before VDD recovering. Once VDD recovered upcrossing the threshold level, the reset signal will be released after a certain delay time. RT9818 is provided in SC-82, SC-70-3, SOT-23-3, SOT-23-5 and SOT-89 packages.


  • Internally Fixed Threshold 1.2V to 5V in 0.1V Step
  • High Accuracy ±1.5%
  • Low Supply Current 3μA
  • No External Components Required
  • Quick Reset within 20μs
  • Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options
  • Low Functional Supply Voltage 0.9V
  • N-Channel Open-Drain Output
  • Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89 Packages
  • RoHS Compliant and 100% Lead (Pb)-Free


  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical μP and μC Power Monitoring
  • Portable/Battery-Powered Equipment
  • LCD TV

RT9818E-40PY Block Diagram
(Picture: Diagram)

Technical Parameters

  • Status
  • Active
  • Vin (min) (V)
  • 0.9
  • Vin (max) (V)
  • 6
  • VTH (min) (V)
  • 1.2
  • VTH (max) (V)
  • 5
  • Accuracy (±%)
  • 1.5
  • Reset Active Type
  • Low(Open Drain)
  • Reset Time out Period (typ) (ms)
  • 0
  • Reset Delay Time (typ) (ms)
  • 0.02
  • Package Type
  • SOT-23;SOT-25

RT9818E-40PY Documents

RT9818E-40PY Related Products

Ratings and Reviews (1)

  • 5 / 5
  • 5 Stars 100%
  • 4 Stars 0%
  • 3 Stars 0%
  • 2 Stars 0%
  • 1 Stars 0%
  • **rite***

    Tested on breadboard, works perfectly.

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Shipping More
Estimated Delivery Time: Jan 28 - Feb 02 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 RT9818E-40PY is the original manufacturer or agent of RICHTEK?
We have a professional business development department to strictly test and verify the qualifications of RICHTEK original manufacturers and agents. All RICHTEK suppliers must pass the qualification review before they can publish their RT9818E-40PY devices; we pay more attention to the channels and quality of RT9818E-40PY products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of RT9818E-40PY chips? Including RICHTEK original factory information, Supervisor ; Reset IC application, RT9818E-40PY pictures?
You can use Jotrin's intelligent search engine, or filter by Supervisor ; Reset IC category, or find it through Richtek Technology Corporation Information page.
Q: Are the RICHTEK's RT9818E-40PY price and stock displayed on the platform accurate?
The RICHTEK's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for RT9818E-40PY, 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 RT9818E-40PY?
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 RT9818E40PY we delivered, we will accept the replacement or return of the RT9818E-40PY 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 RT9818E-40PY.
(3)The RT9818E-40PY 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 RT9818E-40PY datasheet pdf, RT9818E pin diagram?
Need any After-Sales service, please feel free contact us:

Richtek Technology Corporation

Richtek is an international analog IC design company specializing in providing customers with diverse and competitive products and complete power management solutions. Since its establishment, Richtek has focused on integrating technical capabilities, adhering to quality and positive customer ser...
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