Products > Integrated Circuits (ICs) > Clock & Timer ICs > AB1805-T3
  • AB1805-T3

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AB18 Series 1.7 to 3.6 V 32 kHz SMT Crystal Mode Real Time Clock Module - QFN-16

  • Package/Case :
  • QFN-16
  • Product Categories :
  • Real Time Clock
  • RoHs Status:
  • Rohs
  • In-stock:
  • 11


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AB1805-T3 Product Details

The AB1805-T3 is a Real Time Clock provides a ground-breaking combination of ultra-low power coupled with a highly sophisticated feature set. With power requirements significantly lower than any other industry RTC (as low as 15nA), these are the first semiconductor products based on Abracon Corporation's innovative SPOT (Sub threshold Power Optimized Technology by Ambiq Micro) CMOS platform. The AB08XX includes on-chip oscillators to provide minimum power consumption, full RTC functions including battery backup and programmable counters and alarms for timer and watchdog functions and either an I²C or SPI serial interface for communication with a host controller. It serves as a full function RTC for host processors such as microcontrollers. The Power management features built into the AB08XX enables it to operate as a backup device in both line-powered and battery powered systems.


  • Sub-threshold power optimized technology by Ambiq Micro
  • Ultra-low supply current
  • 32kHz Crystal oscillator with integrated load capacitor/resistor
  • Counters for hundredths, seconds, minutes, hours, date, month, year, century and weekday
  • Alarm capability on all counters
  • Programmable output clock generation (32kHz to 1/year)
  • Countdown timer with repeat function
  • Automatic leap year calculation
  • Integrated power optimized RC oscillator
  • Advanced crystal calibration to ±2ppm
  • Advanced RC calibration to ±16ppm
  • Automatic calibration of RC oscillator to crystal oscillator
  • Watchdog timer with hardware reset
  • Up to 256-byte of general purpose RAM
  • Automatic switchover to VBAT
  • External interrupt monitor
  • Programmable brown out detection
  • Programmable analogue voltage comparator

Technical Parameters

  • Function
  • Clock, Calendar, Alarm
  • RTC Bus Interface
  • I2C
  • Time Format
  • HH:MM:SS:hh
  • Supply Voltage Max
  • 3.6 V
  • Supply Voltage Min
  • 1.7 V
  • Maximum Operating Temperature
  • + 85 C
  • Minimum Operating Temperature
  • - 40 C
  • Mounting Style
  • Package / Case
  • QFN-16
  • Packaging
  • Reel

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Estimated Delivery Time: May 28 - Jun 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 AB1805-T3 is the original manufacturer or agent of ABRACON?
We have a professional business development department to strictly test and verify the qualifications of ABRACON original manufacturers and agents. All ABRACON suppliers must pass the qualification review before they can publish their AB1805-T3 devices; we pay more attention to the channels and quality of AB1805-T3 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of AB1805-T3 chips? Including ABRACON original factory information, Real Time Clock application, AB1805-T3 pictures?
You can use Jotrin's intelligent search engine, or filter by Real Time Clock category, or find it through Abracon Corporation Information page.
Q: Are the ABRACON's AB1805-T3 price and stock displayed on the platform accurate?
The ABRACON's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for AB1805-T3, 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 AB1805-T3?
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 AB1805T3 we delivered, we will accept the replacement or return of the AB1805-T3 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 AB1805-T3.
(3)The AB1805-T3 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 AB1805-T3 datasheet pdf, AB1805 pin diagram?
Need any After-Sales service, please feel free contact us:

Abracon Corporation

Abracon was founded in 1992.Abracon is a leading global manufacturer of passive and electromechanical timing, synchronization, power, connectivity and RF solutions....
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